accessory cuneate nucleus

a cell group lateral to the cuneate nucleus which receives posterior-root fibers corresponding to the proprioceptive innervation of the arm and hand; it projects to the cerebellum by way of the cuneocerebellar tract, and can be considered the upper-extremity equivalent of the thoracic nucleus. Syn: nucleus cuneatus accessorius [NA], external cuneate nucleus, lateral cuneate nucleus, Monakow’s nucleus.