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December 1933

The Main Afferent Fiber Systems of the Cerebral Cortex in Primates. An Investigation of the Central Portions of the Somato-Sensory, Auditory, and Visual Paths of the Cerebral Cortex, with Consideration of Their Normal and Pathological Function, Based on Experiments with Monkeys.

Arch Ophthalmol. 1933;10(6):866-870. doi:10.1001/archopht.1933.00830070148019

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This fine monograph is a preliminary, and a necessary one, to a study of the comparatively little known association connections of various cortical areas as determined by cyto-architectural and myelo-architectural investigations.

To obtain results applicable to human physiology and pathology, the experiments were carried out on monkeys (Macacus rhesus, except in one case in which a Java monkey was used). The experiments consisted of interruptions of the afferent projection fiber systems at or near their origin from the diencephalon, thereby causing their partial or complete secondary degeneration, avoiding at the same time as far as possible other fiber systems. The secondarily degenerated fibers were traced to their respective terminations in the cortex, and the internal arrangements of the three afferent paths investigated (somatosensory, auditory and visual), the cortical areas in which they terminated and the finer relation of their fibers to the cortex were studied. The staining method used was

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