PSY493H1 Study Guide - Comprehensive Final Exam Guide - Neuron, Action Potential, Wireless Access Point
Document Summary
Resting potential: the resting potential of a neuron refers to the state of the neuron prior to the sending of a nerve impulse (around -70mv) Ions involved: the membrane is selectively permeable allowing some chemical (e. g. k+) to pass more freely than others, this selectivity and na+/k+ pump is what create the resting potential, at rest, na+ is greater conc. On the outside, while k+ is greater on the inside. The action potential: action potential (ap): rapid depolarization of the neuron, the ap threshold varies from neuron to neuron, stimulation of the neuron past the threshold of excitation (e. g. -55mv) will trigger ap. Monitoring: perturbation provides causal evidence, while monitoring provides correlational evidence, computational modeling is a third approach that can formalize theories and explain data. Very invasive only used in animal models are humans undergoing bran surgery: single-neuron recordings: can be recorded either in vitro or in vivo and they record activity of a single neuron during task-related activity.
