BISC 104Lxg Lecture Notes - Lecture 11: Homeostasis, Middle Ear, Extracellular Fluid
1 Mar 2017
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Actual or perceived threat activates the cortex - amygdala - hypothalamus - crh - This occurs after a person is exposed to severe stress. This disorder is a type of stress reaction that may get worse with time. Research has shown that victims of ptsd show abnormal brain patterns and changes in the volume of certain areas of the brain (the amygdala and hypothalamus) This helps explain the symptoms of ptsd: fear, heightened vigilance, panic reactions, inability to concentrate, and memory disorders. Sudden numbness or weakness of face, arm or leg, especially on one side of the body. Sudden trouble seeing in one or both eyes. Dementia is syndrome characterized by failure of recent memory and other intellectual functions that is usually insidious in onset but steadily progresses. In order to hear, the ear collects and amplifies sound waves that are produced by vibrations. The loudness of a sound is determined by the amplitude of the sound wave.
