Effects of excitation and inactivation in area 17 on paired cells in area 18.
This investigation examines how neighboring neurons of area 18 react when area 17 inputs are excited or depressed. In anesthetized cats, area 18 responses to a sine-wave grating in the receptive field were analyzed, while a second grating was positioned in its periphery and responses were recorded in area 17. This latter site was also inactivated with GABA. A waveform template process sorted out at least two individual, neighboring cells with similar orientation preferences in area 18. These cells frequently displayed opposite reactions to stimulation and inactivation in area 17. Experiments suggest that nearby neurons belonging to the same functional domain in the visual cortex may simultaneously carry disparate information.
Tan
Y-F
YF
Département des Sciences Biologiques, Université de Montréal, Montréal, Canada.
Bretzner
F
F
Lepore
F
F
Itaya
S
S
Shumikhina
S
S
Molotchnikoff
S
S
D000200:Action Potentials / Q000502:physiology*; D000818:Animals; D002415:Cats; D004558:Electric Stimulation / Q000379:methods; D009474:Neurons / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology*