NEU 311L Exam 1 UPDATED ACTUAL Exam Questions and CORRECT Answers

NEU 311L Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
potential - CORRECT ANSWER - difference in charge between 2 pts
volts


current - CORRECT ANSWER - rate which charge flows
amps


resistance - CORRECT ANSWER - material's tendency to resist current
Ohms


frequency - CORRECT ANSWER - how often
Hz


amplitude - CORRECT ANSWER - peak to valley height of wave
mV


power - CORRECT ANSWER - amplitude^2


mV to uV

25 mV is how many uV - CORRECT ANSWER - mV 10-3
uV 10-6
ex. 0.025V= 25mV= 25,000uV


types of EEg electrodes used - CORRECT ANSWER - + ones!
3 on scalp in class

, what do large amplitude waves require - CORRECT ANSWER - synchronous activity of a
large # neurons


as distance between electrode & recording source decrease.. - CORRECT ANSWER -
amplitude decreases
- material (hair) decreases amplitude signals


EEG 10-20 system - CORRECT ANSWER - brain mapped with #s
odd # for L hemisphere
even # for R hemisphere
letters designate brain region


Alpha Wave Characteristics - CORRECT ANSWER - 8-10 waves/sec
parietal/occipital region predominantly alpha waves
more pronounced when eyes closed


occipital lobe - CORRECT ANSWER - info from retina--> thalamus--> cortex (lobe)
- neurons that are activated by light input to retina inhibit alpha rhythm


EEG noise - CORRECT ANSWER - use fast Fourier transform to decrease noise/view
signal
artifact= random fluctuation in data (head movement/eye blink)


EEG experiment conditions - CORRECT ANSWER - control= base sweet almond oil
experimental= lavender+ almond


research hypothesis vs. null - CORRECT ANSWER - research= independent variable had
an effect