ANAT 312 Lecture Notes - Lecture 10: Medial Lemniscus, Pontine Nuclei, Lateral Lemniscus

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 312
• Professor: Leslie W Mac Kenzie

Document Summary

Pons / cn v, vi, vii, viii (reading material nolte textbook: chapter 11; chapter 12:297-300, 303, 306-315; chapter 15) develops from the expansion of the neural tube in the formation of the 4th ventricle. Internal features: lateral displacement of the alar and basal plates migration of neuroblasts from the alar plate give rise to the pontine nuclei alar plate gives rise to the rhombic lips: develops into the cerebellum. Level through the caudal pons: basal pons: anterior (ventral) portion of the pons tegmentum: posterior (dorsal) portion of the pons pontine nuclei- the black dots in the image. These give rise to the axons basal pons: which form the transverse fibrillar appearance of the basal pons. In the horizontal fibres the axons of the pontine nuclei are going to the cerebellum. Pyramidal tract becomes dispersed in the basal pons. Basal pons axons of the nerve cells in the pontine nuclei give rise to transverse fibers: pontocerebellar fibers.