ANAT 312 Lecture Notes - Lecture 8: Inferior Cerebellar Peduncle, Posterior Inferior Cerebellar Artery, Cerebellar Peduncle

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

Document Summary

Brainstem (reading material nolte textbook: chapter11: pages 266-271) Medulla oblongata: anterior surface: with the anterior median fissure of spinal cord. location between the spinal cord and pons. External features: anterior median fissure down the midline of the medulla. Contingent pyramids: from cortex down through brainstem to medulla forming the pyraminds. corticospinal fibers that originate in the cerebral cortex of the precentral gyrus on either side of the fissure. The fibres travel decussation of pyramids (landmark where medulla is continuous with the spinal cord) crossing over of fibres at the midline of the pyraminds. Where the fibres to the corticospinal tracts cross over before going to spinal cord. oval elevations produced by the underlying inferior olivary olives: nucleus. They are heavily involved in balance and coordination and connects to the cerebellum via the inferioir cerebellar peduncle. the muscles of the tongue. between the pyramids and olives are the rootlets of cn xii (hypoglossal nerve).