NRSC 335 Lecture Notes - Lecture 8: Motor Neuron, Membrane Potential, Lidocaine

• School: Texas A&M University
• Department: Neuroscience
• Course: NRSC 335
• Professor: Stephen Maren

Document Summary

Inje ct e le ctrica l curre nt: re cord me mbra ne pote ntia l = volta ge. Graded membrane potentials: re cord from a xon, de pola riza tion: be coming more pos itive, hype rpola riza tion: be coming more ne ga tive, re corde d volta ge s a re gra de d. Inje ct ne ga tive curre nt into a xon. S pe e d de te rmine d by a xon dia me te r; la rge r = fa s te r. P ropa ga tion tra ve ls a t 120 m/s. From motor corte x ne uron -> s a cra l s pina l motor ne uron. 600 time s more pe rme a ble: na + ga te clos e s a fte r 0. 5 ms, ca n"t re ope n for 1 ms, absolute refractory period. P ota s s ium k+ cha nne l ope ns.