What EEG pattern is characterized by multifocal spikes?

The pattern characterized by multifocal spikes is GPD or GPEDS (Generalized Polyspike and Wave Discharges). This pattern is often observed in certain types of epilepsy, particularly in generalized epilepsy syndromes. Multifocal spikes indicate synchronous discharges from multiple cortical areas, which can suggest the presence of irritative or epileptic activity in more than one region of the brain.

In clinical practice, recognizing GPD or GPEDS is crucial because these patterns can help differentiate between various types of seizure disorders and guide appropriate management. For instance, they are commonly associated with conditions like juvenile myoclonic epilepsy and can indicate a more diffuse or widespread underlying pathology than other patterns.

Other patterns such as FIRDA (Frontal Intermittent Rhythmic Delta Activity), LPDs (Lateralized Periodic Discharges), and Alpha coma involve different characteristics and clinical implications, typically not presenting with the multifocal aspect that is specifically noted in GPD or GPEDS. Understanding these distinctions is key for EEG technologists when interpreting findings and contributing to diagnoses.