PSY 102 Lecture Notes - Lecture 3: Myelin, Spinal Cord, Cerebral Cortex
17 Jun 2017
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Document Summary
Neurons: nerve cells specialized for communication. In your brain there are 160 trillion connections: 85-100 billion neurons in your body. Most are in your skull, brain and spinal cord each neuron is connected to 7000 neurons at any moment: made up of. Smaller than rest of neuron but is able to stick up. Collects message from other neuros sends an electrochemical communication down the axon. Contains synaptic vesicles that have chemicals that are pushed out into the synaptic-cleft neurons never touch because they are surrounded by glia cell: 4 different kinds of neuron. Part of the higher and lower area of brain. Doesn"t allow for large molecules to enter. Gives structure to brain, holds stuff in place. Role in mental processes, not quite certain though. Role in alzheimers, dementia: how neurons fires. Neurons when they are resting, the cell body and the axon have a negative charge in contrast to the surrounding body.
