An excellent, quick-responding marker of activity in the sympathetic nervous system is:

Question

Quizplus · Accepted Answer

Electrodermal activity (EDA) is an excellent and quick-responding marker for sympathetic nervous system activity because it measures changes in the skin's ability to conduct electricity, which varies with sweat gland activity. This activity is directly controlled by the sympathetic nervous system, making EDA a direct indicator of changes in sympathetic arousal.

An Excellent, Quick-Responding Marker of Activity in the Sympathetic Nervous