Circuit anatomical properties
This sub-section evaluates the anatomical circuit properties of the reconstructed microcircuit .
Evaluated properties include column dimensions, laminar dimensions, density of neurons, laminar distribution of neurons, total axon and dendritic lengths, total number of synapses and densities, and thalamocortical innervation profiles.
The results of the consistency check were categorized as consistent, inconsistent, possibly consistent, not implemented or not applicable based on agreement with a given evaluation criterion.
14 paper(s) | |
1 paper(s) | |
4 paper(s) | |
17 paper(s) | |
6 paper(s) |
consistent - J.F. Staiger - Connectivity in the somatosensory cortex of the adolescent rat: an in vitro biocytin study.
- input/validation/consistent
- consistent
- evaluation criterion
- thalamocortical innervation - laminar patterns
- id
- 1
- species
- rat
- age
- p15 - p25
- brain region
- barrel cortex
- layer
- all
- cell
- aspect
- staining talamo-cortical and cortico-cortical connections
- key result(s)
- Connectivity in the somatosensory cortex of the adolescent rat:an in vitro biocytin study
- pmid
- 10195309
- title
- Connectivity in the somatosensory cortex of the adolescent rat: an in vitro biocytin study.
- contact Name
- J.F. Staiger
- contributed by
- MPG
- checked by
- SR
consistent - Knox CA - Effects of aging and chronic arterial hypertension on the cell populations in the neocortex and archicortex of the rat.
- input/validation/consistent
- consistent
- evaluation criterion
- ballpark estimates of number & density of neurons in a single column in V1
- id
- 2
- species
- rat
- age
- adult
- brain region
- V1
- layer
- 1 to 6
- cell
- pc & in
- aspect
- columnar and laminar cell density
- key result(s)
- Number and density of neurons in a single neocortical column
- pmid
- 7064663
- title
- Effects of aging and chronic arterial hypertension on the cell populations in the neocortex and archicortex of the rat.
- contact Name
- Knox CA
- contributed by
- SR
- checked by
- SR
consistent - Dirk Feldmeyer - Excitatory neuronal connectivity in barrel cortex
- input/validation/consistent
- consistent
- evaluation criterion
- VPm & PoM projection patterns
- id
- 3
- species
- rat
- age
- brain region
- barrel cortex
- layer
- cell
- aspect
- connectivity
- key result(s)
- provides summary and schematics of columns in barrel cortex
- pmid
- 22798946
- title
- Excitatory neuronal connectivity in barrel cortex
- contact Name
- Dirk Feldmeyer
- contributed by
- Yihwa Kim
- checked by
- SR
consistent - Herbert P. Killackey - Individual axon morphology and thalamocortical topography in developing rat somatosensory cortex
- input/validation/consistent
- consistent
- evaluation criterion
- thalamocortical innervation pattern
- id
- 4
- species
- rat
- age
- P1,P7
- brain region
- somatosensory cortex
- layer
- L5,L4
- cell
- aspect
- morphology and thalamocortical topography
- key result(s)
- Over the ensuing week, axons generate more branches within layer IV, but the tangential extent of individual axon arbors does not exceed the width of a barrel. By P7, individual axons overlap within barrel clusters, and individual axons span the width of a cluster.
- pmid
- 8867282
- title
- Individual axon morphology and thalamocortical topography in developing rat somatosensory cortex
- contact Name
- Herbert P. Killackey
- contributed by
- Y. Shi
- checked by
- SR
consistent - Moritz Helmstaedter, Bert Sakmann and Dirk Feldmeyer - Inhibitory interneurons in a cortical column form hot zones of inhibition in layers 2 and 5A.
- input/validation/consistent
- consistent
- evaluation criterion
- laminar distribution pattern of excitatory and inhibitory neurons
- id
- 5
- species
- rat
- age
- P25-36
- brain region
- barrel cortex
- layer
- 2, 5A
- cell
- interneurons and PCs
- aspect
- interneuron connectivity and density counts
- key result(s)
- a column contains ∼2,200 INs (11.5% of ∼19,000 neurons), almost a factor of 2 less than previously estimated. The density of GABAergic neurons was inhomogeneous between layers, with peaks in the upper third of L2/3 and in L5A.
- pmid
- 21949377
- title
- Inhibitory interneurons in a cortical column form hot zones of inhibition in layers 2 and 5A.
