Which EEG pattern is associated with West's Syndrome?

West's Syndrome, also known as infantile spasms, is characterized by a specific EEG pattern known as hypsarrythmia. This is a disorganized, chaotic pattern of high-voltage slow waves and sharp waves that typically appears during the interictal period of this condition. Hypsarrythmia is crucial for identifying West's Syndrome as it reflects the underlying disturbance in brain activity associated with the syndrome.

Recognizing hypsarrythmia is essential in diagnosing this condition, as it forms part of the clinical criteria for West's Syndrome. In contrast, other EEG patterns such as beta, alpha, and theta waves do not specifically correlate with West's Syndrome and are seen in other contexts or types of brain activity. Beta waves are associated with active thinking and alertness; alpha waves are present during relaxed, awake states; and theta waves are often linked to drowsiness or light sleep, none of which are characteristic of West's Syndrome.