The Spinocerebellum

The cerebellum has three general subdivisions. An intermediate zone extends down the center of the cerebellum, separating two lateral hemispheres. Together with a midline structure called the vermis, the intermediate zone comprises the spinocerebellum, or paleocere-bellum division. The spinocerebellum receives sensory information from proprioceptive endings and exterocep-tors for touch and pressure from the spinal cord, as well as vestibular, visual, and auditory inputs.

As is the general scheme for all cerebellar regions, output from the spinocerebellum is generated from Purkinje cells in the cortex and relayed through deep cere-bellar nuclei before exiting through superior and inferior cerebellar peduncles. Two deep cerebellar nuclei, fastigial and interposed nuclei, are associated with output from the spinocerebellum and send information to the spinal cord through three main routes: (1) indirectly through the reticular formation and the reticulospinal tract, (2) indirectly through the red nucleus and the rubrospinal tract, and (3) directly to spinal motor neurons (see Fig. 2). The spinocerebellum controls descending motor systems and thus plays a major role in controlling ongoing execution of limb movement.

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Get Rid of Gallstones Naturally

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