- contact Name
- Moritz Helmstaedter, Bert Sakmann and Dirk Feldmeyer
- contributed by
- Shruti
- checked by
- SR
consistent - Joachim Luebke - Morphometric analysis of the columnar innervation domain of neurons connecting layer 4 and layer 2/3 of juvenile rat barrel cortex
- input/validation/consistent
- consistent
- evaluation criterion
- convergence-divergence ratios of L4SSs and L2/3 PCs
- id
- 6
- species
- rat
- age
- brain region
- barrel cortex
- layer
- L2/3, L4
- cell
- Spiny (L4), pyramidal (L2/3)
- aspect
- key result(s)
- anatomical and functional connectivity between L4 spiny cells and L2/3 pyramidal cells
- pmid
- 12967922
- title
- Morphometric analysis of the columnar innervation domain of neurons connecting layer 4 and layer 2/3 of juvenile rat barrel cortex
- contact Name
- Joachim Luebke
- contributed by
- Yihwa Kim
- checked by
- SR
consistent - Dirk Feldmeyer - Morphometric Analysis of the Columnar Innervation Domain of Neurons Connecting Layer 4 and Layer 2/3 of Juvenile Rat Barrel Cortex
- input/validation/consistent
- consistent
- evaluation criterion
- convergence-divergence of L4Exc - L4Exc and L4SS - L2/3PC connections
- id
- 7
- species
- rat
- age
- p19-25
- brain region
- barrel cortex
- layer
- 2/3,4
- cell
- PC
- aspect
- cortico-cortical projections
- key result(s)
- In the L4-to-L2/3 innervation domain a single L4 spiny neuron contacts ~300–400 pyramidal cells while in the L4-to-L4 innervation domain it contacts ~200 other L4 spiny neurons. Similarly ~300–400 L4 spiny neurons converge onto a single pyramidal cell and ~200 L4 spiny neurons innervate another L4 spiny neuron.
- pmid
- 12967922
- title
- Morphometric Analysis of the Columnar Innervation Domain of Neurons Connecting Layer 4 and Layer 2/3 of Juvenile Rat Barrel Cortex
- contact Name
- Dirk Feldmeyer
- contributed by
- MR
- checked by
- SR
consistent - Rodney J. Douglas and Kevan A.C. Martin - Neuronal circuits of the neocortex
- input/validation/consistent
- consistent
- evaluation criterion
- dominant interactions between significant excitatory cell types in neocortex and their subcortical relations
- id
- 8
- species
- cat
- age
- brain region
- visual cortex
- layer
- cell
- aspect
- canonical circuit
- key result(s)
- to what extent can neocortical neurons and the circuits they form be considered as canonical?
- pmid
- 15217339
- title
- Neuronal circuits of the neocortex
- contact Name
- Rodney J. Douglas and Kevan A.C. Martin
- contributed by
- Yihwa Kim
- checked by
- SR
consistent - Beaulieu C - Numerical data on neocortical neurons in adult rat, with special reference to the GABA population.
- input/validation/consistent
- consistent
- evaluation criterion
- ballpark estimates for proportion, number & density of GABAergic neurons in a single column in parietal cortex (S1)
- id
- 9
- species
- rat
- age
- adult
- brain region
- pFC
- layer
- 1 to 6
- cell
- pc & in
- aspect
- columnar and laminar cell density
- key result(s)
- Number and density of GABAergic interneurons
- pmid
- 8508310
- title
- Numerical data on neocortical neurons in adult rat, with special reference to the GABA population.
- contact Name
- Beaulieu C
- contributed by
- SR
- checked by
- SR
consistent - Y. Zilberter - Pyramidal cell communication within local networks in layer 2/3 of rat neocortex.
- input/validation/consistent
- consistent
- evaluation criterion
- convergence-divergence ratios of L2/3 PCs and BCs
- id
- 10
- species
- rat
- age
- p14-p16
- brain region
- visual- and somatosensory
- layer
- L2/3
- cell
- PC
- aspect
- cortico-cortical projections / P
- key result(s)
- Input map into L2/3 PCs. Distance dependent conenction propability. "an individual pyramidal cell receives synaptic inputs from about 30 other pyramidal neurons; The probability of connection decreased from 0.09 to 0.01 with intercell distance (over the range 25–200 μm); excitatory and inhibitory connections between pyramidal cells and FS interneurons decreased only slightly with distance, being in the range 0.5–0.75"
- pmid
- 12813147
- title
- Pyramidal cell communication within local networks in layer 2/3 of rat neocortex.
