PSY 1101 Lecture Notes - Lecture 2: Myelin, Ion, Cittern

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Kenneth Campbell

Document Summary

Axon: communication, grey (short) and white (long) matter, may have a myelin sheath, terminal ending (bouton endings) Receiving information from other neurons: does not have myelin. Myelin sheath: covers axon (long axons, increases speed of transmission, insulates axon-> impedes other signals from surrounding neurons, made of lipids, also known as white matter (grey matter is neurons without myelin sheath) Terminal endings: exposure of axon, neurotransmitters are stored within bouton, under influence of action potential, the neurotransmitters are released, physical gap between neurons is called the synaptic gap/synaptic cleft. Excitation or inhibition: there are breaks in the myelin sheath called nodes of ranvier. The nobel prize of 1906 c. golgi and s. ramon y cajal. Golgi stained method: method to see small parts of the neuron. Golgi believed there was a physical connection. Cajal saw different types of neurons in different regions (for different senses and functions) Sensory neurons: transmits impulses received by sensory receptors to central nervous system (cns).