PSY 105 Lecture Notes - Lecture 3: Magnetic Resonance Imaging, Temporal Lobe, Adderall
25 Feb 2016
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Document Summary
2 major types of cells found in nervous system are neurons and glia. Structural neuroimaging techniques (neuroimaging): use advance technology to create images of the living, healthy brain in awake human. Provides images of what the brain itself looks like: Magnetic resonance imaging (mri): provides a clearer, high resolution picture of the brain"s structure. Functional brain imaging techniques: allow us to watch the brain in action. Positron emission tomography (pet): harmless radioactive substance is injected into person"s blood, radiation detectors are used to scan person"s brain, active brain areas have more blood flow and this display higher amounts of radioactivity. About 100 billion neurons in the brain. Glia (glial cells): cells that help support neurons and make up the nervous system. Glia are also involved in various functions, such as forming the blood-brain barrier, producing myelin, and clearing the brain of debris. Examples of 2 glia types: oligonderoglia: provide myelin to speed up transmission of neurons.