- contact Name
- Y. Zilberter
- contributed by
- MR
- checked by
- SR
consistent - Killackey HP - Terminal arbors of axons projecting to the somatosensory cortex of the adult rat. I. The normal morphology of specific thalamocortical afferents.
- input/validation/consistent
- consistent
- evaluation criterion
- Thalamocortical afferents in layer 1
- id
- 11
- species
- rat
- age
- adult
- brain region
- somatosensory neocortex
- layer
- L5 L6
- cell
- aspect
- distribution of these terminal arbors support the hypothesis that the layer IV plexus of a single specific thalamocortical afferent tends to fill a vibrissae-related cluster
- key result(s)
- the organization of specific thalamocortical afferents may be responsible for clustered organization within the somatotopic map of the rodent neocortex.
- pmid
- 3316525
- title
- Terminal arbors of axons projecting to the somatosensory cortex of the adult rat. I. The normal morphology of specific thalamocortical afferents.
- contact Name
- Killackey HP
- contributed by
- Mirjia Herzog
- checked by
- SR
consistent - Masanori Matsuzaki - Three-Dimensional Mapping of Unitary Synaptic Connections by Two-Photon Macro Photolysis of Caged Glutamate
- input/validation/consistent
- consistent
- evaluation criterion
- L2/3 PC convergence-divergence estimates
- id
- 12
- species
- rat
- age
- p15-p19
- brain region
- visual cortex
- layer
- L2/3
- cell
- PC
- aspect
- cortico-cortical projections
- key result(s)
- high resolution map of inputs L4->L2/3, L2/3->L2/3; profile of distance dependent connection strength (EPSC)
- pmid
- 18216227
- title
- Three-Dimensional Mapping of Unitary Synaptic Connections by Two-Photon Macro Photolysis of Caged Glutamate
- contact Name
- Masanori Matsuzaki
- contributed by
- MR
- checked by
- SR
consistent - M Matsuzaki - Three-dimensional mapping of unitary synaptic connections by two-photon macro photolysis of caged glutamate.
- input/validation/consistent
- consistent
- evaluation criterion
- convergence of afferent excitatory inputs on a single L2/3PC
- id
- 13
- species
- rat
- age
- p15-p19
- brain region
- primary visual cortex
- layer
- 2,3
- cell
- PC
- aspect
- synaptic connectivity
- key result(s)
- mapping connectivity between layer 23 PC neurons
- pmid
- 18216227
- title
- Three-dimensional mapping of unitary synaptic connections by two-photon macro photolysis of caged glutamate.
- contact Name
- M Matsuzaki
- contributed by
- Julian Shillcock
- checked by
- SR
consistent - Peters A -
- input/validation/consistent
- consistent
- evaluation criterion
- ballpark estimates of number & density of neurons in a single column in V1
- id
- 14
- species
- rat
- age
- adult
- brain region
- V1
- layer
- 1 to 6
- cell
- pc & in
- aspect
- columnar and laminar cell density
- key result(s)
- Number and density of neurons in neocortex
- pmid
- (book chapter)
- title
- contact Name
- Peters A
- contributed by
- SR
- checked by
- SR
inconsistent - Cragg K - The density of synapses and neurones in the motor and visual areas of the cerebral cortex.
- input/validation/consistent
- inconsistent
- evaluation criterion
- lower ballpark numbers for no. & density of neurons in a single column in V1 - it must be noted that this paper was published nearly 50 years ago and the techniques that were used have significantly improved over the years
- id
- 15
- species
- mouse
- age
- adult
- brain region
- M1/V1
- layer
- 1 to 6
- cell
- pc & in
- aspect
- columnar and laminar cell density
- key result(s)
- Number and density of neurons in neocortex
- pmid
- 4964696
- title
- The density of synapses and neurones in the motor and visual areas of the cerebral cortex.
- contact Name
- Cragg K
- contributed by
- SR
- checked by
- SR
not applicable - Marcel Oberlaender - Automated three-dimensional detection and counting of neuron somata.
