Tremor

A tremor is an involuntary, somewhat rhythmic, muscle contraction and relaxation involving oscillations or twitching movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal folds, trunk, and legs. Most tremors occur in the hands. In some people, a tremor is a symptom of another neurological disorder. A very common tremor is the teeth chattering, usually induced by cold temperatures or by fear.

Causes

Tremor can be a symptom associated with disorders in those parts of the brain that control muscles throughout the body or in particular areas, such as the hands. Neurological disorders or conditions that can produce tremor including multiple sclerosis, stroke, traumatic brain injury, chronic kidney disease and a number of neurodegenerative diseases that damage or destroy parts of the brainstem or the cerebellum, Parkinson's disease being the one most often associated with tremor. Other causes include the use of drugs (such as amphetamines, cocaine, caffeine, corticosteroids, SSRI), alcohol, mercury poisoning; or the withdrawal of drugs such as alcohol or benzodiazepine. Tremors can also be seen in infants with phenylketonuria (PKU), overactive thyroid or liver failure. Tremors can be an indication of hypoglycemia, along with palpitations, sweating and anxiety. Tremor can also be caused from lack of sleep, lack of vitamins, or increased stress. Deficiencies of magnesium and thiamine have also been known to cause tremor or shaking, which resolves when the deficiency is corrected. See magnesium in biology. Some forms of tremor are inherited and run in families, while others have no known cause. Tremors can also be caused by some spider bites, e.g. the redback spider of Australia.

List of Mortal Kombat characters

This is a list of playable characters from the Mortal Kombat fighting game series and the games in which they appear. The series takes place in a fictional universe composed of six realms, which were created by the Elder Gods. The Elder Gods created a fighting tournament called Mortal Kombat to reduce the wars between the realms. The first Mortal Kombat game introduces a tournament in which Earthrealm can be destroyed if it loses once again.

The Earthrealm warriors manage to defeat the champion Goro and tournament host Shang Tsung, but this leads Tsung to search for other ways to destroy Earthrealm. Since then, every game features a new mortal who wishes to conquer the realms, therefore violating the rules of Mortal Kombat. By Mortal Kombat: Deception, most of the main characters had been killed by Shang Tsung and Quan Chi (neither of whom were playable in the game), but by Mortal Kombat: Armageddon all of them return.

Character overview

Appearances in the fighting games in the series:

Essential tremor

Essential tremor (ET, also referred to as benign tremor or familial tremor) is the most common movement disorder; its cause is unknown. It typically involves a tremor of the arms, hands or fingers but sometimes involving the head, vocal cords or other body parts during voluntary movements such as eating and writing. It is distinct from Parkinson's disease—and often misdiagnosed as such—although some individuals have both conditions. Essential tremor is commonly described as an action tremor (it intensifies when one tries to use the affected muscles) or postural tremor (present with sustained muscle tone) rather than a resting tremor, such as is seen in Parkinson’s, which is usually not included among its symptoms.

Classification

This type of tremor is often referred to as "kinetic tremor".

Essential tremor has been known as "benign essential tremor", but the adjective "benign" has been removed in recognition of the sometimes disabling nature of the disorder.

Signs and symptoms