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The Neck and Labyrinthine Influences on Cervical Spinocerebellar Tract Neurones of the Central Cervical Nucleus in the Cat
Description
Publisher Summary This chapter investigates the cerebellar projection areas and the input to the spinocerebellar tract (SCT) originating from the central cervical nucleus (CCN) by electrophysiologically in the cat. The CCN-spinocerebellar tract has now been identified as (1) receiving synaptic inputs from both the neck and the labyrinths, and (2) projecting to the vermis of the anterior lobe and to the posterior lobe. Experiments indicate that the input from the neck to CCN-SCT cells is primarily of joint origin probably from the same afferents which initiate tonic neck reflexes, influence extraocular motoneurones, and project to the flocculus. Wilson et al. have shown that the joint afferent impulses are relayed by neurones of Brodal and Pompeiano's group x; the latter neurones do not receive input from the labyrinth in contrast with the CCN cells, the majority of which are co-excited by impulses from both the neck and vestibular afferents.
