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13 month old boy, who presented with a history of the following spells. Over 5 minutes, there were clusters of sudden forward flexion of the head and neck; along with flaring of arms outward, and then inward. The eyes would roll up briefly with each spell. The intensity of the spasms increased as the time progressed, and then decreased. The child remained quiet with glassy eyes during and between the spasms. There was no frothing at the mouth, tonic-clonic movement, tongue biting, cyanosis, or relation to feeding. These clusters occurred about three times per day, usually shortly after awakening. The mother thought he was having abdominal cramps. Changing formula had no effect.
The patient was fraternal twin B weighing 3.5 kg when born at 38 weeks via C-section. He had never been hospitalized before. Vaccinations were up to date. There was no family history of epilepsy.
General physical examination including growth parameters was normal. On neurological examination, the child was developmentally delayed. He babbled without words, and could not stand without wobbling. Cranial nerve and fundoscopic examinations were normal. Muscle tone was appropriate and movements were symmetric. Reflexes were 2+. Examination of the skin, including with a Wood’s lamp, was normal. Routine admission labs were normal.
EEG will likely show?
What is hypsarrhythmia