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A concussion, also known as a mild traumatic brain injury (mTBI), is a head injury that temporarily affects brain functioning. [9] Symptoms may include loss of consciousness; memory loss; headaches; difficulty with thinking, concentration, or balance; nausea; blurred vision; dizziness; sleep disturbances, and mood changes. [1]
Clouding of consciousness, also called brain fog or mental fog, [ 1 ][ 2 ] occurs when a person is slightly less wakeful or aware than normal. [ 3 ] They are less aware of time and their surroundings, and find it difficult to pay attention. [ 3 ] People describe this subjective sensation as their mind being " foggy ".
Older people are at especially high risk for dizziness, which can contribute to subsequent injuries and higher rates of mortality due to falls. [ 19 ] About 10% of people with PCS develop sensitivity to light or noise , about 5% experience a decreased sense of taste or smell, and about 14% report blurred vision. [ 18 ]
Delirium (formerly acute confusional state, an ambiguous term which is now discouraged) [1] is a specific state of acute confusion attributable to the direct physiological consequence of a medical condition, effects of a psychoactive substance, or multiple causes, which usually develops over the course of hours to days. [2][3] As a syndrome ...
Damage to the limbic system involves loss or damage to memory, and may include: [citation needed] loss or confusion of long-term memory prior to focal neuropathy (retrograde amnesia) inability to form new memories (anterograde amnesia) loss of, or reduced emotions ; loss of olfactory functions; loss of decision-making ability
The difference in memory between normal aging and a memory disorder is the amount of beta-amyloid deposits, hippocampal neurofibrillary tangles, or amyloid plaques in the cortex. If there is an increased amount, memory connections become blocked, memory functions decrease much more than what is normal for that age and a memory disorder is ...
Dizziness. Fatigue. Memory loss or difficulty focusing. Muscle weakness or stiffness. Numbness or tingling, often starting on one side of the body. Shakiness. Difficulty speaking or swallowing ...
Memory loss, the most common cognitive impairment among head-injured people, occurs in 20–79% of people with closed head trauma, depending on severity. [10] Post-traumatic amnesia (PTA), a confusional state with impaired memory, [ 11 ] is characterized by loss of specific memories or the partial inability to form or store new ones.