– Discussion: – traditional quadrilateral socket has narrow anteroposterior diameter to keep the ischium positioned back and up on top of the posterior brim of the socket for wt bearing; – anterior wall of the socket is 5 to 7 cm higher than the posterior wall to hold the leg back … Read more
– Discussion: – quantitative CT is unique in that it can determine both bone density and distribution in three dimensions at any skeletal site; – bone density can be estimated separately in trabecular and cortical bone compartments; – generally performed at the lumbar spine using routine … Read more
origin: iliolumbar ligament, posterior part of the iliac crest; insertion: inferior border of the first rib and transverse process of the upper 4 lumbar vertebrae; action: pure lateral flexion of lumbar vertebral column; helps action of the diaphram in inspiration; nerve supply: Lumbar Plexus, T12, L1, L2, L3
– Discusison: – not to be confused w/ pyogenic granuloma – poorly understood papulovesicular skin disorder involving ulcerations and necrosis which usually occurs along w/ an underlying systemic disease; – concomitant ulcerative colitis occurs in 30 – 60% of infected patients; – other … Read more
– Puncture of Shoulder Joint: – posterior approach gives easy access to glenohumeral joint & avoids risk of damaging brachial plexus or cephalic vein; – pt should be seated & entire shoulder, both anterior & posterior, should be prepped and draped; – palpate most lateral edge of the acromion … Read more
– Discussion: – pediatric pseudosubluxation refers to normal mobility of C-2 on C-3 in flexion which may be so pronounced as to be mistaken for pathologic motion; (is normal in children < 8 years old); – prevalence: … Read more
– Anatomy: – origin: anterior surface of transverse process, lateral border of vertebral bodies and corresponding intervertebral discs of T12-L5; – at the 3 o’clock position, the iliopsoas is composed of 45% tendon and 55% muscle; – tendon is located directly anterior to the anterior superior capsulolabral complex at the 2-3 … Read more
– Discussion: – function of the PTFJ – accept 1/6 the axial load of the leg – resist torsional stresses originating from the ankle – resist tensile forces created with weight bearing – resists lateral bending forces – subluxation is common in preadolescent … Read more
– See: Achondroplasia – Discussion: – autosomal dominant disorder which occurs as a result of a mutation of a calmodulin like calcium binding protein; – result is abnormal proteoglycan accumulation in the chondrocyte rough endoplasmic reticulum; – there are moderate to severe epiphyseal, metaphyseal, and physeal abnormalities in long … Read more
– See: Congenital Pseudarthrosis of Tibia – Classification into “Stiff” and “Lax” Pseudoarthrosis: – stiff pseudoarthrosis: – bone ends are hypertrophic – hypertrophic non union should first be compressed for 2-3 weeks, followed by gradual distraction; – Lax Non Union: – lax nonunion … Read more