- input/validation/consistent
- not applicable
- evaluation criterion
- Methods paper to automatically count neuronal somata
- id
- 16
- species
- rat
- age
- -
- brain region
- Somato-sensory cortex
- layer
- all
- cell
- neurons
- aspect
- cell labelling and counting
- key result(s)
- Automated three dimensional detection and counting of neuron somata
- pmid
- 19427542
- title
- Automated three-dimensional detection and counting of neuron somata.
- contact Name
- Marcel Oberlaender
- contributed by
- Rajnish
- checked by
- SR
not applicable - Francisco Clasca - Embryonic and postnatal development of the layer I-directed ("matrix") thalamocortical system in the rat.
- input/validation/consistent
- not applicable
- evaluation criterion
- not applicable - embryonic and postnatal development of thalamocortical axons
- id
- 17
- species
- rat
- age
- fetal (E16-22) and postnatal (P0-P30)
- brain region
- S1
- layer
- thalamus to cortex
- cell
- NA
- aspect
- innervation pathway
- key result(s)
- A large population of thalamocortical cells, the ‘‘matrix’’ (M-type) cells, provides a direct robust input to layer I that is anatomically and functionally different from the thalamocortical input to layer VI. The developmental timecourse of M-type axons is examined here in rats aged E (embryonic day) 16 to P (postnatal day) 30.
- pmid
- 17517678
- title
- Embryonic and postnatal development of the layer I-directed ("matrix") thalamocortical system in the rat.
- contact Name
- Francisco Clasca
- contributed by
- Shruti
- checked by
- SR
not applicable - Marx M, Guenter RH, Hucko W, Radnikow G, Feldmeyer D. - Improved biocytin labeling and neuronal 3Dreconstruction
- input/validation/consistent
- not applicable
- evaluation criterion
- Methods paper for improved biocytin reconstructions
- id
- 18
- species
- rat and mouse
- age
- brain region
- layer
- various
- cell
- neurons
- aspect
- biocytin labeling of neuronal tissue and diaminobenzidine (DaB)-based processing of brain slices
- key result(s)
- reliable protocol for biocytin labeling of neuronal tissue and diaminobenzidine (DaB)-based processing of brain slices
- pmid
- 22301777
- title
- Improved biocytin labeling and neuronal 3Dreconstruction
- contact Name
- Marx M, Guenter RH, Hucko W, Radnikow G, Feldmeyer D.
- contributed by
- Mirjia Herzog
- checked by
- SR
not applicable - Nedivi, E - Structural basis for the role of inhibition in facilitating adult brain plasticity.
- input/validation/consistent
- not applicable
- evaluation criterion
- not applicable - characterization of deprivation induced plasticity
- id
- 19
- species
- mouse
- age
- adult
- brain region
- V1
- layer
- L2/3
- cell
- PC
- aspect
- Structural plasticity
- key result(s)
- Therapeutic approaches that reduce inhibition, when combined with an instructive stimulus, could facilitate restructuring of mature circuits impaired by damage or disease, improving function and perhaps enhancing cognitive abilities.
- pmid
- 21478885
- title
- Structural basis for the role of inhibition in facilitating adult brain plasticity.
- contact Name
- Nedivi, E
- contributed by
- SR
- checked by
- SR
not implemented - Connors, BW - Backward cortical projections to primary somatosensory cortex in rats extend long horizontal axons in layer I.
- input/validation/consistent
- not implemented
- evaluation criterion
- long range horizontal axons in layer 1
- id
- 20
- species
- rat
- age
- adult
- brain region
- S1
- layer
- L1
- cell
- likely exc. neurons with terminal axons in L1
- aspect
- Intracortical projections
- key result(s)
- Injections of the anterograde tracer dextran amine at the same site as the SI surface application labeled dense fiber terminations in middle layers of these same secondary areas in the primary motor cortex (MI) or SII in the midst of cells labeled by retrograde transport from layer I of SI. Injections of dextran amine into these secondary cortical areas labeled fibers that coursed through deep layers to SI, where they ascended to layer I. These reciprocal corticocortical inputs to SI were concentrated in layer I, where they branched and extended horizontally across several SI barrels
- pmid
- 9453672
- title
- Backward cortical projections to primary somatosensory cortex in rats extend long horizontal axons in layer I.
