Psychology 1000 Chapter Notes - Chapter 3: Agnosia, Sensory Cortex, Lobotomy

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Laura Fazakas- De Hoog

Document Summary

Note: look at all textbook charts and **figures** Branches out into axon terminals: connects to numerous neurons" dendrites to communicate one neuron can talk with 50000 others. Long fibres guide new neurons to targeted area of brain. Protect brain from toxins: blood-brain barrier prevents toxins & other from entering brain. Neurons: 1) release chemicals to communicate with muscles, glands, neurons. Brain blood vessels have smaller gaps & covered in special glial cells. This reversal is a nerve impulse and hits action potential at +40mv. Mild electrical stimulus to axon, interior voltage differential shifts from -70mv to +40mv. Forced axon to generate a nerve impulse, or action potential. Some anaesthetics stop flow of na+ ions, meaning no pain impulses sent by neurons. Fatty, whitish insulation and protective layer derived from glial cells. Covers many axons in brain and spinal cord. Speeds up nerve impulses to 300km/h by jumping gaps: Nodes of ranvier: regular intervals of extremely thin or absent myelin.