Regions of visual texture can be automatically segregated from one another when they abut but also discriminated from one another if they are separated in space or time. A difference in mean orientation between two textures serves to facilitate their segmentation, whereas a difference in orientation variance does not. The present study further supports this notion, by replicating the findings o...

RAG1 protein is essential for the activation of V(D)J recombination in developing lymphocytes (V, variable; D, diversity; J, joining). However, it has not been determined whether its role involves substrate recognition and catalysis. A single amino acid substitution mutation in the RAG1 gene has now been identified that renders its activity sensitive to the sequence of the coding region abuttin...

668 defined, hemispherical, nontender, noncompressible, boggy swelling, abutting the lower margin of the plaque. A few satellite, hyperpigmented papules were present over the thighs in the periphery of the main lesion. The patient denied any history of bleeding or ulceration of the plaque. There was no evidence of sweating or excessive growth of lanugo hair over the plaque. Thrill and bruit wer...

Retrosternal dislocation of the clavicle is a rare injury that is easily overlooked. Significant complications can occur both immediately following the initial injury and in the long term. We report a case of a young male in which the medial aspect of the clavicle was dislocated deep into the pleura abutting the aortic arch. Knowledge of these injuries allows for early detection and interventio...