NSCI 1001 Lecture 4: Class 4 - Integration

• School: UMN
• Department: Neuroscience Department
• Course: NSCI 1001
• Professor: Alfonso Araque

Document Summary

Neurons have different types of ion channels that can alter the membrane potential (vm) : Voltage-gated channels - ion channels that are activated by changes in the electrical membrane potential near the channel. Ligand-gated channels - ion channels that are activated by chemical messengers (neurotransmitters) Different types of ionic channels mediate different patterns of neuronal activity. The action potential is the basic unit of the code of neural information. Channelopathies: diseases caused by mutations in ion channel genes. How the brain receives information from the external world. Neurons (and receptor cells) transduce physical and chemical stimuli into electrical signals. The external worlds in represented in the brain by action potentials. The ensembled electrical signals of large populations of neurons can be monitored. The brain commands the muscles and glands to perform muscle. The sensory organs are what sees, hears, smells, feels, and tastes. Retina is formed by several layers of cells.