Anatomy and Cell Biology 3319 Lecture Notes - Lecture 8: Solitary Tract, Thalamus, Cerebellar Vermis
7 Oct 2016
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Identify the 3 major subdivisions of the brainstem and describe the anatomic relationships of the major motor and sensory nuclei and the major descending and ascending tracts in the brainstem. Brain stem is involved in relaying information to the forebrain, integrating major visceral reflexes and has a strong impact on motor control. Ventral (anterior) surface of the brain stem one thing that is very apparent is the presence of the numerous cranial nerves that innervate the brain stem. Level of the midbrain optic nerves cross at optic chiasm: become the optic tracts which cover a large portion of the midbrain. Middle cerebellar peduncle: nerve fiber tracts running horizontal across the brain stem: carries information from the pons to the cerebellum. Level of the midbrain corpora quadrigemina: composed of the superior/inferior colliculi responsible for visual and auditory reflexes (i. e. receive auditory/visual information) e. g. loud noise causes you to turn towards the noise.
