TIRDA
Pronunciation: TEER-dah
Also written as: TIRDA — Temporal Intermittent Rhythmic Delta Activity
Temporal intermittent rhythmic delta activity suggesting temporal lobe dysfunction or seizure susceptibility.
Full Definition
TIRDA (Temporal Intermittent Rhythmic Delta Activity) consists of rhythmic delta waves occurring intermittently over the temporal regions, often unilaterally. This pattern is considered a marker of temporal lobe dysfunction and may indicate increased seizure susceptibility, particularly in patients with temporal lobe epilepsy. TIRDA can occur independently or in association with temporal sharp waves or spikes. Unlike FIRDA, which suggests metabolic or increased pressure effects, TIRDA typically indicates focal temporal pathology such as hippocampal sclerosis, temporal lobe tumors, or other structural abnormalities affecting the temporal lobe.
Usage
Usage note: Specifically temporal location distinguishes from FIRDA and suggests focal rather than generalized pathology.
In Context
- "Left TIRDA was noted between seizures in this patient with mesial temporal sclerosis." — Video-EEG monitoring report
- "The presence of TIRDA supported the clinical suspicion of temporal lobe epilepsy." — Epilepsy evaluation summary