APA 2120 Lecture Notes - Lecture 9: Evoked Potential, Transcranial Magnetic Stimulation, Spinal Cord Injury
4 Apr 2016
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How do we assess level of preparation?". Where: peripheral level peripheral nerves, like a relex. Latency of stretch relex = 25ms 50ms. Graph: stimulate nerve prior to making voluntary response (wrist lexion) 45-50ms prior increased excitability at the spinal level prior to response. Spinal cord injury/ ms to assess ability / intactness of spinal cord at any given time. How: electrically stimulate peripheral nerve and measure muscle activity, hofman -1918, subject laying on stomach with feet hanging over the edge of table calf muscle. Push hand against foot and have participant push back as if against a gas pedal stimulate nerve to record occurrence in muscles (emg) Where: magnetic ield induces small electrical currents in nerve cells, motor cortex in right cerebral hemisphere depends on where in the brain you would like to stimulate to initiate response (induces electrical signal over the brain) Stimulation october 22/2015: magsitm capacitor stores electrical charges and can release very quickly (all at once)
