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The tendons of the flexor digitorum superficialis and profundus pass through a common ulnar sheath, while the tendon of the flexor pollicis longus passes through a separate radial sheath. The mesotendon shared by these tendons is attached to the radial and palmar walls of the carpal tunnel. [4]
The carpal tunnel is an anatomical compartment located at the base of the palm. Nine flexor tendons and the median nerve pass through the carpal tunnel that is surrounded on three sides by the carpal bones that form an arch. The median nerve provides feeling or sensation to the thumb, index finger, long finger, and half of the ring finger.
Indication of the site of the problem in carpal tunnel syndrome. In carpal tunnel syndrome, one of the tendons or tissues in the carpal tunnel is inflamed, swollen, or fibrotic and puts pressure on the other structures in the tunnel, including the median nerve. Carpal tunnel syndrome is the most commonly reported nerve entrapment syndrome. [2]
Toggle Structure subsection. 1.1 Arm. 1.2 Forearm. 1.3 Hand. 1.4 Variation. 2 Function. ... The median nerve is the only nerve that passes through the carpal tunnel.
On the dorsal side of the hand, the palmar carpal ligament corresponds in location and structure to the extensor retinaculum, both being formations of the antebrachial fascia and therefore continuous. Consequently, the flexor retinaculum is commonly referred to as the transverse carpal ligament to avoid confusion. [4]
Carpal tunnel syndrome is caused by compression of the median nerve at the carpal tunnel. The carpal tunnel is formed by the bones of the wrist and the transverse carpal ligament. Pressure can interrupt or arrest the microcirculatory environment of the nerve starting a pathophysiological cascade. [4] [2] As the heart beats, it pushes blood ...
The pisiform bone is most recognizable as an unassuming palmar projection forming the heel of human hand. [2]The pisiform bone, along with the hamulus of the hamate, defines the medial boundary of the carpal tunnel [2] because the pisiform body acts as one of the four attachments points of the flexor retinaculum. [3]
The fibers end in a flattened tendon, which passes beneath the flexor retinaculum of the hand through the carpal tunnel. It is then lodged between the lateral head of the flexor pollicis brevis and the oblique part of the adductor pollicis , and, entering an osseo aponeurotic canal similar to those for the flexor tendons of the fingers, is ...