HK 3100 Study Guide - Final Guide: Alpha Motor Neuron, Rectus Femoris Muscle, Chemical Synapse

• School: University of Guelph
• Department: Human Kinetics
• Course: HK 3100
• Professor: leahbent

Document Summary

Dermatome an area of skin supplied by peripheral nerve fibres from a single dorsal root ganglion. Providing kinesthetic sensations about movement and position providing rapid response to perturbation or disturbances of movement (reflexes) Based on the existence of neural connections that provide short latency input (afferent-sensory receptors) and output (efferent-motor response, motor units and motor neurons) Refle(cid:454)es are (cid:862)a stereot(cid:455)ped (cid:373)otor respo(cid:374)se of a(cid:374) orga(cid:374)is(cid:373) to a se(cid:374)sor(cid:455) sti(cid:373)ulus. Reflexes can adapt to best suit a given task. Three ways to alter strength of spinal reflex: cell body of the alpha motor neuron. Recurrent inhibition (renshaw: presynaptic connections to the sensory afferents. Pres(cid:455)(cid:374)apti(cid:272) i(cid:374)flue(cid:374)(cid:272)es o(cid:374) a posts(cid:455)(cid:374)apti(cid:272) (cid:374)euro(cid:374)(cid:859)s ge(cid:374)eratio(cid:374) of an action potential. Presynaptic magnitude is proportional to the amount of neurotransmitter released and location relative to the axon hillock. Epsp/ipsp are different from action potential in two ways: epsp/ipsp is local and graded (not propagated, not all or none, epsp/ipsp is (cid:374)ot follo(cid:449)ed (cid:271)(cid:455) a refra(cid:272)tor(cid:455) period.