Ch3_Bio_Psy_08-31_090

Ch3_Bio_Psy_08-31_090 - Chapter 3: Biological Psychology...

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Chapter 3: Biological Psychology
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Physiological Explanations Why is this relevant to psychology? Physiological explanations describe the mechanisms that produce a behavior E.g., decision making and frontal lobe development, depression and serotonin
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Measuring Brain Activity EEG (Electroencephalograph) Uses electrodes placed on the scalp to measure changes in brain electrical activity Measures brain’s responses to stimuli Limited information about location of activity Application example: Memory research PET (Positron emission tomography) Records radioactivity of various brain areas emitted from injected chemicals Provides image that indicate areas of greatest activity Limited information about timing of response
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Measuring Brain Activity (cont.) fMRI (functional magnetic resonance imaging) Uses magnetic detectors outside the head to compare the amounts of hemoglobin with and without oxygen in different brain areas Provides image of the most active areas at that time
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The Nervous System Major Divisions Central nervous system (CNS) Consists of the brain and the spinal cord Peripheral nervous system Allows the CNS to communicate with the rest of the body Consists of bundles of nerves between the spinal cord and the rest of the body
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Development of the CNS Begins development as a tube with three bumps Forebrain Midbrain Hindbrain Spinal cord
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Ch3_Bio_Psy_08-31_090 - Chapter 3: Biological Psychology...

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