Search results
Results from the WOW.Com Content Network
American astronaut Marsha Ivins demonstrates the effects of microgravity on her hair in space. The effects of spaceflight on the human body are complex and largely harmful over both short and long term. [1] Significant adverse effects of long-term weightlessness include muscle atrophy and deterioration of the skeleton (spaceflight osteopenia). [2]
The onset of directed attention fatigue can be triggered by a number of activities involving the use of the brain's inhibitory system. Activities that engage this system include multitasking, [ 7 ] working in an environment with disruptive background noise, [ citation needed ] a lack of sleep, [ 8 ] and rapidly changing focus during a prolonged ...
Psychological and sociological effects of space flight are important to understanding how to successfully achieve the goals of long-duration expeditionary missions. Although robotic spacecraft have landed on Mars , plans have also been discussed for a human expedition , perhaps in the 2030s, [ 1 ] for a return mission.
In the brain, serotonin is a neurotransmitter and regulates arousal, behavior, sleep, and mood, among other things. [9] During prolonged exercise where central nervous system fatigue is present, serotonin levels in the brain are higher than normal physiological conditions; these higher levels can increase perceptions of effort and peripheral muscle fatigue. [9]
Confusion may result from drug side effects or from a relatively sudden brain dysfunction. Acute confusion is often called delirium (or "acute confusional state"), [4] although delirium often includes a much broader array of disorders than simple confusion. These disorders include the inability to focus attention; various impairments in ...
Netflix has released the trailer for its literary romance drama “Lonely Planet,” featuring an old-school-new-school paring of Laura Dern and Liam Hemsworth. According to the official logline ...
Dizziness can accompany certain serious events, such as a concussion or brain bleed, epilepsy and seizures (convulsions), stroke, and cases of meningitis and encephalitis. However, the most common subcategories can be broken down as follows: 40% peripheral vestibular dysfunction, 10% central nervous system lesion, 15% psychiatric disorder, 25% ...
Museum fatigue is a state of physical or mental fatigue caused by the experience of exhibits in museums and similar cultural institutions. The collection of phenomena that characterize museum fatigue was first described in 1916, [1] and has since received widespread attention in popular and scientific contexts. [2] [3] [4]