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Central mid-temporal spikes triggered by blinking

M A Nadkarni¹, V Postolache, A Gold

¹Comprehensive Epilepsy Center, New York Hospital-Cornell Medical Center, NY 10021.

Electroencephalography and Clinical Neurophysiology

|January 1, 1994

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Blinking can trigger central mid-temporal spikes (CMTS) in children, occurring spontaneously or reflexly. This study shows how an endogenous behavior like blinking activates these EEG patterns.

Area of Science:

Pediatric Neurology
Clinical Neurophysiology

Background:

Central mid-temporal spikes (CMTS) are a type of EEG abnormality often seen in children.
Understanding triggers for these spikes is crucial for accurate diagnosis and management.

Observation:

A 6-year-old boy undergoing closed-circuit TV-electroencephalogram (CCTV-EEG) monitoring exhibited central mid-temporal spikes.
These spikes were observed to be triggered by the act of blinking.

Findings:

The triggered spikes occurred consistently 100-200 milliseconds after blinking, both spontaneously and reflexly.
Spike occurrence was independent of light conditions (light/dark) and state of consciousness (awake/drowsy).
Spontaneous spikes, not linked to blinking, were also noted during drowsiness.

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Implications:

Blinking represents an endogenous behavioral trigger for CMTS activation.
This finding may refine diagnostic criteria and understanding of paroxysmal EEG phenomena.
Further research could explore similar triggers in other EEG abnormalities.