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The flexor pollicis longus (/ ˈ f l ɛ k s ər ˈ p ɒ l ɪ s ɪ s ˈ l ɒ ŋ ɡ ə s /; FPL, Latin flexor, bender; pollicis, of the thumb; longus, long) is a muscle in the forearm and hand that flexes the thumb. It lies in the same plane as the flexor digitorum profundus. This muscle is unique to humans, being either rudimentary or absent in ...
The thenar eminence refers to the group of muscles on the palm at the base of the thumb. The three muscles composing the thenar eminence are the abductor pollicis brevis, flexor pollicis brevis and opponens pollicis. [5] The other two muscles that influences movement of the thumb are the adductor pollicis and the first dorsal interosseous muscle.
the flexor pollicis longus: ... The length of the palmar aspect decreases during flexion while the dorsal aspect increases by about 24 mm. The useful range of motion ...
flexor pollicis longus, flexor pollicis brevis: 2 1 opponens pollicis: Upper limb, Hand, Lateral volar, Thenar trapezium, transverse carpal ligament: metacarpal bone of thumb on its radial side superficial palmar arch: median nerve: opposes thumb: 2 1 flexor pollicis brevis: Upper limb, Hand, Lateral volar, Thenar trapezoid, flexor retinaculum
A ventral forearm muscle, the flexor pollicis longus (FPL) originates on the anterior side of the radius distal to the radial tuberosity and from the interosseous membrane. It passes through the carpal tunnel in a separate tendon sheath, after which it lies between the heads of the flexor pollicis brevis. It finally attaches onto the base of ...
Frequently, the flexor pollicis longus arises from the lower part of the coronoid process by a rounded bundle of muscular fibers. The semilunar notch is a large depression, formed by the olecranon and the coronoid process, and serving as articulation with the trochlea of the humerus. About the middle of either side of this notch is an ...
Linburg–Comstock variation is an occasional tendinous connection between the flexor pollicis longus and the flexor digitorum profundus of the index, the middle finger or both. It is found in around 21% of the population. [1] It is an anatomical variation in humans, which may be viewed as a pathology if it causes symptoms. It was recognised as ...
opponens pollicis muscle; abductor pollicis brevis muscle; superficial part of flexor pollicis brevis muscle; A separate, more proximal branch of the median nerve additionally provides motor innervation to the 1st and 2nd lumbricals of the hand. All other intrinsic muscles of the hand receive motor innervation via the ulnar nerve. [2]