X and Y cells in the lateral geniculate nucleus of macaque monkeys.

摘要: 1. Cells of the lateral geniculate nucleus (l.g.n.) in macaque monkeys were sorted into two functional groups on basis spatial summation visually evoked neural signals. 2. called X cells if their responses to contrast reversal fine sine gratings at fundamental temporal modulation frequency with null positions one quarter a cycle away from for peak response. Y such stimuli twice and approximately independent phase. 3. Ninety-nine percent four dorsal parvocellular layers l.g.n. cells; about seventy-five ventral magnocellular also cells. The remainder 4. We confirmed previous findings that had shorter latency response electrical stimulation optic chiasm. 5. Magnocellular much higher sensitivities than did 6. Therefore, distinct classes exist l.g.n.: great difference properties suggests they have different functions vision. form third group distinctly 7. propose monkey's may be homologous A A1 cat's