Board of Certification for the Athletic Trainer (BOC) Practice Test

What is one common symptom of thoracic outlet compression?

1. Decreased range of motion

2. Paresthesia

3. Muscle weakness

4. Localized swelling

The correct answer is: Paresthesia

Paresthesia is a common symptom of thoracic outlet compression, which occurs when the brachial plexus (a network of nerves) or blood vessels in the thoracic outlet are compressed. This condition can lead to sensations such as tingling, numbness, or a "pins and needles" feeling, particularly in the arms and hands. These sensations arise due to the interference with nerve signaling caused by the compression in that area. While decreased range of motion, muscle weakness, and localized swelling may also present alongside thoracic outlet syndrome, they are not as definitive or characteristic as paresthesia. The hallmark symptom that patients often report is the abnormal sensation in the upper extremities, making paresthesia a key indicator for this condition. Recognizing this symptom is crucial for assessment and diagnosis, enabling appropriate management and treatment.