Pharmacological approach to the visual cortex

Abstract Much of the neuronal processing of visual information which takes place relies on inhibitory pathways. The principal neurotransmitter in this system is probably γ-aminobutyric acid (GABA). The pharmacologist has been able to provide a specific blocker to this transmitter, in the form of bicuculline, which has been used to elaborate a number of the modulatory and processing functions of the inhibitory pathways.