Jeremy Altman

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Rats with X-irradiation-produced degranulation of the hippocampal dentate gyrus were trained in the acquisition and reversal of simultaneous visual and tactile discriminations in a T-maze. These experiments employed the same treatment, apparatus, and procedure but varied in task difficulty. In the brightness and roughness discriminations, the irradiated(More)
The region of the cerebellum was X-irradiated in infant rats with selected exposure schedules designed to produce animals in which the cerebellar cortex was (a) essentially normal except for agenesis of late forming granule cells with axons situated in the uppermost molecular layer (12--15X), (b) lacking in stellate cells, with a severe reduction in granule(More)
Early treatment of occult spinal dysraphism may prevent progressive neurological deficits. However, diagnosis is often delayed until the onset of irreversible neurological damage. A review of data from the literature and patients at Johns Hopkins Hospital suggests that lumbosacral skin abnormalities such as tufts of hair, hemangiomas, lipomas, skin tags, or(More)
OBJECTIVE To investigate an outbreak of gram-negative folliculitis in relation to a common exposure, mud wrestling, and identify risk factors for dermatitis among those who mud wrestled. DESIGN Case-control study. SETTING University of Washington, Seattle. PARTICIPANTS Two college-residence groups of students. RESULTS Cultures from affected students(More)
Sclerosteosis is an autosomal recessive disorder characterized by bony overgrowth of the skull and tubular bones. The term was first introduced by Hansen in 1967. Until then, scierosteosis was thought to be a variant of osteopetrosis. Although the radiographic findings of this rare disorder have been described, highresolution computed tomographic (CT)(More)