CAS PS 211 Lecture Notes - Lecture 15: Peripheral Nervous System, Limbic System, Homeostasis
15 Sep 2016
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Peripheral nervous system (pns, composed of all neurons forming nerve fibers that connect the cns to the body, function: b. i. b. ii. Pns has to provide the cns with information from sensory receptors. Relay commands from the brain to the body"s organs and muscles: composed of two sets of nerve fibers: c. i. Somatic nervous system voluntary muscles/ processes c. i. 1. c. i. 2. regulates the actions of the body"s skeletal muscles. Autonomic nervous system involuntary body functions c. ii. 1. Must work when you are asleep, sustains life processes during anesthesia and prolonged coma states c. ii. 3. Sympathetic fight or flight controls responses in an emergency or stressful situation c. ii. 3. a. i. Calming down, monitors routine operation of body"s internal functions c. ii. 3. b. ii. Medulla located at the very top of the spinal chord a. i. 1. a. controls breathing, blood pressure, beating of the heart a. i. 1. b. Reticular formation dense network of nerve cells a. i. 3. a. Relays (sensory) information to appropriate area of cerebral cortex a. i. 5.
