Carpal tunnel syndrom (CTS) is the most common form of compression of the median nerve. Although this form of compression is mentioned most, there are also cases where the median nerve is compressed between the heads of the Pronator Teres muscle. Between the heads of the Pronator Teres muscle the median nerve enters deep to the tendinous arch connecting the radial and humeral heads.

This compression is also referred to as the Pronator Teres Syndrome (PTS). The symptoms are comparable to CTS, however it is difficult to diagnose PTS. Some treatment options are splints, local injections or surgical decompression, however if the compression is not in the carpal tunnel and if the compression lies within the pronator teres, no such treatment will be effective.