The rabbit and the cat: A comparison of some features of response properties of single cells in the primary visual cortex

Journal of Comparative Neurology - Tập 188 Số 3 - Trang 401-427 - 1979
E. Hazel Murphy1, Nancy E.J. Berman1
1Departments of Anatomy and Physiology/Biochemistry, The Medical College of Pennsylvania, Philadephia, Pennsylvania 19129

Tóm tắt

Abstract

Receptive field characteristics of single cells in primary visual cortex of rabbit were studied. Seventy‐two percent of cells were found to be orientation selective, and the remainder had concentric, uniform, movement selective or pure direction selective receptive fields. Single cells were also recorded from primary visual cortex of cat to permit a comparison of visual cortical organization in cats and rabbits. Laminar organization of receptive field types was observed in rabbits which was similar in most respects to that described in the cat. Although the major categories of orientation selective cells (simple, complex, hypercomplex) were similar for both cat and rabbit, many differences emerged: (I) tuning of orientation selectivity was narrower in cats than in rabbits; (II) units which preferred oblique orientations were less frequently represented in rabbits than in cats; (III) orientation preferences appeared to be arranged in cluster in rabbit cortex; in rabbits we found no evidence of the columnar organization of orientation selectivity which characterizes cat visual cortex.

A comparison of our data with those previously reported for mouse, rat, hamster and opossum visual cortex suggest that mammals in which a significant proportion of visual cortical cells are not orientation selective have in common certain patterns of cortical organization involving a less precise and less specialized representation of stimulus orientation.

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