Fiber-of-passage ( Cajal, 1894a ) : Segment of a nerve fiber (Ehrenberg, 1833) that passes through a gray matter region or a white matter tract without forming synapses (Foster & Sherrington, 1897); used by Cajal at least as early as 1894 (1894a, p. 173). Also see axon-of-passage and Cowan et al. (1972, p. 38).

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