Orientation selectivity in cat primary visual cortex: local and global measurement
نویسندگان
چکیده
منابع مشابه
Orientation selectivity of synaptic input to neurons in mouse and cat primary visual cortex.
Primary visual cortex (V1) is the site at which orientation selectivity emerges in mammals: visual thalamus afferents to V1 respond equally to all stimulus orientations, whereas their target V1 neurons respond selectively to stimulus orientation. The emergence of orientation selectivity in V1 has long served as a model for investigating cortical computation. Recent evidence for orientation sele...
متن کاملOrientation selectivity of synaptic potentials in neurons of cat primary visual cortex.
Neurons of the visual cortex of the cat were penetrated with intracellular electrodes and postsynaptic potentials evoked by visual stimuli recorded. By alternately polarizing the cell with steady current injected through the recording electrode, IPSPs and EPSPs could be recorded and analyzed independently. Hyperpolarizing current suppressed IPSPs and enhanced EPSPs by moving the membrane potent...
متن کاملGABA-mediated inhibition correlates with orientation selectivity in primary visual cortex of cat.
Orientation selectivity is an important emergent property of neurons in the primary visual cortex, and inhibition is thought to play an important role in establishing this selectivity. But the relationship between strength of inhibition and orientation selectivity is unclear. To investigate this relationship, we electrophoretically applied the inhibitory transmitter GABA and the GABA(A) antagon...
متن کاملMechanisms of Orientation Selectivity in the Primary Visual Cortex.
The mechanisms underlying the emergence of orientation selectivity in the visual cortex have been, and continue to be, the subjects of intense scrutiny. Orientation selectivity reflects a dramatic change in the representation of the visual world: Whereas afferent thalamic neurons are generally orientation insensitive, neurons in the primary visual cortex (V1) are extremely sensitive to stimulus...
متن کاملLocal potential connectivity in cat primary visual cortex.
Time invariant description of synaptic connectivity in cortical circuits may be precluded by the ongoing growth and retraction of dendritic spines accompanied by the formation and elimination of synapses. On the other hand, the spatial arrangement of axonal and dendritic branches appears stable. This suggests that an invariant description of connectivity can be cast in terms of potential synaps...
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ژورنال
عنوان ژورنال: Neuroscience Bulletin
سال: 2015
ISSN: 1673-7067,1995-8218
DOI: 10.1007/s12264-014-1535-7