Data Trace Editor – Isometric Contraction: – w/ isometric (static) contraction, external muscle length does not change; – internally, however, within the fibril the distance between the Z-lines does shortens; – Isotonic Contraction: – is one in which constant internal force is produced, & muscle shortens; – it is also defined … Read more
– See: Muscle Menu – Two Major Fiber Types: type I and type II fibers; – in lower mammals and other animals, muscles are generally composed entirely type I or type II fibers; – human muscle is made up of a mixture of type I and type II fibers; – … Read more
– a series of pairs of muscles of small muscles extending the full length of the spine just superficial to the rotators and each spanning 2 or 3 intervertebral spaces before inserting; origin: posterior surface of the sacrum, the dorsal end of the iliac crest, the transverse processes of the lumbar and the thoracic vertebrae and the … Read more
– See: Bipartite Patellae: – Discussion: – multipartite patella may present diagnostic dilemma in child with anterior knee symptoms; – these often incidental radiographic findings have been classified into three types: – type I–at inferior pole (5 % of all lesions) – type II–at … Read more
– See: Bone Tumor Menu – Discussion: – an osteochondroma that results from a dysplasia of peripheral growth plate; – as its name implies, multiple hereditary exostosis is an inherited condition which produces multiple exostoses; – occurs in 1 out of 50,000 people; – … Read more
– Discussion: – originally was described by Ollier in late 1800s; – characterized by multiple enchondroma lesions primarily located w/ in the metaphyseal regions of tubular bones; – usually diagnosed in childhood; – pts w/ Ollier’s dz have increased risk of a secondary chondrosarcoma developing later in … Read more
Discussion multiple epiphyseal dysplasia (a common type of osteochondrodysplasia) is characterized by disturbance of normal ossification w/ in epiphysis; pathologic abnormality is a disturbance in enchondral ossification of epiphyses and physes; is inherited as an autosomal dominant trait with variable expressivity; disorder is manifested as multiple areas of abnormal growth and ossification of the epiphysis; … Read more
Volume 3, Number 3 – Fall 2013 Volume 3, Number 2 – Summer 2013 Volume 3, Number 1 – Spring 2013 Volume 2, Number 4 – Winter 2012 Volume 2, Number 3 – Fall 2012 Volume 2, Number 1 – Spring 2012 Volume 1, Number 4 – Winter 2012 Volume 1, Number 3 – Fall 2011 Volume 1, … Read more
– Discussion: – are characterized by a defect in metabolism of one or more mucopolysaccharides, w/ resulting excessive accumulation of these substances in the extracellular spaces of the connective tissues; – this group of disorders is characterized by a deficiency of specific lysosomal enzymes required for degradation of glycosaminoglycans; … Read more
– See: Hand Tumors – Discussion: – cystic lesion (actually a ganglion) over dorsum of finger near DIP & fingernail; – it is associated w/ degenerative lesions and spur formation (Heberden’s nodes) over DIP joint; – ganglion may or may not be connected to DIP joint by a synovial stalk; … Read more