THE NEURAL ORGANIZATION OF THE VISUAL PATHWAYS IN THE CAT.

Publisher Summary This chapter reviews the mammalian visual system and its central neural connections as well as considerable anatomical and physiological data derived from new, more refined experimental techniques. The chapter correlates these data with previous observations, and summarizes the results in a schema, which seems to represent best the presently recognized visual centers and their neural pathways. In the cat, the optic nerve is composed chiefly, and perhaps exclusively, of the axons of retinal ganglion cells. There is no agreement on the histological spectrum of optic nerve fibers. The complete origins of the supraoptic commissures are still largely unknown. The thalamic and midbrain connections of the two parts of the lateral geniculate nucleus are beginning to emerge, but these observations need confirmation and elaboration. The connections of the reticular formation with the visual system and the presence of centrifugal fibers to the retina in the cat remains equivocal and the efferent paths from the terminal nuclei of the accessory optic tract system are unknown.

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