PSYC 1200 Lecture Notes - Transcranial Magnetic Stimulation, Magnetic Resonance Imaging, Phineas Gage
18 Dec 2013
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Document Summary
Linking brain structure to function: patient data. Phineas gage discovered damage to frontal lobe affects emotion and decision making. Visual agnosia - recognizing something but not the name for it. Frontal lobe - affects emotion and decision making. Cause damage to region of animals brain. If damage causes impairment in some function that part of the brain is important for that function. Active neurons produce an electric current that can be measured with surface electrodes attached to scalp. Make people do a task then measure what part of brain is active. Active parts are important for that function. Only gives rough idea of brain areas involved in mental task. Needle electrodes - pushed inside brain, more precise than eeg, records activity of small area. Micro electrodes - record activity of a single neuron, more precise. Temporarily inactivate neurons in certain area in brain. Whichever brain area inactivated may be important for functions impaired by magnetic field.
