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In an effort to understand the cause of cataracts—beyond the normal wear-and-tear of aging, smoking, and exposure to UV rays, all of which can damage a lens’ fiber cells—researchers are ...
Posterior capsular opacification, also known as after-cataract, is a condition in which months or years after successful cataract surgery, vision deteriorates or problems with glare and light scattering recur, usually due to thickening of the back or posterior capsule surrounding the implanted lens, so-called 'posterior lens capsule opacification'.
A catastrophic injury is a severe injury to the spine, spinal cord, or brain. [1] It may also include skull or spinal fractures. [2] This is a subset of the definition for the legal term catastrophic injury, which is based on the definition used by the American Medical Association.
The specific causes of neurological problems vary but can include genetic disorders, congenital abnormalities or disorders, infections, lifestyle, or environmental health problems such as pollution, malnutrition, brain damage, spinal cord injury, nerve injury, or gluten sensitivity (with or without intestinal damage or digestive symptoms).
Conversely, a lower motor neuron lesion affects nerve fibers traveling from the anterior horn of the spinal cord or the cranial motor nuclei to the relevant muscle(s). [ 1 ] Upper motor neuron lesions occur in the brain or the spinal cord as the result of stroke , multiple sclerosis , traumatic brain injury , cerebral palsy , atypical ...
High levels of intracellular Ca 2+, the major cause of post-injury cell damage, [30] destroy mitochondria, [11] and trigger phospholipases and proteolytic enzymes that damage Na+ channels and degrade or alter the cytoskeleton and the axoplasm. [31] [26] Excess Ca 2+ can also lead to damage to the blood–brain barrier and swelling of the brain ...
Congenital conditions and tumors that compress the cord can also cause SCI, as can vertebral spondylosis and ischemia. [5] Multiple sclerosis is a disease that can damage the spinal cord, as can infectious or inflammatory conditions such as tuberculosis, herpes zoster or herpes simplex, meningitis, myelitis, and syphilis. [12]
Neurogenic shock results from damage to the spinal cord above the level of the 6th thoracic vertebra. [5] It is found in about half of people who have a spinal cord injury within the first 24 hours, and usually persists for one to three weeks. [5] Neurogenic shock may be caused by severe brain injury. [6]