Psychiatric correlates of repetitive rhythmic blinking on a routine EEG.

Our findings suggest that EEG tracings dominated by repetitive rhythmic blinking (RRB) may be indicative of a functional rather than an organic brain disorder. Evaluation of organicity in psychiatric patients is the most common reason for obtaining an EEG. As a normal EEG does not totally rule out organic involvement, such findings as the presence of RRB on the record may strengthen the value of EEG in such evaluations. More research is necessary to further delineate the relation between increased blinking and functional psychiatric disorders.