PSYB65H3 Chapter Notes -Middle Cerebral Artery, Posterior Inferior Cerebellar Artery, Vertebral Artery
Document Summary
When a neurotransmiiter diffuses across the synapse to interact w/ postsynaptic site, a series of electrical events can occur, some send information and some inhibit information. The electrical events that make the transmission/inhibition of information relies on the balance of ions between the inside of the neuron (intracellular) and the outside of the neuron extracellular). The r. p of the neuron depends on the difference between the concentration of ions across the neuron membrane neurons contain variety of ions, most important are na+ ions and k+ ions. At rest, extracellular fluid contains high concentration of na+ and intracellular fluid contains high concentration of k_ In the brain, ions are concentrated in either extracellular/intracellular fluid. The neuron has 2 properties that promote the uneven distribution of ions: related to permeability of the cell membrane that covers the neuron membrane is not permeable to all types of ions.
