Temporal properties of inputs to direction-selective neurons in monkey V1

Alan B. Saul, Peter L. Carras, Allen L. Humphrey

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Motion in the visual scene is processed by direction-selective neurons in primary visual cortex. These cells receive inputs that differ in space and time. What are these inputs? A previous single-unit recording study in anesthetized monkey V1 proposed that the two major streams arising in the primate retina, the M and P pathways, differed in space and time as required to create direction selectivity. We confirmed that cortical cells driven by P inputs tend to have sustained responses. The M pathway, however, as assessed by recordings in layer 4Ca and from cells with high contrast sensitivity, is not purely transient. The diversity of timing in the M stream suggests that combinations of M inputs, as well as of M and P inputs, create direction selectivity.

Original languageEnglish (US)
Pages (from-to)282-294
Number of pages13
JournalJournal of Neurophysiology
Issue number1
StatePublished - Jul 2005

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology


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