NSCI 1051 Lecture Notes - Dorsal Root Ganglion, Posterior Grey Column, Sensory Neuron
16 Apr 2014
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Somatic sensation: enables body to feel, ache, chill, sense position of joints, pressure, temperature, sensitive to stimuli, responsible for feeling of touch and pain, somatic sensory system: different from other systems. Receptors: distributed throughout (different kinds of receptors) Types of skin: hairy vs. glabrous (hairless) Do not dwell too much on this material in yellow highlight, since it is peripheral function and the test will focus on central function. Know the mnemonic about the function of different cell type, otherwise but don"t compulse over the details. Mechanoreceptors: meissner"s: light touch, merkel"s: touch, pacinian: deep pressure. Division of spinal gray matter: dorsal horn: the dorsal region of the spinal cord containing neuronal cell bodies. Intermediate zone: ventral horn: the ventral region of the spinal cord containing neuronal cell bodies. Proprioception: sense of static and dynamic position of limbs and body. Kinesthesia: the ability to feel movements of the limbs and body. Stereognosis: ability to recognize objects based on touch alone.
