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The flexor digitorum longus runs along the medial posterior side of the lower leg and aids in flexions of the toes (apart from the big toe). The flexor digitorum longus muscle arises from the posterior surface of the body of the tibia, from immediately below the soleal line to within 7 or 8 cm of its lower extremity, medial to the tibial origin of the tibialis posterior muscle.
The Phalanges of the Hand The flat, wide expansions found at the tips of the distal phalanges are called "apical tufts". They support the fingertip pads and nails. [ 11 ] The phalanx of the thumb has a pronounced insertion for the flexor pollicis longus (asymmetric towards the radial side), an ungual fossa, and a pair of unequal ungual spines ...
The fingers have two long flexors, located on the underside of the forearm. They insert by tendons to the phalanges of the fingers. The deep flexor attaches to the distal phalanx, and the superficial flexor attaches to the middle phalanx. The flexors allow for the actual bending of the fingers.
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It finally attaches onto the base of the distal phalanx of the thumb. It is innervated by the anterior interosseus branch of the median nerve (C7-C8) [3] Three dorsal forearm muscles act on the thumb: The abductor pollicis longus originates on the dorsal sides of both the ulna and the radius, and from the interosseous membrane.
Phalanges of the hand (28 bones in total, 14 on each hand) Proximal phalanges (10 bones in total; 5 on each side) Intermediate phalanges (8 bones in total; 4 on each side) Distal phalanges (10 bones in total; 5 on each side)
Joints of the hand, X-ray Interphalangeal ligaments and phalanges. Right hand. Deep dissection. Posterior (dorsal) view. The PIP joint exhibits great lateral stability. Its transverse diameter is greater than its antero-posterior diameter and its thick collateral ligaments are tight in all positions during flexion, contrary to those in the metacarpophalangeal joint.
At the extensor expansion, located at the base of the middle and distal phalanx of digit V on the dorsal side: Artery: Posterior interosseous artery: Nerve: Posterior interosseous nerve (C7, 8) Actions: Extends the wrist and the little finger at all joints: Antagonist: Flexor digiti minimi brevis: Identifiers; Latin: musculus extensor digiti ...