Alexander's law
Alexander's Law
Alexander's Law (pronunciation: al-ig-zan-der's law) is a principle in neurology that describes a particular characteristic of nystagmus, a condition characterized by involuntary eye movements.
Etymology
The law is named after British neurologist John Alexander, who first described the phenomenon in 1912.
Definition
According to Alexander's Law, the intensity of nystagmus increases when the eyes move in the direction of the fast phase. This means that if the fast phase of nystagmus is to the right, the nystagmus will be more intense when the person looks to the right.
Related Terms
- Nystagmus: An involuntary eye movement, which may cause the eye to rapidly move from side to side, up and down, or in a circle.
- Fast phase: The rapid, jerky movement of the eyes in nystagmus.
- Slow phase: The slow, drift movement of the eyes in nystagmus.
- Gaze-evoked nystagmus: A type of nystagmus that is caused by the act of looking to the side.
- Neurology: The branch of medicine dealing with disorders of the nervous system.
See Also
External links
- Medical encyclopedia article on Alexander's law
- Wikipedia's article - Alexander's law
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