Temporal dynamics of visual category representation in the macaque inferior temporal cortex

Mohammad Reza A Dehaqani, Abdol Hossein Vahabie, Roozbeh Kiani, Majid Nili Ahmadabadi, Babak Nadjar Araabi, Hossein Esteky

Research output: Contribution to journalArticle

Abstract

Object categories are recognized at multiple levels of hierarchical abstractions. Psychophysical studies have shown a more rapid perceptual access to the mid-level category information (e.g., human faces) than the higher (superordinate; e.g., animal) or the lower (subordinate; e.g., face identity) level. Mid-level category members share many features, whereas few features are shared among members of different mid-level categories. To understand better the neural basis of expedited access to mid-level category information, we examined neural responses of the inferior temporal (IT) cortex of macaque monkeys viewing a large number of object images. We found an earlier representation of mid-level categories in the IT population and single-unit responses compared with superordinate- and subordinatelevel categories. The short-latency representation of mid-level category information shows that visual cortex first divides the category shape space at its sharpest boundaries, defined by high/low within/ between-group similarity. This short-latency, mid-level category boundary map may be a prerequisite for representation of other categories at more global and finer scales.

Original languageEnglish (US)
Pages (from-to)587-601
Number of pages15
JournalJournal of Neurophysiology
Volume116
Issue number2
DOIs
StatePublished - Aug 1 2016

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Macaca
Visual Cortex
Temporal Lobe
Haplorhini
Population

Keywords

  • Category representation
  • Hierarchical abstraction
  • Inferior temporal cortex
  • Object recognition
  • Temporal dynamics

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology
  • Medicine(all)

Cite this

Dehaqani, M. R. A., Vahabie, A. H., Kiani, R., Ahmadabadi, M. N., Araabi, B. N., & Esteky, H. (2016). Temporal dynamics of visual category representation in the macaque inferior temporal cortex. Journal of Neurophysiology, 116(2), 587-601. https://doi.org/10.1152/jn.00018.2016

Temporal dynamics of visual category representation in the macaque inferior temporal cortex. / Dehaqani, Mohammad Reza A; Vahabie, Abdol Hossein; Kiani, Roozbeh; Ahmadabadi, Majid Nili; Araabi, Babak Nadjar; Esteky, Hossein.

In: Journal of Neurophysiology, Vol. 116, No. 2, 01.08.2016, p. 587-601.

Research output: Contribution to journalArticle

Dehaqani, Mohammad Reza A ; Vahabie, Abdol Hossein ; Kiani, Roozbeh ; Ahmadabadi, Majid Nili ; Araabi, Babak Nadjar ; Esteky, Hossein. / Temporal dynamics of visual category representation in the macaque inferior temporal cortex. In: Journal of Neurophysiology. 2016 ; Vol. 116, No. 2. pp. 587-601.
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