Medical

Medical

222 bookmarks
Custom sorting
Coupled electrophysiological, hemodynamic, and cerebrospinal fluid oscillations in human sleep
Coupled electrophysiological, hemodynamic, and cerebrospinal fluid oscillations in human sleep
During non–rapid eye movement sleep, low-frequency oscillations in neural activity support memory consolidation and neuronal computation. Sleep is also associated with increased interstitial fluid volume and clearance of metabolic waste products. It is unknown why these processes co-occur and how they are related. Fultz et al. simultaneously measured electrophysiological, hemodynamic, and flow signals in the human brain (see the Perspective by Grubb and Lauritzen). Large oscillations of fluid inflow to the brain appeared during sleep and were tightly coupled to functional magnetic resonance imaging signals and entrained to electroencephalogram slow waves. Slow oscillatory neuronal activity thus leads to oscillations in blood volume, drawing cerebrospinal fluid into and out of the brain. Science , this issue p. [628][1]; see also p. [572][2] Sleep is essential for both cognition and maintenance of healthy brain function. Slow waves in neural activity contribute to memory consolidation, whereas cerebrospinal fluid (CSF) clears metabolic waste products from the brain. Whether these two processes are related is not known. We used accelerated neuroimaging to measure physiological and neural dynamics in the human brain. We discovered a coherent pattern of oscillating electrophysiological, hemodynamic, and CSF dynamics that appears during non–rapid eye movement sleep. Neural slow waves are followed by hemodynamic oscillations, which in turn are coupled to CSF flow. These results demonstrate that the sleeping brain exhibits waves of CSF flow on a macroscopic scale, and these CSF dynamics are interlinked with neural and hemodynamic rhythms. [1]: /lookup/doi/10.1126/science.aax5440 [2]: /lookup/doi/10.1126/science.aaz5191
·science.sciencemag.org·
Coupled electrophysiological, hemodynamic, and cerebrospinal fluid oscillations in human sleep
American Migraine Foundation
American Migraine Foundation
The American Migraine Foundation provides education, support and resources for the millions of men, women and children living with migraine.
·americanmigrainefoundation.org·
American Migraine Foundation
How addiction hijacks the brain
How addiction hijacks the brain
Addiction exerts a long and powerful influence on the brain that manifests in three distinct ways: craving for the object of addiction, loss of control over its use, and continuing involvement with it despite adverse consequences. While overcoming ad...
·health.harvard.edu·
How addiction hijacks the brain
Trial By Error: Kaiser Permanente Changes Course
Trial By Error: Kaiser Permanente Changes Course
By David Tuller, DrPH Over the years, I’ve slammed U.S. medical and health care institutions that have championed the GET/CBT treatment paradigm for the illness or cluster of illnesses variously known as ME, CFS, ME/CFS or CFS/ME. I have done this both before and after the U.S. Centers for Disease Control and Prevent
·virology.ws·
Trial By Error: Kaiser Permanente Changes Course
Everything You Know About Obesity Is Wrong
Everything You Know About Obesity Is Wrong
For decades, the medical community has ignored mountains of evidence to wage a cruel and futile war on fat people, poisoning public perception and ruining millions of lives. It's time for a new paradigm.
·highline.huffingtonpost.com·
Everything You Know About Obesity Is Wrong
Watch trailer for Out of My Head, the documentary film about Migraine
Watch trailer for Out of My Head, the documentary film about Migraine
In Out of My Head, a filmmaker, seeking treatment for her daughter's migraine attacks, discovers a confounding neurological disease and learns why a devastating condition, afflicting nearly a billion people worldwide, remains so deeply misunderstood.
·outofmyheadfilm.com·
Watch trailer for Out of My Head, the documentary film about Migraine