- contact Name
- Connors, BW
- contributed by
- SR
- checked by
- SR
not implemented - martin Deschenes - Corticothalamic projections from the cortical barrel field to the somatosensory thalamus in rats: a single-fibre study using biocytin as an anterograde tracer.
- input/validation/consistent
- not implemented
- evaluation criterion
- Corticothalamic projections are currently not implemented
- id
- 21
- species
- rat
- age
- adult
- brain region
- S1
- layer
- L5 L6
- cell
- neurons
- aspect
- cell labelling and projections
- key result(s)
- barrel field / Corticothalamic
- pmid
- 7711933
- title
- Corticothalamic projections from the cortical barrel field to the somatosensory thalamus in rats: a single-fibre study using biocytin as an anterograde tracer.
- contact Name
- martin Deschenes
- contributed by
- J-P
- checked by
- SR
not implemented - Sherman, S - Corticothalamic projections from the rat primary somatosensory cortex.
- input/validation/consistent
- not implemented
- evaluation criterion
- Corticothalamic projections are currently not implemented
- id
- 22
- species
- rat
- age
- brain region
- somatosensory cx/ventral posterior nucleus/posterior medial nucleus
- layer
- cell
- aspect
- Innervation pathway
- key result(s)
- Ventral posterior nucleus receives innervation only from Layer 5a cortex/ posterior medial nucleus receives input only from layer 5b, 6a and b
- pmid
- 12917373
- title
- Corticothalamic projections from the rat primary somatosensory cortex.
- contact Name
- Sherman, S
- contributed by
- Melissa
- checked by
- SR
not implemented - Daiki Kamatani - Experience-dependent formation of activity propagation patterns at the somatosensory S1 and S2 boundary in rat cortical slices.
- input/validation/consistent
- not implemented
- evaluation criterion
- long range connections from S1 to S2
- id
- 23
- species
- rat
- age
- 3 - 6 weeks
- brain region
- S1 and S2
- layer
- ayer IV and layer V
- cell
- pyramidal neurons
- aspect
- experience-dependent formation of activity propagation patterns in the somatosensory cortex.
- key result(s)
- The dominant activity propagation pattern from S1 to S2 was not affected by antagonists of glutamate or GABA(A) receptors. Ca(2+) imaging and electrophysiological recordings confirmed the anisotropic activity propagation pattern.
- pmid
- 17234433
- title
- Experience-dependent formation of activity propagation patterns at the somatosensory S1 and S2 boundary in rat cortical slices.
- contact Name
- Daiki Kamatani
- contributed by
- Mirjia Herzog
- checked by
- SR
not implemented - ZACHARY S. HOFFER, HENRY B. ARANTES, RICHARD L. ROTH, AND KEVIN D. ALLOWAY - Functional Circuits Mediating Sensorimotor Integration: Quantitative Comparisons of Projections from Rodent Barrel Cortex to Primary Motor Cortex, Neostriatum, Superior Colliculus, and the Pons
- input/validation/consistent
- not implemented
- evaluation criterion
- long range connections from S1 to subcortical areas
- id
- 24
- species
- rat
- age
- adult
- brain region
- barrel cortex, motor cortex, neostriatum, superior colliculus, pons
- layer
- cell
- aspect
- projections
- key result(s)
- connection between barrel cortex and other areas of the brain
- pmid
- 15912501
- title
- Functional Circuits Mediating Sensorimotor Integration: Quantitative Comparisons of Projections from Rodent Barrel Cortex to Primary Motor Cortex, Neostriatum, Superior Colliculus, and the Pons
- contact Name
- ZACHARY S. HOFFER, HENRY B. ARANTES, RICHARD L. ROTH, AND KEVIN D. ALLOWAY
- contributed by
- Yihwa Kim
- checked by
- SR
not implemented - Petersen Carl - Long-range connectivity of mouse primary somatosensory barrel cortex.
- input/validation/consistent
- not implemented
- evaluation criterion
- long range connections from S1 to subcortical areas
- id
- 25
- species
- mouse
- age
- brain region
- barrel cortex
- layer
- 1 to 6
- cell
- projection neurons
- aspect
- projections
- key result(s)
- Long range projections ob mouse barrel cortex
- pmid
- 20550566
- title
- Long-range connectivity of mouse primary somatosensory barrel cortex.
