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Sixteen healthy volunteers underwent two 40-h constant posture protocols in a balanced crossover design.
We compared PVT performance in 16 young (8 men and 8 women, 20 31 years) and 16 elderly healthy subjects (8 men and 8 women, 57 74 years) during a 40-h sleep deprivation (SD, high sleep pressure) and a 40-h multiple nap protocol (NAP, low sleep pressure) under dim light and constant posture conditions in a balanced crossover design.
In one protocol, subjects are kept for multiple days under 'constant routine' conditions consisting of sustained wakefulness or scheduled sleep episodes under continuous dim light with constant posture and frequent isocaloric meals [16], [17].
The phase angles of entrainment between the 25% dim light melatonin onset (DLMOn25%) and bedtime and between the 25% dim light melatonin offset (DLMOff25%) and scheduled waketime during the constant posture (CP) protocol following the 23.5-h rest-activity cycles did not significantly change as compared to those phase angles during the baseline CP protocol (Figure 2A).
In the case of both patient groups the moderate subgroups consisted of children with malformations requiring no constant posture correction – namely wearing corset [Figure 1].
Similar(53)
Their constant posturing military patriotism has its limits.
Over the last week we have seen constant posturing, reminiscent of the Cold War days.
The barrage of criticism from some members of the city's art world put Mr. Deitch into what seemed like a constant defensive posture.
This involves removing all of the external factors that could influence their rhythms, so volunteers are kept in a constant, semi-recumbent posture for 40 hours in dim light and at a constant temperature.
To assure constant upper limb posture between the loaded and unloaded conditions, the subjects were asked to hold a light plastic panel replicating the barbell's shape.
Arthur's valiant fight against mental jumble — evident in the precision of his diction, the minor and constant corrections to his posture, his refusal to reveal himself with eye contact — is so touching as to suggest the whole human condition.
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