White Matter - Somatosensory White Matter * Divided into...

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Somatosensory White Matter * Divided into colunms (funiculi) containing tracts * Ascending tracts relay info from spinal cord to brain (sensory) * Descending tracts relay info from brain to cord (motor) Sensory Physiology * Sensations & Perceptions * sensation - is an awareness of sensory stimuli in brain * perception - meaningful interpretation or conscious understanding of sensory data 5 COMPONENTS of SENSORY PHYSIOLOGY * Sensory modalities (receptors)- structures that detect changes in external & internal environment modified neurons or epithelial cells that have evolved to respond to stimuli (eye, ear, nose) Somatic sensibility has four major modalities * discriminative touch -required to recognize the size, shape, and texture of objects and their movement across the skin. * proprioception - the sense of static position and movement of the limbs and body. * nociception -the signaling of tissue damage or chemical irritation, typically perceived as pain or itch.
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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White Matter - Somatosensory White Matter * Divided into...

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