- contact Name
- Petersen Carl
- contributed by
- J-P
- checked by
- SR
possibly consistent - Binzegger, T - A quantitative map of the circuit of cat primary visual cortex
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - number fo afferent neurons per mtype the average number of boutons & the average number of synapses that mtypes form in each layer
- id
- 26
- species
- cat
- age
- brain region
- visual cortex
- layer
- cell
- aspect
- connectivity
- key result(s)
- a quantitative description of connectivity patterns in cat visual cortex
- pmid
- 15456817
- title
- A quantitative map of the circuit of cat primary visual cortex
- contact Name
- Binzegger, T
- contributed by
- Yihwa Kim
- checked by
- SR
possibly consistent - Suzana Herculano-Houzel - Changing numbers of neuronal and non-neuronal cells underlie postnatal brain growth in the rat.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - neuronal density in cortex
- id
- 27
- species
- mouse, rat, hamster, guniea pig, agoutis and capybaras
- age
- adult
- brain region
- cerebral cortex, cerebellum, sub-cortical structures
- layer
- cell
- aspect
- scaling rules for rodent brains
- key result(s)
- in the order Rodentia, increased size of the cerebral cortex, cerebellum, and remaining areas across six species is achieved through greater numbers of neurons of larger size, and much greater numbers of nonneuronal cells of roughly invariant size, such that the ratio between total neuronal and nonneuronal mass remains constant across species. MOTE: separate scaling laws exist for monekys and apes, such that a human or moneky brain cannot simply be considered a scaled up rodent brain!
- pmid
- 19666520
- title
- Changing numbers of neuronal and non-neuronal cells underlie postnatal brain growth in the rat.
- contact Name
- Suzana Herculano-Houzel
- contributed by
- J. Ryge
- checked by
- SR
possibly consistent - Suzana Herculano-Houzel - Changing numbers of neuronal and non-neuronal cells underlie postnatal brain growth in the rat.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - neuronal density in the entire cerebral cortex
- id
- 28
- species
- Rat
- age
- P0, P5, P10, P15, P20, P25, P30, P35, P45, P55, P65, P75, P85, P95
- brain region
- Cortex, hipocampus, cerebelum, olfactory bulp, rest of brain
- layer
- NA
- cell
- Neuron, glia
- aspect
- post natal development of the brain
- key result(s)
- We find that at birth, >90% of the cells in the rat brain are neurons. Following a dormant period of 3 days after birth, the net number of neurons in the cerebral cortex, hippocampus, and remaining tissue (excluding cerebellum and olfactory bulb) doubles during the first week, then is reduced by 70% during the second postnatal week, concurrently with net gliogenesis. A second round of net addition of 6 million neurons is observed in the cerebral cortex over the following 2 weeks. Thus at P14 there is still a lot of post natal development and maturation going on.
- pmid
- 19666520
- title
- Changing numbers of neuronal and non-neuronal cells underlie postnatal brain growth in the rat.
- contact Name
- Suzana Herculano-Houzel
- contributed by
- J. Ryge
- checked by
- SR
possibly consistent - Delaine D Larson - Development of layer-specific axonal arborizations in mouse primary somatosensory cortex.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - total axon length
- id
- 29
- species
- mouse
- age
- p7-p21
- brain region
- S1
- layer
- L2-3 L5
- cell
- pyramidal neurons
- aspect
- axon deveopment
- key result(s)
- pattern of axon arborization
- pmid
- 16320250
- title
- Development of layer-specific axonal arborizations in mouse primary somatosensory cortex.
- contact Name
- Delaine D Larson
- contributed by
- J-P
- checked by
- SR
possibly consistent - Burkhalter, A - Differential subcellular localization of forward and feedback interareal inputs to parvalbumin expressing GABAergic neurons in rat visual cortex.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - number of synaptic contacts on PV +ve neurons across all layers
- id
- 30
- species
- rat
- age
- adult
- brain region
- V1
- layer
- L2/3
- cell
- PV+ neurons
- aspect
- Subcellular localization of feedforward and feedback inputs
- key result(s)
- Our results show that PV neurons provide a major target for area 17 lateromedial forward and feedback pathways terminating in upper layers. In each pathway, the proportion of axons contacting PV neurons is similar. However, both pathways differ in the subcellular localization and morphology of synapses on PV neurons.
- pmid
- 10102500
- title
- Differential subcellular localization of forward and feedback interareal inputs to parvalbumin expressing GABAergic neurons in rat visual cortex.
