Certified Polysomnographic Technician (CPSGT) Practice Exam 2025 - Free CPSGT Practice Questions and Study Guide

Question: 1 / 400

Where should the leg EMG lead be placed for optimal results?

On the calf muscle

On the anterior tibialis

Placing the leg EMG lead on the anterior tibialis muscle is optimal for monitoring muscle activity during sleep studies. The anterior tibialis is a muscle located in the front of the lower leg and is involved in dorsiflexion of the foot, making it particularly relevant for detecting leg movements or muscle tone that may occur during sleep. By positioning the lead in this area, the technician can effectively capture and monitor the muscle contractions that might indicate periodic limb movements or restless leg syndrome.

Other potential locations, such as the calf muscle, lower back, or upper thigh, might not provide as clear an indicator of leg activity because they may register less specific movements or may be influenced by other surrounding muscles or body dynamics. Thus, using the anterior tibialis as the site for EMG leads enhances the clarity and accuracy of the data collected in polysomnographic assessments.

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At the lower back

On the upper thigh

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