PNB 2264 Lecture Notes - Lecture 17: Posterior Grey Column, Dermis, Lamellar Corpuscle
16 Aug 2018
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Document Summary
Nature of sensation: somatic, viscera, exteroceptive. A conscious awareness of signals your body is receiving. Perception conscious awareness of sensation receiving and perceiving information about environment and body interior: stimuli sensory cell ap to cns, specific cns area, cerebral cortex perception (cns construct) Classic five: sight, sound, taste, touch and smell. Others: balance, acceleration, pain, proprioception (position of limbs in space), temperature, itching, pressure, hunger, thirst, satiety, blood co2, these are all conscious senses, there is also unconscious information collected by the body (80-90% is unconscious) Information overload danger: anything that is potential life threatening takes precedence, your body ignores everything else. All senses (without exception) are detected by proteins. These proteins directly or indirectly lead to neuronal cell activation and action potentials sent to the cns. Detection of the sensation is solely within the cns. Sensation is projected onto a mental map of the body. Mechanoreceptors: physical changes in the membrane (touch and feel)
