b413s6-answers f07

b413s6-answers f07 - BME-413 Fall 2007 Helps and Answers:...

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BME-413 Fall 2007 Helps and Answers: Review Questions Set #4 1. What is epilepsy? What bioelectrical events are seen on the EEG? What great leader in Roman history is thought to have had epilepsy? An uncontrolled bioelectrical depolarization of the brain. Characterized by large and often propagating bioelectrical events and waveforms seen on the EEG. Julius Caesar 2. How are electrodes placed for use in TENS? Typically above the spinal vertebrate where the nerves enter from the sites of pain. 3. Define functional electrical stimulation. 4. Define the following terms as used in MRI: Larmor frequency, superconducting magnet, radiowave emission from nuclei, 2 Tesla, Radio wave frequencies are absorbed and emitted by atoms in a magnetic field at their Larmor frequency. This is the basis for MRI imaging. The main magnetic field in an MRI system is typically on the order of 2 Telsas or about 20,000 Gauss (small hand magnets are 0.03 T to 0.3 T for example) 2. Define as used in ultrasound imaging:
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This note was uploaded on 06/26/2008 for the course BME 413 taught by Professor Towe during the Fall '07 term at ASU.

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b413s6-answers f07 - BME-413 Fall 2007 Helps and Answers:...

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