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Temporal integration in cat visual cortex: A test of bloch's law

Authors
Journal
Vision Research
0042-6989
Publisher
Elsevier
Publication Date
Volume
31
Issue
9
Identifiers
DOI: 10.1016/0042-6989(91)90129-s
Keywords
  • Cat
  • Temporal Summation
  • Critical Duration
  • Visual Cortex
  • Integration Time
  • Bloch'S Law

Abstract

Abstract Some units in the cat visual cortex fail to respond to a briefly flashed bar and it has been suggested that such neurons function as visual integrators with a long time constant. To test this integrator hypothesis, a study was made using presentations of a bar, flashed over the receptive field for various durations and at different luminances. Some cortical cells indeed showed an increase in the time to peak latency and in the response amplitude when stimulus duration was prolonged up to 320 msec. Such units obeyed Bloch's law for durations over 100 msec.

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