Kinesiology 4432A/B Study Guide - Final Guide: Functional Magnetic Resonance Imaging, Haemodynamic Response, Paramagnetism
14 Apr 2018
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The levels that are being detected are called: blood-oxygenation-level-dependent- signal. Oxygenation: the process of removing oxygen from the blood, taking it into the cell and using it. This then shows you the part of the brain that was engaged during the stimulus; you can then track whether or not the activity increased or decreased relative to baseline. Assessing cortical associations with volitional muscle activation: boxcar model. Comes with many limitations: movement, supine posture, claustrophobia. We are trying to find the parts of the brain that are associated to the vagus system, not the brain stem we are looking at the cortex. Mortex cortex is active when you do the exercise. Insula (buried under the temporal lobe) activity goes up and down; up: it goes up everytime you squeeze the handgrip device. Meta-analysis of cortical activation patterns during moderate intensity handgrip contractions. This is what happens when people perform handgrip contractions.
