Question

EMG signals range from ______________

(a) 0.1 to 0.5 mV

(b) 0.050 to 0.1 mV

(c) 0.5 to 1 mV

(d) 0.025 to 0.050 mV

I got this question in unit test.

Enquiry is from Multi-Channel Wireless Telemetry System topic in division Biomedical Telemetry of Biomedical Instrumentation

Answer 1

Correct choice is (a) 0.1 to 0.5 mV

Explanation: A typical EMG signal ranges from 0.1 to 0.5 mV. They may contain frequency components extending up to 10 kHz.Such high frequency signals cannot be recorded on the conventional pen recorders and therefore, they are usually displayed on the CRT screen.