Question

At therapeutic levels, What kind of EEG findings does phenytoin cause?

1) Alpha waves
2) Beta waves
3) Theta waves
4) Delta waves

Answer 1

Phenytoin primarily affects brain wave activity during sleep, increasing theta wave activity during stage 1 sleep without significantly affecting alpha, beta, or delta waves.

Step-by-step explanation:

At therapeutic levels, phenytoin causes a decrease in both overall muscle tension and core body temperature. In terms of EEG (electroencephalogram) findings, phenytoin primarily affects brain wave activity during sleep.

It can cause an increase in theta wave activity, which are low frequency (4-7 Hz) and high amplitude waves, particularly during stage 1 sleep. Phenytoin does not significantly affect alpha waves, beta waves, or delta waves.