Author:
GRANDA A.M.,DEARWORTH J.R.,SUBRAMANIAM B.
Abstract
Receptive fields of retinal ganglion cells in turtle
have excitatory and inhibitory components that are balanced
along the dimensions of wavelength, functional ON and OFF
responses, and spatial assignments of center and surround.
These components were analyzed by spectral light adaptations
and by the glutamate agonist, 2-amino-4-phosphonobutyric
acid (APB). Extracellular recordings to stationary and
moving spots of light were used to map changes in receptive
fields. ON spike counts minus OFF spike counts, derived
from flashed stationary light spots, quantified
functional shifts by calculating normalized mean response
modulations. The data show that receptive fields are not
static, but rather are dynamic arrangements which depend
on linked, antagonistic balances among the three dimensions
of wavelength, ON and OFF response functions, and center/surround
areas.
Publisher
Cambridge University Press (CUP)
Subject
Sensory Systems,Physiology
Cited by
6 articles.
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