Difference between revisions of "TIRDA (temporal intermittent rhythmic delta activity)"
From EEGpedia
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*Short burst of rhythmic delta activity in the temporal region | *Short burst of rhythmic delta activity in the temporal region | ||
*Amplitude of 50-100 microV | *Amplitude of 50-100 microV | ||
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*The TIRDA can be more specified with the '''prevalence''', '''duration''', '''frequency''', '''amplitude''', '''stimulus-induced (SI)''', '''Evolving OR Fluctuating''' (both terms refer to changes in either frequency, location or morphology). | *The TIRDA can be more specified with the '''prevalence''', '''duration''', '''frequency''', '''amplitude''', '''stimulus-induced (SI)''', '''Evolving OR Fluctuating''' (both terms refer to changes in either frequency, location or morphology). | ||
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Other intermittent rhythmic delta activity: | Other intermittent rhythmic delta activity: | ||
| − | [[FIRDA (frontal intermittent rhythmic delta activity)]] | + | *[[FIRDA (frontal intermittent rhythmic delta activity)]] |
| − | [[OIRDA (occipital intermittent rhythmic delta activity)]] | + | *[[OIRDA (occipital intermittent rhythmic delta activity)]] |
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Revision as of 15:02, 9 June 2017
- Temporal
- Intermittent: In cycles, so not continuous
- Rhythmic: Repetition of a waveform with relatively uniform morphology and duration, without an interval between consecutive waveforms.
- Delta: Delta waves
- Activity
- Short burst of rhythmic delta activity in the temporal region
- Amplitude of 50-100 microV
- The TIRDA can be more specified with the prevalence, duration, frequency, amplitude, stimulus-induced (SI), Evolving OR Fluctuating (both terms refer to changes in either frequency, location or morphology).
- If a more ictal appearance it can be categorized as TIRDA+:[1]
- +F: superimposed fast activity.
- +S: superimposed sharp waves or spikes, or sharply contoured.
- +FS: superimposed fast activity and sharp waves or spikes, or sharply contoured.
Clinical relevance
- Strong association with temporal lobe epilepsy
- Occurs in 28% of patients with temporal lobe epilepsy [2]
Other intermittent rhythmic delta activity:
- FIRDA (frontal intermittent rhythmic delta activity)
- OIRDA (occipital intermittent rhythmic delta activity)
TIRDA in a 72 year old female with left temporal epilepsy (average)
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Notes
