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Brain death is the permanent, irreversible, and complete loss of brain function, which may include cessation of involuntary activity necessary to sustain life. [1] [2 ...
A concussion, also known as a mild traumatic brain injury (mTBI), is a head injury that temporarily affects brain functioning. [8] Symptoms may include headache, dizziness, difficulty with thinking and concentration, sleep disturbances, mood changes, a brief period of memory loss, brief loss of consciousness; problems with balance; nausea; blurred vision; and mood changes.
A neurodegenerative disease is caused by the progressive loss of neurons, in the process known as neurodegeneration. [ 2 ] [ 3 ] Neuronal damage may also ultimately result in their death . Neurodegenerative diseases include amyotrophic lateral sclerosis , multiple sclerosis , Parkinson's disease , Alzheimer's disease , Huntington's disease ...
Memory loss, the most common cognitive impairment among head-injured people, occurs in 20–79% of people with closed head trauma, depending on severity. [154] People who have had TBI may also have difficulty with understanding or producing spoken or written language, or with more subtle aspects of communication such as body language. [90]
The controversy surrounding the existence of second impact syndrome may play a role in the known and recorded incidence. [40] The United States seemingly has far more reported cases of second-impact syndrome than elsewhere. [40] The patients affected most often include young adults and adolescents that are 16 to 19 years old. [40]
According to Mayo Clinic, another stage is mild cognitive impairment, in which people may have issues with memory, finding the right words, or impaired judgment, but they usually can go about ...
The earliest warning signs of Alzheimer's disease include memory loss that impacts your daily functioning, vision and language issues, social withdrawal, and more.
This disease is characterized by loss of memory and intellectual function and by changes in mood. These changes encompass what are known as executive functions of the brain. [4] It usually presents between 54 and 66 years of age, and the first symptoms are usually mental deterioration or stroke. [5]