CAS BI 106 Lecture Notes - Lecture 18: Visceral Pain, Receptive Field, Motor Neuron
Document Summary
Phantom pain: phantom pain: pain associated with a body part that has been removed (amputated, the dendrites may have been cut, but the cell body and axon are still intact, cns portions of pathway are intact, too. Referred pain: cns pathway shared between somatic (under skin) and visceral nociceptors (in walls of organs, they share anatomical ascending tracts. Somatic pain is more common (we feel it more: brain cannot distinguish between inputs. If you have pain in your appendix you think it pain in your tummy. General senses: touch: touch is complex, combination of stretch, pressure, distortion of hair follicles, vibration, sensations come together to create accurate picture of discriminatory touch. Different types of touch receptors: receptors can be, unencapsulated: dendrites of a sensory neuron. Better with pain heat and cold: encapsulated: specialized structures involving neuron and other cells and tissues.
