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Patterns of excitation and inhibition evoked by horizontal connections in visual cortex share a common relationship to orientation columns.

Publication ,  Journal Article
Weliky, M; Kandler, K; Fitzpatrick, D; Katz, LC
Published in: Neuron
September 1995

Combined optical imaging and electrophysiological techniques were used to assess directly the functional nature of long-range excitatory and inhibitory synaptic interactions between orientation columns in area 17 of ferret visual cortex. A significant correlation was found between the layout of iso-orientation columns and the pattern of evoked synaptic inputs between cortical sites: the largest-amplitude inhibitory and excitatory synaptic responses were evoked in single neurons when stimulation and recording electrodes were located in orientation columns sharing the same angle preference. Both excitatory and inhibitory synaptic responses decreased in amplitude when stimulation and recording electrodes were located in orientation columns with orthogonal angle preferences. Changing the stimulus intensity altered the balance of evoked excitation and inhibition without changing the columnar specificity of inputs. These results directly demonstrate that horizontal connections modulate both excitatory and inhibitory synaptic interactions between iso-orientation columns.

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Published In

Neuron

DOI

ISSN

0896-6273

Publication Date

September 1995

Volume

15

Issue

3

Start / End Page

541 / 552

Location

United States

Related Subject Headings

  • Visual Cortex
  • Synapses
  • Patch-Clamp Techniques
  • Neurons
  • Neurology & Neurosurgery
  • Microspheres
  • Fluorescent Dyes
  • Ferrets
  • Evoked Potentials
  • Electrophysiology
 

Citation

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Weliky, M., Kandler, K., Fitzpatrick, D., & Katz, L. C. (1995). Patterns of excitation and inhibition evoked by horizontal connections in visual cortex share a common relationship to orientation columns. Neuron, 15(3), 541–552. https://doi.org/10.1016/0896-6273(95)90143-4
Weliky, M., K. Kandler, D. Fitzpatrick, and L. C. Katz. “Patterns of excitation and inhibition evoked by horizontal connections in visual cortex share a common relationship to orientation columns.Neuron 15, no. 3 (September 1995): 541–52. https://doi.org/10.1016/0896-6273(95)90143-4.
Weliky, M., et al. “Patterns of excitation and inhibition evoked by horizontal connections in visual cortex share a common relationship to orientation columns.Neuron, vol. 15, no. 3, Sept. 1995, pp. 541–52. Pubmed, doi:10.1016/0896-6273(95)90143-4.
Journal cover image

Published In

Neuron

DOI

ISSN

0896-6273

Publication Date

September 1995

Volume

15

Issue

3

Start / End Page

541 / 552

Location

United States

Related Subject Headings

  • Visual Cortex
  • Synapses
  • Patch-Clamp Techniques
  • Neurons
  • Neurology & Neurosurgery
  • Microspheres
  • Fluorescent Dyes
  • Ferrets
  • Evoked Potentials
  • Electrophysiology