PHGY 209 CNS Lecture I

PHGY 209 CNS Lecture I - PHGY 209 CNS Lecture I November 1,...

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PHGY 209 CNS Lecture I November 1, 2008 Major divisions of the nervous system Afferent (sensory input) = cell bodies in the PNS i.e. spinal nerves carry somatic sensation & visceral information. Cranial nerves somatic, visual, olfactory, taste, auditory goes straight to the brain. Efferent (motor output) = cell bodies in the CNS. Two ways to get out = cranial nerves, spinal nerves. Somatic efferent/ motor neurons. = innervates skeletal muscle, only excitory (only excite muscles), Autonomic efferent = innervates interneurons. Responsible for smooth and cardic muscle. They are both excitatory and inhibitory. Enteric-motor control of the digestive tract Brain anatomy Spinal cord brain stem Brain stem has three levels midbrain, pons, medulla. Thalamus – relay station Corpus callosum – transmit information between the two halves of the cerebral cortex Cerebral cortex where we think. Sheet of gray matter surrounding the matter Cerebral cortex is divided into front, parietal, occipital, and temporal. Cortex is made of wrinkles called gyri and sulcus. (Central sulcus- separate the motor cortex from the
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This note was uploaded on 12/25/2008 for the course PHGY PHGY 209 taught by Professor Annwechsler during the Spring '08 term at McGill.

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PHGY 209 CNS Lecture I - PHGY 209 CNS Lecture I November 1,...

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