– Discussion: – distal epiphysis includes entire articular surface of distal end of femur & serves as origin of part of gastrocnemius muscle; – epiphyseal center of distal aspect of femur is present at birth in newborns, & it expands rapidly to fill both condylar regions. … Read more
– See: Arterial supply to Femur – Embryology of Proximal Femur: – upper end consists of head, neck, & greater & lesser trochanters at junction of the neck with the body; – develops from 4 separate ossification centers; – head forms roughly two-thirds of sphere whose surface is articular except for fovea capitis femoris where … Read more
– Discussion: – sesamoid bone w/ in quadriceps tendon; – cartilaginous posterior surface is divided by a rounded vertical ridge into a larger, lateral portion for articulation w/ lateral condyle of femur and smaller medial portion for articulation w/ medial condyle of femur; – w/ increasing knee flexion, contact … Read more
– Discussion: – proximal humerus ossifies from four centers: head, shaft, and both tubercles, which unite at age 19 to 20; – frx in adult life tend to occur along old epiphyseal lines; – depression between tubercles, bicipital groove, contains long head of biceps; – tubercles also … Read more
– See: Lisfranc’s Frx – Anatomy: – proximal end of the second metatarsal is tightly recessed between first and third cuneiforms; – this mortise configuration effectively locks entire tarsometarsal complex, preventing medial or lateral translation; – no significant dislocation of metatarsals or cuneiforms can occur unless this bone is disrupted; – for this reason, pure transmetatarsaltarsal … Read more
– See: Biomechanics of the ACL: – Discussion: – length of 38 mm (range 25 to 41 mm) – width of 10 mm (range 7 to 12 mm) – made up of multiple collagen fascicles; – surrounded by an endotendineum – microspocially: interlacing fibrils … Read more
– See – Normal Variants – Development of Atlas: – Atlantooccipital disassociation – Jefferson frx – Discussion: – C1 has no central body – C1 vertebra is ring of bone w/ large lateral masses that provide only two … Read more
– See: Ligaments of the Wrist – Anatomy of TFCC: – consists of articular disc (triangulyar fibrocartilage), meniscus homologue (lunocarpal), ulnocarpal ligament, dorsal & volar radioulnar ligament, and ECU sheath; – it originates from firm attachments on medial border of distal radius and inserts into the base of the ulnar styloid; … Read more
– See: role of knee joint in locomotion and mechanical axis – Discussion: – bones forming the knee joint are femur, tibia, & patella; – both left and right femurs converge toward knee and each tibia is nearly vertical, femur and tibia meet angle of some 5-12 deg; … Read more
– See: – Total Hip Replacement Menu: – total hip in DDH – acetabular component menu: – crowe classification – Anatomic Position – Discussion: – w/ low dislocation, attempts should be made for antatomic placement, but should also be considered w/ high dysplastic dislocation; – long term success … Read more