- contact Name
- Burkhalter, A
- contributed by
- SR
- checked by
- SR
possibly consistent - Karel Svoboda - Geometric and functional organization of cortical circuits
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - connection strengths of L4, L2/3 and L5 projections
- id
- 31
- species
- rat
- age
- brain region
- barrel cortex
- layer
- 2/3,4,5
- cell
- PC
- aspect
- cortico-cortical projections
- key result(s)
- Relative strengths of projections from L4 and L5 to L2/3
- pmid
- 15880111
- title
- Geometric and functional organization of cortical circuits
- contact Name
- Karel Svoboda
- contributed by
- MR
- checked by
- SR
possibly consistent - White, EL - Intrinsic circuitry involving the local axon collaterals of corticothalamic projection cells in mouse SmI cortex.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - synaptic locations and density
- id
- 32
- species
- mouse
- age
- adult
- brain region
- S1
- layer
- 1 to 6
- cell
- pc & in
- aspect
- cortico-thalamic projections
- key result(s)
- A triadic relationship involving afferent input and populations of CT projection and intrinsic neurons is a basic feature of the synaptic organization of the cerebral cortex
- pmid
- 3624546
- title
- Intrinsic circuitry involving the local axon collaterals of corticothalamic projection cells in mouse SmI cortex.
- contact Name
- White, EL
- contributed by
- SR
- checked by
- SR
possibly consistent - White, EL - Intrinsic circuitry: synapses involving the local axon collaterals of corticocortical projection neurons in the mouse primary somatosensory cortex.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - synaptic locations and density
- id
- 33
- species
- mouse
- age
- adult
- brain region
- S1
- layer
- 1 to 6
- cell
- pc & in
- aspect
- cortico-cortical projections
- key result(s)
- The distribution of asymmetical synapses onto spines and dendritic shafts was analyzed for neuropil in layers III, IV, and V. Depending on the layer, from 34 to 46% of the asymmetrical synapses in the neuropil were onto dendritic shafts
- pmid
- 2298929
- title
- Intrinsic circuitry: synapses involving the local axon collaterals of corticocortical projection neurons in the mouse primary somatosensory cortex.
- contact Name
- White, EL
- contributed by
- SR
- checked by
- SR
possibly consistent - Karel Svoboda - Laminar and columnar organization of ascending excitatory projections to layer 2/3 pyramidal neurons in rat barrel cortex.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - connection strengths of L4, L2/3 and L5 projections
- id
- 34
- species
- rat
- age
- p25-p30
- brain region
- barrel cortex
- layer
- L2/3
- cell
- PC
- aspect
- cortico-cortical projections / P
- key result(s)
- Input map (P, strength) into L2/3 PCs
- pmid
- 15958733
- title
- Laminar and columnar organization of ascending excitatory projections to layer 2/3 pyramidal neurons in rat barrel cortex.
- contact Name
- Karel Svoboda
- contributed by
- MR
- checked by
- SR
possibly consistent - V. B. Mountcastle - Modality and topographic properties of single neurons of cat's somatic sensory cortex.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - distribution in depth of cortical neurons
- id
- 35
- species
- Cat
- age
- -
- brain region
- somato-sensory cortex
- layer
- 1 to 6
- cell
- all
- aspect
- 1957 first description of cortical columnar organization
- key result(s)
- Cortical columnar organization
- pmid
- 13439410
- title
- Modality and topographic properties of single neurons of cat's somatic sensory cortex.
- contact Name
- V. B. Mountcastle
- contributed by
- Rajnish
- checked by
- SR
possibly consistent - Ingrid Bureau, Gordon M.G. Shepherd, and Karel Svoboda* - Precise Development of Functional and Anatomical Columns in the Neocortex
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - connectivity of L4SSs and L2/3PCs
- id
- 36
- species
- rat
- age
- brain region
- somatosensory
- layer
- L2,3,4
- cell
- aspect
- column
- key result(s)
- development of cortical column in rat somatosensory cortex in terms of receptive field and dendritic axonal projection
- pmid
- 15182718
- title
- Precise Development of Functional and Anatomical Columns in the Neocortex
- contact Name
- Ingrid Bureau, Gordon M.G. Shepherd, and Karel Svoboda*
- contributed by
- Yihwa Kim
- checked by
- SR
possibly consistent - Burkhalter, A - Rearrangement of synaptic connections with inhibitory neurons in developing mouse visual cortex.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - proportion & density of PV+ve neurons across all layers
- id
- 37
- species
- mouse
- age
- adult
- brain region
- V1
- layer
- L2/3
- cell
- PV+ neurons
- aspect
- innervation ratio of PV+ and non PV+ neurons
- key result(s)
- We found that the innervation ratio of PV and non-PV neurons is mature at P15. Furthermore, the size distributions of PV dendrites contacted by feedforward and feedback synapses were similar at P15 but changed during the third to sixth postnatal weeks so that, by P36–42, feedforward inputs preferred thick dendrites and ffedback synapses favored thin PV dendrites.
