A New Spinal Pathway for Cutaneous Impulses

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Abstract
Evoked potentials following cutaneous stimulation were recorded in the sensory cortical areas prior and following cord incision. By selective lesions it was shown that fast cutaneous impulses ascend not only in dorsal funiculi but also in the ipsilateral lateral funiculus, in all probability in the dorsal spinocerebellar tract. Through collaterals of this tract, impulses are relayed to a nucleus of cervical cord (N. of spinocerebellar tract, Cajal) at the level of segments C1 and C2. Central connections of this nucleus, described in detail elsewhere, account for propagation of tactile impulses to the opposite thalamus and cortex. Findings are discussed in relation with previous work on spinal pathways.