PSYC 212 Lecture Notes - Lecture 6: Transcutaneous Electrical Nerve Stimulation, Projection Fiber, Dorsal Root Ganglion
Document Summary
Or the bad, the good and the ugly nociception. Free nerve endings: c-fibers (slow, sensitive to more things, chemicals in blood for ex) (slow, long lasting pain) and a (fast) (sensation rapide, forte) fibers, slow and fast pain signals. Pain vs nociception: dectection of pain stimuli, vs what we experience (what part of the body hurts, which fibers are stimulated?) Diff than somatosensory cell body in dorsal root ganglion axons terminates in ventral horn of the spine (being quicker to respond to painful stimuli) , signal crosses to the other side in the spine, A lot of pain receptors, drg combine them, skin and intestine for ex. Why s(cid:373)t (cid:455)ou (cid:449)ill feel pai(cid:374) i(cid:374) a(cid:374) area that has(cid:374)"t (cid:271)ee(cid:374) i(cid:374)jured. How do we keep going even after an injury : battle wounds Is it just a shift in criterion or a change in sensitivity or both : change in sensitivity, how much smt will hurt.
