PSYC 100 Midterm: Neurobiology PSYC 100 -1-

• School: McGill University
• Department: Psychology
• Course: PSYC 100

Document Summary

Spinal cord: peripheral nerves system, somatic nervous system. Skin, muscles and joints send signals to the spinal cord and brain. Brain and spinal cord send signals to the muscles joints and skin. Transmits signals to cns from muscles, joints, skin via nerves. Cns sends signals trough sns trough muscles, joints, skin to initiate, modulate or inhibit movement: autonomic nervous sytem. Gland and internal organs send signals to the spinal cord and brain. Brain and spinal cord send signals to the glands and internal organs. Nerves of ans project signals from these targets to cns. #ans divided into sympathetic and parasympathetic system (opposing systems). Chronic stress leads to increased activity of this system. Dilates pupils - relaxes bronchi - accelerates, strengthens heartbeat - contrasts vessels - in- hibits stomach activity. Contracts pupils - constricts bronchi - slows heartbeat - stimulates stomach activity - dilates vessels. A communication network that in uences thoughts, behaviours, actions.