1 Olivospinal tract. Tractus olivospinalis. Ex- 16 trapyramidal tract limited to the cervical cord. It influences head and hand movements. D

2 Spino-olivary tract. Tractus spino-olivaris. Tract that extends throughout the entire spinal cord and provides information for the olive, partly for its own needs, partly for those of the cerebellum. D

3 Olivocerebellar tract. Tractus olivocerebellaris. It passes through the inferior cerebellar peduncle from the olive to the cerebellum. B

4 Inferior cerebellar peduncle. Pedunculus cere-bellaris inferior. Inferior connection to the cerebellum without a sharply defined boundary from the middle cerebellar peduncle. It contains fibers primarily from the spinocerebellar tract and olive. A B

5 Nucleus of hypoglossal nerve (hypoglossal nucleus). Nucleus nerve hypoglossi (nucleus hypoglossalis). It is located below the floor of the lower rhomboid fossa. C D

6 Posterior paramedian nucleus. Nucleus para-medianus posterior. Cell group in the vicinityof the hypoglossal nucleus that communicate with the reticular formation.

7 Dorsal nucleus of vagus nerve (dorsal vagal nucleus). Nucleus dorsalis nervi vagi (nucleus vagalis dorsalis). Autonomic and sensory cell group located lateral and caudal to the hypo-glossal nucleus. C D

8 Nucleus intercalatus. Nuclear group of unknown function situated between the nucleus of the hypoglossal nerve and the dorsal nucleus of the vagus. C

9 Tractus solitarius. Taste fibers of cranial nerves V, VII, IX and X for the nucleus of the tractus solitarius. C

10 Nucleus solitarius. Row of cells for the tractus solitarius extending from the middle of the rhomboid fossa to the decussation of the pyramids. C

11 Nucleus parasolitarius. Dispersed cells ven-trolateral to the nucleus solitarius with no known function.

12 Vestibular nuclei. Nuclei vestibulares. Four terminal nuclei of the vestibular division. They have projections to the spinal cord, cerebellum and medial longitudinal fasciculus. A

13 Inferior vestibular nucleus. Nucleus vestibularis inferior. Oblong nuclear group lying laterally beneath the medial nucleus with projections to the cerebellum and medial longitudinal fasciculus. A

14 Medial vestibular nucleus. Nucleus vestibular medialis. Group of nuclei lateral to the limiting sulcus with fibers oforigin for the medial longitudinal fasciculus of both sides. A

15 Lateral vestibular nucleus. Nucleus vestibu-laris lateralis. Smaller group of nuclei located toward the lateral recess with projections to the anterior horn of the spinal cord. A

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Essentials of Human Physiology

Essentials of Human Physiology

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