PSY 405 Study Guide - Midterm Guide: Developmental Cognitive Neuroscience, Conductive Hearing Loss, Sensorineural Hearing Loss
27 Oct 2016
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Techniques in kids (erp, fmri mri nirs, meg pet) Electrical recording of the brain (neuron activity through action potentials and postsynaptic potentials) Extracted from the brain"s background electrical activity by recording the eegs during several stimulus-response repetitions. (present stimuli--see how brain activity in particular locations is changed. ) If infant detects the stimulus, change in the pattern of brain waves -evoked potential. For two stimuli that are sensed differently - different patterns of electrical activity. Described in terms of latency, peaks, duration, scalp topography, source. Some issues include noise and conductivity of the scalp. A technique for mapping brain activity by recording magnetic fields produced by electrical currents. Waves less distorted than eeg so better spatial resolution. Split second temporal resolution and much better spatial resolution. Used to observe metabolic processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule.
