PSYCH 101 Lecture Notes - Lecture 5: Sympathetic Nervous System, Parasympathetic Nervous System, Somatic Nervous System
Document Summary
Axons of sensory neurons group together like the many strands of a rope to form sensory nerves. Motor neuron axons combine to form motor nerves (inside the brain and spinal cord, nerves are called tracts) Autonomic nervous system: controls the glands and the smooth muscles that form the heart, the blood vessels, and the lining of the stomach and intestines (involuntary functions) Sympathetic nervous system: activation or arousal function (when you"re nervous, sympathetic nervous system simultaneously speeds your heart, dilates your pupils, slows down your digestive system, and increases your rate of respiration: fight-or-flight response) Parasympathetic nervous system: slows down body processes and maintains or returns you to a state of rest (homeostasis: delicately balanced or constant internal state) 40-45 cm long and 2. 5 cm in diameter. A grapefruit-size mass of tissue that feels like jelly and looks like a greyish gnarled walnut. Measure verbal and non-verbal behaviors that are known to be affected by particular types of brain damage.
