origin tuberosity of the scaphoid and the ridge of trapezium; another slip originates from the transverse carpal ligament; insertion Lateral surface of the base of the proximal phalanx of thumb; action abdcution and medial rotation of the metacarpal of the thumb; synergists abductor pollicis longus, EPL; nerve supply median nerve, C8, T1; Discussion although opposition … Read more
(see also: Plantar Muscles of the Foot) Origin medial process of the calcaneus, flexor retinaculum, plantar aponeurosis and intermuscular septum. Insertion joins with the medial tendon of the flexor hallucis brevis into the plantar half of the medial side of the base of the proximal phalanx of the great toe. Action Abducts the great toe … Read more
(see also: Plantar Muscles of the Foot, Innerv. Musc. Lower Limb) Origin: the lateral process of the tuberosity of calcaneus. Insertion: lateral side of the base of the proximal phalanx of the 5th toe. Action: Spreads the 5th toe away from the 4th toe. Nerve Supply: lateral plantar nerve, S1, S2
Anatomy origin: pisiform bone and from the tendon of the FCU ; insertion two slips; into ulnar side of the base of proximal phalanx of little finger; into ulnar border of aponeurosis of extensor digiti minimi expansion of finger extensor tendons; action abducts little finger & helps flex its proximal phalanx at MP joint; synergists … Read more
Discussion classic disease results from deficiency of factor VIII clotting activity; hemophilia A is not caused by an absolute deficiency of factor VIII, but from an abnormal molecule making up part of the VIII clotting factor; hemophilic arthropathy: pathologic changes (coag pathway / coag labs); inheritance pattern: sex-linked recessive; affected male will have normal sons … Read more
(see also: Therapeutic Principles & Anti-Gout Meds Discussion gout refers to articular dz of MSU deposits (tophi) in soft tissues. it is caused by deposition of monosodium urate crystals in poorly perfused tissues, as well as bursae, ligaments, articular cartilage, and synovial membranes; on average, a family history of gout can be obtained in less … Read more
(see also: Chondral Injuries: Nourishment) Discussion articular cartilage is avascular & is prevented from mounting a vascular response when there is isolated cartilage injury; absence of vessels w/ in cartilage imposes limitations on healing potential; indeed, some traumatic defects in cartilage apparently never heal; chondrocytes in articular cartilage are capable of cell division & are … Read more
(see also: Spondyloarthropathies) Discussion psoriasis affects 1-2 % of U.S. population & typically presents w/ well-defined erythematous scaly plaques; only a minority of pts with psoriasis develop arthritis; when arthritis develops, it most often is an asymmetrical oligoarthritis, which at times may be quite destructive; some patients may develop spondylitis (usually will have HLA-B27 antigen); … Read more
Discussion (see also synovial fluid) coefficient of friction for two surfaces can be thought of as degree of roughness that exists between two surfaces; where as solid friction is relatively independent of velocity of motion, fluid friction forces are sensitive to velocity & to lubricant film thickness; increase in joint velocity is not accompanied by … Read more
Discussion indicated for symptomatic soft tissue impingement, synovitis: specific lesions amenable to arthroscopic debridement include: osteochondral lesions; meniscoid lesion in anterolateral gutter; mass of fibrocartilagenous tissue arising from the tibio-fibular joint will protrude into the joint; patients will note anterolateral ankle pain, popping, and giving way; anterior impingement snydrome of the ankle thickening of antero-inferior … Read more