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seen in geriatric patients, blinking induced by tapping over the glabella. With repeated tapping the reflex is normally suppressed, but it may remain active in frontal lobe lesions and parkinsonism.
Blinking of the eyes when the forehead just above the bridge of the nose is tapped. In most people, blinking stops after a few taps on the forehead. If it does not, significant brain disease may be present, e.g., Parkinson disease or any disease that causes frontal lobe atrophy.
See also: reflex