PSYC 302 Lecture Notes - Lecture 6: Axon Hillock, Multiple Sclerosis, Generalised Tonic-Clonic Seizure
Document Summary
Neurophysiology: study of life process allowing the use of neurons to use chemicals and electrical processes to communicate with one another: the generation, transmission and integration of neuronal signals. Ion: electrically charged molecule: cation: positively charged, anion: negatively charged. Inside of the cell/axon is negative (intra is more negative compared to the outside) Inside is mostly negative due to the negative proteins on the inside: many negative proteins on inside as a result. 1: sodium potassium pumps: specialized channel that will move a certain amount of sodium in the cell and certain amount of sodium out, help bring us back to resting potential, 3 na+ out, 2 k+ in. 5- 2 millaseconds for action potential to go down. Movement down the action potential: propagation: movement of action potential down the axon. Conduction: much less work, action potential doesn"t need to propagate, can just travel through, don"t need na+ open. Only at the nodes of ranvier will it need to stop.
