Development of inhibitory mechanisms in the kitten's visual cortex

The objective of this study was to evaluate the maturity of three inhibitory mechanisms (end-inhibition, side-inhibition, and cross-orientation inhibition) in the striate cortex of kittens at 4 weeks postnatal. To accomplish this, we made extracellular recordings from area 17 neurons while presentin...

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Bibliographic Details
Published in:Visual neuroscience 1996-11, Vol.13 (6), p.1109-1117
Main Authors: Green, Eric S., DeAngelis, Gregory C., Freeman, Ralph D.
Format: Article
Language:English
Subjects:
Action Potentials - physiology
Aging - physiology
Animals
Biological and medical sciences
Cat
Cats
Electrophysiology
Eye and associated structures. Visual pathways and centers. Vision
Fundamental and applied biological sciences. Psychology
Inhibition
Neurons - physiology
Vertebrates: nervous system and sense organs
Visual Cortex - growth & development
Visual Cortex - physiology
Visual development
Visual Perception - physiology
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Summary:The objective of this study was to evaluate the maturity of three inhibitory mechanisms (end-inhibition, side-inhibition, and cross-orientation inhibition) in the striate cortex of kittens at 4 weeks postnatal. To accomplish this, we made extracellular recordings from area 17 neurons while presenting visual stimuli consisting of sinusoidal luminance gratings or composites of gratings. We then compared data from kittens relating to various characteristics of each inhibitory mechanism with data from adults. We find that end-inhibition, side-inhibition, and cross-orientation inhibition are all present in kittens, and all show signs of maturity by 4 weeks postnatal. We conclude that the development of these inhibitory mechanisms occurs relatively early, and may coincide with the development of excitatory properties.
ISSN:0952-5238
1469-8714
DOI:10.1017/S0952523800007756