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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] Other significant effects include a slowing of cardiovascular system functions ...
The Romberg test is a test of the body's sense of positioning ( proprioception ), which requires healthy functioning of the dorsal columns of the spinal cord. [ 1] The Romberg test is used to investigate the cause of loss of motor coordination ( ataxia ). A positive Romberg test suggests that the ataxia is sensory in nature, that is, depending ...
Balance disorder. A balance disorder is a disturbance that causes an individual to feel unsteady, for example when standing or walking. It may be accompanied by feelings of giddiness, or wooziness, or having a sensation of movement, spinning, or floating. Balance is the result of several body systems working together: the visual system (eyes ...
brain injury. physical inactivity. depression. social isolation. hearing loss. lower levels of education. The Commission’s new report added high cholesterol after the age of 40 and vision loss ...
Diabetic retinopathy. Often asymptomatic, but can cause spots in the eye and vision loss. Diabetic retinopathy (also known as diabetic eye disease ), is a medical condition in which damage occurs to the retina due to diabetes. It is a leading cause of blindness in developed countries. Diabetic retinopathy affects up to 80 percent of those who ...
An American man with amyotrophic lateral sclerosis (ALS) has become the first patient in the world to use an Apple Vision Pro via an implantable brain-computer interface (BCI). This means the ...
People take vitamins for all kinds of reasons—from vitamins for stress to vitamin B12 supplements —but many add them to their routine with the hope of boosting longevity. However, new research ...
Specialty. Ophthalmology. Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. [ 1] Initial detachment may be localized, but without rapid treatment the entire retina may detach, leading to vision loss and blindness. It is a surgical emergency.