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Absence seizures cause a short loss of consciousness (just a few seconds) with few or no symptoms. The patient, most often a child, typically interrupts an activity and stares blankly. These seizures begin and end abruptly and may occur several times a day. Patients are usually not aware that they are having a seizure, except that they may be aware of "losing time."
Myoclonic seizures consist of sporadic jerks, usually on both sides of the body. Patients sometimes describe the jerks as brief electrical shocks. When violent, these seizures may result in dropping or involuntarily throwing objects.
Clonic seizures are repetitive, rhythmic jerks that involve both sides of the body at the same time.
Tonic seizures are characterized by stiffening of the muscles.
Atonic seizures consist of a sudden and general loss of muscle tone, particularly in the arms and legs, which often results in a fall.
(Produced by a small area of the brain)
|1. Simple (awareness is retained)
a. Simple Motor
b. Simple Sensory
c. Simple Psychological
|a. Jerking, muscle rigidity, spasms, head-turning
b. Unusual sensations affecting either the vision, hearing, smell taste or touch
c. Memory or emotional disturbances
(Impairment of awareness)
|Automatisms such as lip smacking, chewing, fidgeting, walking and other repetitive, involuntary but coordinated movements|
|3. Partial seizure with secondary generalization||Symptoms that are initially associated with a preservation of consciousness that then evolves into a loss of consciousness and convulsions.|