The Hip

Vastus Medialis

    – See quadriceps muscle; Origin: Lower 1/2 of the intertrochanteric lines, medial lip of linea aspera, upper part of medial supracondylar line, medial intermuscular septum          tendons of adductor magnus and adductor longus; Insertion: Medial border of the patella by the ligamentum patella into the tibia tuberosity; Action: Extends the leg at the knee … Read more

Vastus Intermedius

– See Quads Origin: Proximal 2/3 of the anterolateral surface of the femur, lower 1/2 of the linea aspera, upper part of the lateral supracondylar line;          Lateral intermuscular septum; Insertion: By tendons of the rectus and vastus muscles into the superior border of the patella and by the ligamentum patella into the       … Read more

Upper Extremity Prosthetics

– Terminal Devices:     – Functional Hooks vs. Cosmetic Hands;     – Hooks: Voluntary opening vs closing:        – voluntary opening:           – more popular & are recognized by their numbers of rubber bands (# is proportional to pinch strength, w/ 3 bands equal to about   … Read more

Undisplaced Olecranon Frx

– Definition:      – displacement of less than 2 mm;      – no increase in minimal degree of separation of 90 deg flexion of elbow;      – usually frx gaps dorsally, and some separation of fragments occurs, which leads to joint incongruity;            – dorsal gapping w/ displacement of … Read more

Ulnocarpal Impaction / Impingement Syndrome

– See: RU joint – Discussion:     – refers to impingement of the ulnar head against the carpi which can lead to TFCC tears and lunotriquetral ligament attrition;     – lunotriquetral ligament attrition may occur from compression and translation shear as the lunate becomes impinged against the ulnar head;     – causes:   … Read more

Ulnar Nerve in Elbow Trauma

– See:       – Ulnar Nerve:       – Cubital Tunnel Syndrome: – Discussion:     – ulnar nerve neuritis is a reported of operative treatment  for elbow frxs;     – one of complications of ORIF of elbow frxs is adherence of the ulnar nerve directly to medial epicondylar region w/ … Read more

Ulnar Variance

– Discussion:     – mean ulnar variance is 0.9 mm (range: 4.2 to 2.3 mm);     – functional anatomy:            – w/ neutral variance, 80% of load is born by radius and 20% by ulna;            – 2.5 mm increase in ulnar varience will increase … Read more