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The tendon to the index finger is accompanied by the tendon of extensor indicis, which lies on its ulnar side. On the back of the hand, the tendons to the middle, ring, and little fingers are connected by two obliquely placed bands, one from the third tendon passing inferior and laterally to the second tendon, and the other passing from the ...
The ED divides into four tendons which, with the EI tendons, go through the fourth tendon compartment of the dorsal carpal ligament. On the back of the hand, the ED tendons diverge to follow the fingers and the EI tendon joins the ulnar side of one of the ED tendons along the back of the index finger.
The abductor digiti minimi is the most variable hypothenar muscle, [4] and might be joined by accessory slips from the tendon of the flexor carpi ulnaris, the flexor retinaculum, the fascia of the distal forearm, or the tendon of the palmaris longus. Occasionally, the muscle is partially inserted onto the fifth metacarpal bone. [5]
Ligament anchoring procedures can restore ligament-bone connections via pins, which can be relied on for treatment of a damaged ulnar collateral ligament in gamekeeper's thumb. [4] On a case-to-case basis, interphalangeal joint deformities may also be surgically treated by pins, in order to correct their position in the digit.
The muscles of the hand are the skeletal muscles responsible for the movement of the hand and fingers. The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm ...
During hyperextension the accessory ligaments are lengthened while the proper ligaments are shortened. [3] As a result, the joint is stable during full flexion while the relaxed collateral ligaments allows lateral and rotation movements during extension. [4] The tendons of interosseous and lumbricales add to the lateral stability of the joint. [1]
In human anatomy, the annular ligaments of the fingers, often referred to as A pulleys, are the annular part of the fibrous sheathes of the fingers. Four or five such annular pulleys, together with three cruciate pulleys , form a fibro-osseous tunnel on the palmar aspect of the hand through which passes the deep and superficial flexor tendons .
Its tendon passes through a compartment of the extensor retinaculum, posterior to distal radio-ulnar joint, then divides into two as it crosses the dorsum of the hand, and finally joins the extensor digitorum tendon. All three tendons attach to the dorsal digital expansion of the fifth digit (little finger).