vastdex.blogg.se - Pronator syndrome

The lacertus fibrosis is an aponeurosis layer of the distal biceps, coursing obliquely in a distal and medial orientation.

Between the two heads of pronator teres muscle.

Bicipital aponeurosis (lacertus fibrosis).

Ligament of Struthers (courses between the supracondylar process and medial epicondyle).

Supracondylar process (anterior distal humerus seen on lateral radiograph), occurs in approximately 1% of the population.

Potential site of compression of median nerve in case of pronator teres syndrome include: Pronator Teres Anatomy Sites of Compression Its action includes Pronating and flexing theforearm. It’s origin is from the medial epicondyle and coronoid, and inserts onto the midlateral radius. Pronator Teres Muscle is one of the superficial flexors of the forearm. Median Nerve Anatomy Pronator Teres Muscle Median nerve passes through the carpal tunnel between FDS and flexor carpi radialis (FCR) to supply the radial lumbricals, thenar musculature via a deep recurrent branch, and sensation to the volar aspect of thumb, index, long, and radial half of the ring fingers.

Palmar cutaneous branch arises approximately 6 cm proximal to radial styloid and passes superficial to the flexor retinaculum to innervate the thenar skin. Terminates in the pronator quadratus (PQ). Supplies all the superficial flexor muscles of the forearm except the FCU.Īnterior interosseous nerve branches 4 cm distal to elbow and runs between the FPL and FDP, supplies all the deep flexors except the ulnar half of the FDP. In forearm, the median nerve splits the two heads of the pronator teres and then runs between the FDS and FDP. It Supplies some branches to the elbow joint but has no branches in the arm itself. It accompanies brachial artery in the arm, crossing it during its course (lateral to medial) approximately 15 cm from the medial epicondyle. The median nerve arises from the medial and lateral cords, (C5-T1). See Also: Carapal Tunnel Syndrome Related Anatomy Median Nerve

Pronator syndrome differentiated from Carapal Tunnel Syndrome CTS by proximal volar forearm pain and sensory disturbances in distribution of palmar cutaneous branch of the median nerve. It’s more common in women in the fifth decade of life. Pronator Teres Syndrome (PTS) is a compression of the median nerve in the arm/ forearm.