lecture_7_chronic_pain - Chronic Pain What is pain? A...

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    Chronic Pain
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    What is pain? A sensory and emotional experience of  discomfort. Single most common medical  complaint.
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    Qualities of Pain Organic vs. psychogenic Acute vs. chronic Malignant or benign Continuous or episodic
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    Perceiving Pain Algogenic substances  – chemicals  released at the site of the injury Nociceptors  – afferent neurons that  carry pain messages Referred pain  – pain that is perceived  as if it were coming from somewhere  else in the body
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    Peripheral Nerve Fibers  Involved in Pain Perception A-delta fibers – small, myelinated fibers  that transmit sharp pain C-fibers – small unmyelinated nerve  fibers that transmit dull or aching pain. A-delta fibers
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    Pain without apparent physical  basis Persists long after healing May spread and increase in intensity May become stronger than was the  initial pain from the injury
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  Three Chronic Pain Conditions Neuralgia  – an extremely painful condition  consisting of recurrent episodes of intense  shooting or stabbing pain along the course of the  nerve. Causalgia  – recurrent episodes of severe burning  pain. Phantom limb pain
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This note was uploaded on 09/26/2011 for the course PSYCHOLOGY 110 taught by Professor Kannan during the Spring '11 term at Anna University Chennai - Regional Office, Coimbatore.

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lecture_7_chronic_pain - Chronic Pain What is pain? A...

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