Journal article

Multiple pathways carry signals from short-wavelength-sensitive ('blue') cones to the middle temporal area of the macaque

Jaikishan Jayakumar, Sujata Roy, Bogdan Dreher, Paul R Martin, Trichur R Vidyasagar

JOURNAL OF PHYSIOLOGY-LONDON | WILEY | Published : 2013

Abstract

We recorded spike activity of single neurones in the middle temporal visual cortical area (MT or V5) of anaesthetised macaque monkeys. We used flashing, stationary spatially circumscribed, cone-isolating and luminance-modulated stimuli of uniform fields to assess the effects of signals originating from the long-, medium- or short- (S) wavelength-sensitive cone classes. Nearly half (41/86) of the tested MT neurones responded reliably to S-cone-isolating stimuli. Response amplitude in the majority of the neurones tested further (19/28) was significantly reduced, though not always completely abolished, during reversible inactivation of visuotopically corresponding regions of the ipsilateral pri..

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