PSYC 365 Chapter 8: Pain

97 views12 pages

Document Summary

Pain necessary for survival: miss c. 3 functions of pain: prevent further injury. Occurs behavior serious injury causes us to withdraw immediately: learn for the future, enforce inactivity and rest (e. g. damaged joins, abdominal infections, diseases, serious injuries. Afferent (sensory) neurons: part of pns, go to spinal cord, then brain, conduct impulses from sense organ to cns or from lower to higher levels in spinal cord and brain. Nociceptors: afferent nerve endings responding to pain stimuli, when activated: generate impulses that travel to cns. A-delta fibers: afferent peripheral fibers transmitting pain, small, myelinated transmit impulses quickly, sharp, distinct pain, strongly influence sensory aspects of pain, send messaged through the thalamus to the cerebral cortex, where a-delta fibers signal sharp pain. C-fibers: unmyelinated slower, 60% of all sensory afferents, diffuse, dull, or aching pain tend to determine affective and motivational elements of pain, send pain messages to brain stem and lower portions of the forebrain.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents