– See: – Infraspinatus: primary external rotator of humerus; – Posteior Deltoid – Teres Minor – Discussion: – the posterior rotator cuff is important for maintenance of necessary force couples in axial (transverse) and coronal planes. – preoperative muscle testing of the … Read more
– Mid-Shaft Humeral Fractures: – consider screw placement in the short frx segment first, since the longer fragment will be more forgiving for shorter or longer screw placement; – take care to avoid injury to axillary nerve proximally and the radial nerve distally; – proximal pin … Read more
– General Fixator Considerations: – fracture healing: – references: – Comparison of osteotomy healing under external fixation devices with different stiffness characteristics. – External skeletal fixation of canine tibial osteotomies. Compression compared with no compression. – Comparison of the effects of compression plates and external fixators on … Read more
– See: – Forearm Extensors: – Extensor Tendon Laceration – origin: lateral epicondyle of humerus; – tunnel IV: – narrow retinaculum over dorsum of wrist forms pulley system for extensor tendons; – above the wrist its four slips spread out joined together by juncturae; … Read more
– See: Forearm Extensors : – Anatomy: – origin: lateral condyle of humerus; – insertion: – this tendon inserts into the base of 3rd metacarpal and is in direct relationship with the ECRL, which inserts into the base of the 3rd metacarpal; … Read more
– Discussion: – in elderly pts w/ comminuted frx, excision of up to 50% of olecranon can be well tolerated (no instability) – if distal surface of semilunar notch of ulna & coronoid are not injured upto 80% of olecranon may be excised w/o producing instability; – … Read more
– See: – Knee Exam – Patellar Malalignment – Exam: – hemarthrosis – ligamentous laxity: – persons at risk for patellar instability may exhibit generalized ligamentous laxity & poorly developed vastus medialis; – if hyperlaxity is present, consider collagen disorder … Read more
– See: Bone Tumor Menu – Discussion: – prevalence: – it represents approx 7% of all primary bone malignancies; – second most common primary malignant bone tumor (behind osteosarcoma) (2.1 per 1 million children) – Ewing’s sarcoma is more common in males and is rare in blacks; – … Read more
– See: – Obstetrical Paralysis: – Upper Trunk Brachial Plexus Injuries in Adults; – Discussion: – most common birth related neuropraxia (about 48%); – lesion of C5 & C6 roots are usually produced by widening of the head shoulder interval (in some cases C7 is involved as … Read more
– See: Anterior Interosseous Nerve Sydrome: – Site of Proximal Forearm Compression; – supracondylar process of the humerus and struther’s ligament: – median nerve may be compressed as it passes under the bondy spur – pt c/o of weak hand grip and in pronating, … Read more