PSYC 271 Lecture Notes - Lecture 16: Phantom Limb, Biceps, Triceps Brachii Muscle
14 Dec 2015
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Document Summary
Video: s. ramachandran (ted video); guy who invented the mirror box used to help treat phantom limb pain; talked about topics like (1) capgras delusion (2) phantom limbs (3) synesthesia. Interlinking of motor and sensory info is why we have named this sys sensorimotor sys. Skeletal muscles moves body parts around; ex. Can be divided in (1) flexors (2) extensors. Synergistic muscles muscles that work together to create a movement; includes biceps & brachioradialis/brachalis. Antagonistic muscles muscles that act in opposition to each other; ex. Smooth muscle controls movement through (1) intestinal sys (2) pupil dilation (3) arterial constriction/relaxation (4) hair follicles. Acetylcholine released by motor neurons at the neuromuscular junction depolarize muscle; wave of depolarization (similar to ap) across muscle causes contraction: motor pool all motor neurons innervating the fibres of a single muscle. Repeated ap from motor pools (dots) produce sustained tension. Slow muscle fibers capable of sustained contraction due to vascularization; red.
