1. The EEG is NOT used for diagnostic purposes for which of the following medica

Question

1. The EEG is NOT used for diagnostic purposes for which of the following medical issues?

A. Epilepsy

B. Tumors

C. Drug poisoning

D. All of the above can use the EEG for diagnostic purposes

2. Which type of brain wave originates in the central and pariental regions of the brain and is associated with normal sleeping?

A. Theta
B. Delta
C. Beta
D. Alpha

3. Which component of the EKG causes the heart to contract?

A. AV node
B. P wave
C. QRS complex
D. T wave

4. Oscilloscope trigger problem. The 'trigger' settings determine when the trace begins. Suppose you have displayed a sine wave with V = Vosin(?t)Vosin(?t) on the screen, where Vo=4VVo=4V and ?/2?=5kHz?/2?=5kHz. Assume further that the signal triggers the scope when V=2VV=2V and?t=30 degrees?t=30 degrees.
EXAMPLE:
Suppose you double the amplitude of the wave without changing any oscilloscope settings. What are VV and ?t?t now when the scope is triggered? [Answer: the level hasn't changed so the scope still triggers when V=2VV=2V.   V=2=8sin(?t)V=2=8sin(?t);   ?t=sin?1(2/8)=14.4775121851511 degrees?t=sin?1(2/8)=14.4775121851511 degrees.]
QUESTION:
Assume that you reduce VoVo back to 4 V and switch the trigger slope polarity from '+' to '-' without changing the trigger level dial. What are V and ?? t when the scope is triggered now?
___ Volts,
____ degrees

Explanation / Answer

Question No. 1) EEG is not used in Drug Poisioning

Question no 2) delta

Question No3) QRS complex shows more deflection in heart to contract

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