PSYCO275 Lecture Notes - Sympathetic Nervous System, Peripheral Nervous System, Somatic Nervous System
11 Mar 2014
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Document Summary
Nervous system: a communication network consisting of nerve cells, both inside and outside of the brain and spinal cord. Central nervous system consists of brain and spinal cord. The somatic nervous system has both afferent nerves that takes information away from the cns to the peripheral and efferent nerves that take information from the peripheral to the. Autonomic nervous system also has afferent nerves that serve the same purpose and efferent nerves broken into sympathetic and parasympathetic. Based on a subjective experience you can trigger responses in the pns. Sympathetic nervous system is the fight or flight response system. Increase in heart rate and blood flow as well as respiration to increase oxygen uptake. Signals leave the spinal cord from predominantly the thoracic and lumbar regions. Second stage neurons far from target organ giving up specificity for speed. Parasympathetic is the rest and restore response system. Point of exit in the spinal cord are the cranial and sacral regions.
