BCIA Peripheral Biofeedback Modalities (EMG, Temperature, GSR) 2

Question 1

The unit of measurement for skin conductance in GSR biofeedback is:

Accepted Answer

Microsiemens (µS)

Answer

Skin conductance is measured in microsiemens (µS), reflecting the inverse of skin resistance (measured in ohms). Higher conductance indicates greater sympathetic arousal.

Question 2

In EMG biofeedback, the amplitude of the signal is typically reported in:

Accepted Answer

Microvolts root mean square (µV RMS)

Answer

EMG amplitude is expressed as microvolts root mean square (µV RMS), which represents the average power of the electrical signal produced by muscle activity.

Question 3

Raynaud's disease is a clinical condition frequently treated with which peripheral biofeedback modality?

Accepted Answer

Thermal (temperature) biofeedback

Answer

Thermal biofeedback teaches clients to increase peripheral blood flow and raise finger temperature, which is directly beneficial for Raynaud's disease characterized by excessive vasoconstriction.

Question 4

Which factor most commonly introduces artifact in surface EMG recordings?

Accepted Answer

Electrode movement and poor skin preparation

Answer

Movement artifact from electrode displacement and impedance caused by oils or dead skin cells are the most common sources of noise in surface EMG biofeedback recordings.

Question 5

A practitioner using GSR biofeedback observes a phasic increase in skin conductance. This most likely reflects:

Accepted Answer

A transient sympathetic response to a brief stressor or orienting stimulus

Answer

Phasic GSR responses (rapid, short-duration spikes) are associated with transient sympathetic activation triggered by orienting responses, emotional stimuli, or unexpected events.

BCIA - Biofeedback Certification International Alliance Practice Test

BCIA - Biofeedback Certification International Alliance Practice Test

BCIA Peripheral Biofeedback Modalities (EMG, Temperature, GSR) 2