BIOL 4370 Lecture Notes - Spinothalamic Tract, Posterior Grey Column, Axon Terminal
16 Mar 2014
School
Department
Course
Professor
Document Summary
Oct. 3rd: referred pain: when there is a problem in internal organ, but have pain on external skin. Ie. heart attacks can cause pain in left arm. A beta releases glutamate to a local circuit neuron (or inter neuron) which releases. Gaba onto cell body of secondary neuron and inhibits it. Ie when you bump into something and hurt shin you rubbing it makes it feel better: descending pain control: how placebo effect works. Amygdala indirectly (by influencing other parts of brain) projects axons down to dorsal horn of spinal cord. These axons releases glutamate onto inter neuron releases ekephalin (endorphin) onto axon terminal of c fiber. Enkephalin opens up k+ channels and closes voltage gated ca channels (makes it harder for neuron to release neurotransmitters or reduced pain): phantom limb: neurons in hom fires aps and feels like limb. Myopia is nearsightedness light focuses before retina.