- pmid
- 12900914
- title
- Rearrangement of synaptic connections with inhibitory neurons in developing mouse visual cortex.
- contact Name
- Burkhalter, A
- contributed by
- SR
- checked by
- SR
possibly consistent - Sakmann B - Reconstruction of an average cortical column in silico.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - convergence, divergence ratios of mtypes
- id
- 38
- species
- rat
- age
- -
- brain region
- barrel cortex
- layer
- 1 to 6
- cell
- neurons
- aspect
- Anatomical and functional connectivity and cortical column in silico
- key result(s)
- Synthesis of an average functional column
- pmid
- 17822776
- title
- Reconstruction of an average cortical column in silico.
- contact Name
- Sakmann B
- contributed by
- Rajnish
- checked by
- SR
possibly consistent - White, EL - Synapses made by axons of callosal projection neurons in mouse somatosensory cortex: emphasis on intrinsic connections.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - synaptic locations and density
- id
- 39
- species
- mouse
- age
- adult
- brain region
- S1
- layer
- 1 to 6
- cell
- pc & in
- aspect
- cortico-cortical projections
- key result(s)
- quantitative studies of the synaptic connectivities of both extrinsic and intrinsic axonal pathways in the cortex
- pmid
- 2013638
- title
- Synapses made by axons of callosal projection neurons in mouse somatosensory cortex: emphasis on intrinsic connections.
- contact Name
- White, EL
- contributed by
- SR
- checked by
- SR
possibly consistent - White, EL - Synaptic connections of callosal projection neurons in the vibrissal region of mouse primary motor cortex: an electron microscopic/horseradish peroxidase study.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation - synaptic locations and density
- id
- 40
- species
- mouse
- age
- adult
- brain region
- S1
- layer
- 1 to 6
- cell
- pc
- aspect
- callosal afferents
- key result(s)
- Segments of apical dendrites belonging to layer V and layer II/III neurons course through neuropil containing nearly the same concentration of degenerating callosal terminals, but the layer V cells form fewer callosal synapses
- pmid
- 3013951
- title
- Synaptic connections of callosal projection neurons in the vibrissal region of mouse primary motor cortex: an electron microscopic/horseradish peroxidase study.
- contact Name
- White, EL
- contributed by
- SR
- checked by
- SR
possibly consistent - LA krubitzer - The emergence of somatotopic maps of the body in S1 in rats: the correspondence between functional and anatomical organization.
- input/validation/consistent
- possibly consistent
- evaluation criterion
- pending evaluation
- id
- 41
- species
- rat
- age
- juvenile p5-p20
- brain region
- S1
- layer
- cortical surface
- cell
- none
- aspect
- topographic maps
- key result(s)
- before p15 the somoatotopic organization is incomplete and barrels take up most of cortical space
- pmid
- 22393398
- title
- The emergence of somatotopic maps of the body in S1 in rats: the correspondence between functional and anatomical organization.
- contact Name
- LA krubitzer
- contributed by
- J-P
- checked by
- SR
possibly consistent - Stepanyants, A. - The fractions of short- and long-range connections in the visual cortex
- input/validation/consistent
- possibly consistent
- evaluation criterion
- id
- 42
- species
- cat
- age
- adult
- brain region
- area 17
- layer
- cell
- PC
- aspect
- cortico-cortical projections
- key result(s)
- extrinsic connections to cortex >70% of excitation comes from outside a 500 um radius column around a cell
- pmid
- 19221032
- title
- The fractions of short- and long-range connections in the visual cortex
- contact Name
- Stepanyants, A.
- contributed by
- MR
- checked by
- SR