PSYC 1103 Lecture Notes - Lecture 5: Striatum, Motor Cortex, Amygdala
21 Dec 2016
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Animal studies done by lesion(destroying brain parts and then measuring its effects and consequences) Neuroimaging techniques (ct scan) to examine brain structures and its functioning. The case of phineas gage in which brain damage resulted in changes in behaviour and personality. Pet scan (positron emission tomography: visual display of the brain, radioactive form of glucose is detected. Mri (magnetic resonance imaging: magnetic field/radio waves are used, clearer images are produced than from pet scans, monitors oxygen consumption. Enlarged brain ventricles could lead to schizophrenia. Neurons: the main building blocks of the brain: sensory neuron: gather information (afferent pathways to the central nervous system) Interneuron: carry information: motor neuron: send information (efferent pathways to the muscles, from the dendrites of the neuron, to the cell body, to the axon, to the axon terminal. Extracellular and intracellular fluid surround cells contain charged particles called ions: resting potential: neuron is at rest (polarized) Has an electrical potential of -70 mv.
