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E D Weitzman

Publications and source records attributed to E D Weitzman.

129 records · Page 8Linked to original sources
PubMedDate not supplied

Circadian rhythms in human performance efficiency under free-running conditions.

A series of four experiments is described in which two men and two women (age range 22-79 years) were allowed to 'free-run' under conditions of isolation from all time cues. The circadian rhythms of performance efficiency were studied for three tasks: serial search, verbal reasoning, and manual dexterity (left and right hand versions). Strong evidence was obtained to suggest that different tasks are under the control of different circadian oscillators. The circadian rhythm in verbal reasoning performance tends to run at a shorter circadian period than that in more simple repetitive tasks, and slight differences in circadian behavior can occur between left- and right-handed dexterity.

Adult↗
PubMedDate not supplied

The differential diagnosis of impotence. The measurement of nocturnal penile tumescence.

The literature on nocturnal penile tumescence (NPT) and impotence is briefly reviewed. Available evidence suggests that measurement of NPT provides objective data, which when combined with a thorough clinical evaluation can be helpful in distinguishing psychogenic from organic impotence in approximately 80% of those patients who present this differential diagnostic problem. Further research is needed to determine whether some psychogenically impotent patients may have impaired NPT. The interdisciplinary evaluation employed at our center is described, and clinical material illustrating the usefulness of this technique is presented. The potential errors that can result from the use of portable NPT monitoring devices are discussed.

Adult↗