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Bly responsible for its occurrence. The release of certain neurotransmitters, the monoamines (norepinephrine, serotonin and histamine), is completely shut down during rem. This causescitation needed rem atonia, a state in which the motor neurons are not stimulated and thus the body's muscles do not move. take both viagra and viagra together Lack of such rem atonia causes rem behavior disorder; sufferers act out the movements occurring in their dreams. Heart rate and breathing rate are irregular during rem sleep, again similar to the waking hours. viagra without a dosctor prescription Body temperature is not well regulated during rem. viagra online Erections of the penis (nocturnal penile tumescence or npt) normally accompany rem sleep. natural supplements for viagra If a male has erectile dysfunction (ed) while awake, but has npt episodes during rem, it would suggest that the ed is from a psychological rather than a physiological cause. buy viagra online In females, erection of the clitoris (nocturnal clitoral tumescence or nct) causes enlargement, with accompanying vaginal blood flow and transudation (i. compare viagra viagra or viagra E. http://buycheapgenericviagraonlinecanada.com Lubrication). natural supplements for viagra During a normal night of sleep the penis and clitoris may be erect for a total time of from one hour to as long as three and a half hours during rem. According to one theory, certain memories are consolidated during rem sleep. cheap generic viagra Numerous studies have suggested that rem sleep is important for consolidation of procedural memory and spatial memory. (slow-wave sleep, part of non-rem sleep, appears to be important for declarative memory. cheap quality viagra ) a recent study shows that artificial enhancement of the non-rem sleep improves the next-day recall of memorized pairs of words. Tucker et al. viagra price per pill Demonstrated that a daytime nap containing solely non-rem sleep enhances declarative memory but not procedural memory. viagra 6 free samples The role of rem sleep in memory, however, is not without its doubts. Monoamine oxidase (mao) inhibitors and tricyclic antidepressants can suppress rem sleep, yet these drugs show no evidence of impairing memory. On the contrary, some studies show mao inhibitors improve memory. Moreover, one case study of an individual who had little or no rem sleep due to a shrapnel injury to the brainstem did not find the individual's memory to be impaired. natural supplements for viagra Intimately related to views on rem function in memory.

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