CGS NS 201 Lecture Notes - Lecture 8: Skeletal Muscle, Cerebellar Vermis, Cerebral Peduncle
9 Aug 2018
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Document Summary
Brain anatomy know the functions of the regions of the cerebrum, brainstem, cerebellum, cerebrum, 84 % of the brain, 5 lobes, frontal, parietal, occipital, temporal, insula. 40 % of total brain mass: contains billions of nerves arranged in six layers. Has folds called gyri separated by grooves called sulci: increase surface area. Consists of: neuron cell bodies, dendrites, unmeyelinated axons, but no fiber tracts. Broca"s area controls speech, tongue, pharynx, lips in one hemisphere. Cerebral white matter (deep) = fiber tracts. Cerebral nuclei (basal nuclei) = islands of grey matter in the fiber, tracts: functions: consciousness, motor initiation, sensory, integration, associative, brain stem, midbrain. : constriction of pupils in response to light. Consists of paired cerebral peduncles, cerebral aqueduct, corpora quadrigemina (superior & inferior colliculi) Superior cerebral peduncles contain tracts descending to spinal cord. Corpora quadrigemina: superior colliculi coordinates head and eye movements when tracking object, inferior colliculi auditory startle response. Cerebral aqueduct that connects 3rd and 4th ventricles: pons:
