Psychology 1000 Chapter Notes - Chapter 3: Axon Terminal, Neuroglia, Myelin

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: John Campbell

Document Summary

Neural bases of behaviour: brain is grapefruit sized, 3 pound mass of tissue made up of neurons, neurons are the building blocks of the nervous system, at birth we have around 100 billion neurons. In the salty fluid outside the neuron, there are + charged sodium ions. The myelin sheath: a fatty whitish insulation layer derived from glial cells during development. Is not completely formed until after birth: damage can result in multiple sclerosis, results in jerky uncoordinated movements paralysis. The nervous system: sensory neurons: carry input messages from the sense organs to the spinal cord and brain, motor neurons: transmit output impulses from the brain and spinal cord to the body"s muscles and organs. The brain: most complex known structure, 2% of your body weight but uses 20% of the oxygen you use at a resting stage (brain never rests, cerebrum, what makes you unique as a human being.