What are the Lumbrical muscles of the hand? The four short intrinsic muscles of the hand that are arranged between the metacarpal bones and deep into the palmar fascia are referred to as the lumbrical muscles due to their worm-like appearance (lumbrical meaning in Latin is earthworm). The lumbrical muscles are one of the short…
What is Palmaris brevis muscle? The palmaris brevis is a small quadrangular muscle in the hand’s hypothenar area. Even though it is in this area, the palmaris brevis is not part of the hypothenar muscle group; rather, it is considered an exceptional superficial muscle of this area on its own. This muscle tightens the palmar…
What is Extensor pollicis brevis muscle? The extensor pollicis brevis muscle is a skeletal muscle located in the forearm that is responsible for extending the thumb at the carpometacarpal joint (base of the thumb). It originates from the distal third of the posterior surface of the ulna bone and the interosseous membrane, and inserts into…
What is Abductor pollicis longus muscle? The muscle known as the abductor pollicis longus can be found in the forearm’s posterior compartment. Along with the supinator, extensor pollicis brevis, extensor pollicis longus, and extensor indicis, it is one of the forearm’s five deep extensors. All of the deep extensor muscles, except for the supinator, cross…
What is Extensor carpi radialis brevis muscle? The fusiform muscle known as the extensor carpi radialis brevis can be found in the parallel section of the back lower arm. Along with the anconeus, brachioradialis, extensor carpi radialis longus, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris, it is a member of the superficial forearm…
What is the Extensor digiti minimi muscle? The extensor digiti minimi muscle, which is long and thin, is located in the posterior forearm. It reaches the fifth digit from the distal humerus. It is an individual from the shallow lower arm extensor bunch alongside the anconeus, brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis,…
What is the Supinator muscle? The supinator muscle is a muscle located in the forearm that plays an important role in the movement of the radius bone of the forearm. It arises from the lateral epicondyle of the humerus (upper arm bone) and the supinator crest of the ulna (one of the two bones in…
What is Opponens pollicis muscle? The hand’s short intrinsic muscle is called the Opponens Pollicis. Along with the adductor pollicis, abductor pollicis, and flexor pollicis brevis, it is a member of the thenar muscles group. The thenar eminence is an elevation that is created by the thenar muscles on the radial (lateral) side of the…
What is Adductor pollicis muscle? The adductor pollicis muscle is a hand muscle located in the palm of the hand, specifically at the base of the thumb. It has two parts: the oblique head and the transverse head. The oblique head originates from the capitate bone and the bases of the second and third metacarpal…
What is Abductor pollicis brevis muscle? The abductor pollicis brevis muscle is a small, triangular muscle located in the hand. It is one of the intrinsic muscles of the hand, meaning that it originates and inserts within the hand itself. As its name suggests, the primary function of the abductor pollicis brevis muscle is to…
