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An atonic seizure (also called drop seizure, akinetic seizure, astatic seizure, or drop attack) is a type of seizure that consists of partial or complete loss of muscle tone that is caused by temporary alterations in brain function. These seizures are brief – usually less than fifteen seconds.
Atonic may refer to: In music: Atonality, lack of a key or tonal center; In medicine: Atony, a muscle losing its strength; In linguistics: Atonic or unaccented, a ...
Myoclonic astatic epilepsy (MAE), also known as myoclonic atonic epilepsy or Doose syndrome, and renamed "Epilepsy with myoclonic-atonic seizures" in the ILAE 2017 classification, is a generalized idiopathic epilepsy. It is characterized by the development of myoclonic seizures and/or myoclonic astatic seizures. Some of the common monogenic ...
Atonic seizures are a brief 0.5-2 second lapses in muscle tone commonly leading to a fall. [6] Epileptic spasm seizures are brief 1-2 second proximal limb and truncal flexion or extension movements, often repeated. [6] Hyperkinetic seizures occur as high amplitude truncal and limb movements such as pedaling, thrashing, and rocking movements. [7]
Absence with atonic components. Here there may be a diminution in tone of muscles subserving posture as well as in the limbs leading to dropping of the head, occasional slumping of the trunk, dropping of the arms, and relaxation of the grip. Rarely tone is sufficiently diminished to cause this person to fall. [citation needed]
Atonality in its broadest sense is music that lacks a tonal center, or key. [1] Atonality, in this sense, usually describes compositions written from about the early 20th-century to the present day, where a hierarchy of harmonies focusing on a single, central triad is not used, and the notes of the chromatic scale function independently of one another. [2]
The postictal state is the altered state of consciousness after an epileptic seizure.It usually lasts between 5 and 30 minutes, but sometimes longer in the case of larger or more severe seizures, and is characterized by drowsiness, confusion, nausea, hypertension, headache or migraine, and other disorienting symptoms.
Generalized epilepsy is a form of epilepsy characterised by generalised seizures with no apparent cause. [1] Generalized seizures, as opposed to focal seizures, are a type of seizure that impairs consciousness and distorts the electrical activity of the whole or a larger portion of the brain (which can be seen, for example, on electroencephalography, EEG).