View source for Biology:Ictal

'''''Ictal period''''' refers to a physiologic state or event such as a [[Medicine:Seizure|seizure]], [[Medicine:Stroke|stroke]], or [[Medicine:Headache|headache]]. The word originates from the Latin word ''ictus'', meaning a blow or a stroke. In [[Biology:Electroencephalography|electroencephalography]] (EEG), the recording during a seizure is said to be "ictal". The following definitions refer to the temporal relation with seizures.<ref>{{Cite journal|last=Marco|first=Mula|last2=Francesco|first2=Monaco|title=Ictal and Peri-Ictal Psychopathology|journal=Behavioural Neurology|language=en|volume=24|issue=1|pages=21–5|doi=10.3233/ben-2011-0314|pmid=21447894|pmc=5377957|issn=0953-4180|year=2011}}</ref>

'''''Pre-ictal''''' refers to the state immediately before the actual seizure, stroke, or headache.

'''''Post-ictal''''' refers to the state shortly after the event.

'''''Interictal''''' refers to the period between seizures, or [[Medicine:Convulsion|convulsion]]s, that are characteristic of an [[Medicine:Epilepsy|epilepsy]] disorder.  For most people with epilepsy, the interictal state corresponds to more than 99% of their life. The interictal period is often used by neurologists when diagnosing epilepsy since an EEG trace will often show small interictal spiking and other abnormalities known by neurologists as subclinical seizures. Interictal EEG discharges are those abnormal waveforms not associated with seizure symptoms.

'''''Peri-ictal''''' encompasses pre-ictal, ictal and post-ictal.

==See also==
* Ictal headache
* [[Biology:Postictal state|Postictal state]]

==References==
{{Reflist}}

[[Category:Electroencephalography]]
[[Category:Medical terminology]]
[[Category:Neurophysiology]]

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