Previous research, although limited, suggests that both hypoxia and bed rest influence psychological responses by exaggerating negative psychological responses and attenuating positive emotions. The present study investigated the effect of a 21-day prolonged exposure to normobaric hypoxia and bed rest on affective responses and fatigue. Eleven healthy participants underwent three 21-day interve...

Diagnostic lumbar puncture was performed on 76 neurological inpatients. They were randomly allocated to one of four bed rest positions for four hours following the procedure (supine and horizontal, prone and horizontal, supine with head-down tilt and prone with head-down tilt) after which they were allowed to get up. There was no substantial or significant difference in the incidence of headach...

A model for the timing of human sleep is presented. It is based on a sleep-regulating variable (S)--possibly, but not necessarily, associated with a neurochemical substance--which increases during wakefulness and decreases during sleep. Sleep onset is triggered when S approaches an upper threshold (H); awakening occurs when S reaches a lower threshold (L). The thresholds show a circadian rhythm...

The treatment of tuberculosis, based as it is upon the concept of bed rest, has as its ultimate objective the restoration of the patient to a state of relative well-being and a capacity for participating in a program of work which is consistent with his handicap. For the physician who treats the tuberculous patient, for the others who are interested in the other aspects of his rehabilitation, a...

Countermeasures are defined as solutions to prevent the undesirable physiologic outcomes associated with spaceflight. Spaceflight analogs provide a valuable opportunity for the evaluation of countermeasures because they allow for the evaluation of more subjects, more experimental control, and are considerably less expensive than actual spaceflight. The various human analogs have differing stren...

OBJECTIVE To report our initial experience on the technical feasibility and safety for hemostasis of a new pneumatic compression device in patients undergoing femoral arteriotomy. MATERIALS AND METHODS This study included 40 consecutive patients in whom hemostasis after transfemoral catheterization was readered by using a pneumatic compression device consisting of an inflatable bulb-containin...

Two potential mechanisms, reduced skin blood flow (SBF) and sweating rate (SR), may be responsible for elevated intestinal temperature (T(in)) during exercise after bed rest and spaceflight. Seven men underwent 13 days of 6 degrees head-down bed rest. Pre- and post-bed rest, subjects completed supine submaximal cycle ergometry (20 min at 40% and 20 min at 65% of pre-bed rest supine peak exercis...

The calculation of the correlation dimension (D2) was applied to the study of the profiles of EEG slow-wave activity in nine narcoleptic subjects and nine sex- and age-matched control subjects who, following a baseline night recording, were maintained on 16 h of diurnal sleep deprivation and, thereafter, submitted to a 32-h bed rest protocol. The reversibility test allowed us to reject the null...

The current study presents a navigated transforaminal lumbar interbody fusion (TLIF) technique that requires only a 4-cm incision to accomplish a single-level TLIF. The authors compared its efficacy and efficiency with those of conventional TLIF. Forty patients who were indicated for single-level lumbar fusion were included and randomized to either the navigated-TLIF group or the conventional-T...