LTM EEG Instrumentation

Question 1

ACNS guidelines for performance specifications of amplifiers. Noise level than than______uV rms, Input impedance of atleast_____Mohm, Common mode rejection of at least _______DB, Dynamic range o fat least____DB

Answer 1

1uV rms, 1 Mohm, 60dB, 40 dB

Question 2

ACNS technical specifications recommended fordata acquisition recommended for data acquisition/storage. Able to record _____hours of video and ____ to____ channels of EEG. Able to store minimum ____GB or____ hours video/EEG

Answer 2

24 hours, 32-64 channels,30GB or 24 hours

Question 3

What is the number of channels ACNS recommends as minimally sufficient for ambulatory EEG?

Answer 3

8 channels

Question 4

What is the current range for impedance measurements recommended by ACNS that can be safely performed for intracranial electrodes?

Answer 4

10nA. this is 1000x less voltage than normal 10Kohm impedance of scalp electrodes