A study in the October 1, 2009 issue of the journal Sleep shows elderly women sleep better than elderly men even though women consistently report their sleep is shorter and poorer. Women reported less and poorer sleep than men on all of the subjective measures, including a 13.2 minute shorter total sleep time (TST), 10.1 minute longer sleep onset latency (SOL), and a 4.2 percent lower sleep efficiency.
Can’t sleep at night? A new study published in the journal Sleep has found people who suffer from insomnia have higher night-time blood pressure, which can lead to cardiac problems.
The investigation, which measured the 24-hour blood pressure of insomniacs compared to sound sleepers, was conducted by researchers from the Université de Montréal, its affiliated Hôpital du Sacré-Cour de Montréal Sleep Disorders Centre, and the Université Laval.
A recently published study demonstrates maternal smoking is associated with an impaired infant arousal process that may increase the risk for sudden infant death syndrome (SIDS). The authors suggest maternal smoking has replaced stomach sleeping as the greatest modifiable risk factor for SIDS.
Results show that the progression from sub-cortical activation to cortical arousal was depressed in smoke-exposed infants, who had lower proportions of full cortical arousals from sleep and higher proportions of sub-cortical activations than infants born to non-smoking mothers.
A study published in the December 1, 2008 issue of the journal Sleep shows the use of light exposure therapy, dark sunglasses, and a strict sleep schedule can help night-shift workers create a “compromise circadian phase position” which may result in increased performance and alertness during night shifts, yet still allow for adequate nighttime sleep on days off.
Results from the study show the performance was better for the experimental subjects than the control subjects. When the phase delays of the experimental group had likely reached the compromise circadian position, performance for this group was close to the level during day shifts, demonstrating fast reaction times with low variability and few or no lapses.
Research engineers and sleep medicine specialists from two Michigan universities have joined technical and clinical hands to put innovative quantitative analysis, signal-processing technology and computer algorithms to work in the sleep lab. One of their recent findings is that a new approach to analyzing sleep fragmentation appears to distinguish fibromyalgia patients from healthy controls.
Joseph W. Burns, a research scientist and engineer at the Michigan Tech Research Institute (MTRI); Ronald D. Chervin, director of the University of Michigan’s Michael S. Aldrich Sleep Disorders Laboratory; and Leslie Crofford, director of the Center for the Advancement of Women’s Health at the University of Kentucky, report the results of their study in the August 2008 issue of the journal Sleep Medicine.
A neuro-imaging study in the Sept. 1, 2008 issue of the journal Sleep is the first to find that cognitive processes related to verbal fluency are compromised in people with insomnia despite the absence of a behavioral deficit. These specific brain function alterations can be reversed, however, through non-pharmacological treatment with sleep therapy.
Results of functional magnetic resonance imaging (fMRI) scanning during verbal fluency tasks show that people with insomnia have less activation than controls in the left medial prefrontal cortex and the left interior frontal gyrus, two fluency-specific brain regions. However, participants with insomnia generated more words than controls on both the category fluency task
A study published in the July 1, 2008, issue of the journal Sleep provides visual evidence of the severe structural damage that occurs in numerous regions of the brain in people with obstructive sleep apnea (OSA).
Results show that obstructive sleep apnea patients have extensive alterations in “white matter,” nerve tissue in the brain containing fibers that are insulated with myelin — a white, fatty sheath. These structural changes appear both in brain regions that have functional importance for characteristics such as mood, memory, and cardiovascular regulation; and in fiber pathways interconnecting these regions.
A study published in the May 1, 2008 issue of the journal Sleep is the first attempt to quantify the strength of the cross-sectional relationships between duration of sleep and obesity in both children and adults. Cross-sectional studies from around the world show a consistent increased risk of obesity among short sleepers in children and adults, the study found.
Patients who snore or have other symptoms of sleep apnea often undergo testing in a sleep laboratory to measure the number of breathing pauses and arousals that occur while they slumber. But doctors find these tests do not effectively predict daytime consequences suspected to arise from sleep apnea, such as sleepiness in adults or hyperactivity in children.
Now, neurologists at the University of Michigan Health System and engineers at Altarum Institute in Ann Arbor, Mich., have discovered evidence that the disruption of sleep in sleep apnea may be much more frequent than the breathing pauses, or apneas, themselves.
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As of May 2, 2009 at 9:47 p.m. (-0500) (ET), the U.S. population
was 306,340,710. Sleep researchers estimate approximately seven percent
of the population suffers from obstructive sleep apnea. Using that
estimate, there are potentially 21,443,850 apneics in the U.S.
~~ Apnea around the world ~~
As of May 2, 2009 at 9:47 p.m. (-0500) (ET), the world population
was 6,777,286,604. Sleep researchers estimate approximately seven percent
of the population suffers from obstructive sleep apnea. Using that
estimate, there are potentially 474,410,062 apneics in the world.
