Impersistent execution of saccadic eye movements after traumatic brain injury.
A dynamic scoring system was developed to quantitatively resolve the ability of a subject to persistently execute a repeated motor act. Saccadic eye movements in response to pseudo-random and periodic stimuli were examined in patients with traumatic brain injury (TBI) and in normal subjects. Results indicated significantly lower dynamic persistence scores for the former group (50.5 +/- 32.2% vs 94.1 +/- 4.4%). Analysis of the patients' data revealed a stronger association of low scores with right hemisphere damage than with left hemisphere damage (39.4 +/- 28.9% vs 76.6 +/- 15.6%). Results are interpreted in terms of high-level attention impairments, not in terms of specific deficits in eye movement ability.
Glass
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Loewenstein Rehabilitation Hospital, Ra'anana, Israel.
Groswasser
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Groswasser-Reider
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D000293:Adolescent; D000328:Adult; D001921:Brain / Q000503:physiopathology; D001925:Brain Damage, Chronic / Q000503:physiopathology* / Q000534:rehabilitation; D001930:Brain Injuries / Q000503:physiopathology* / Q000534:rehabilitation; D004292:Dominance, Cerebral / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D016489:Head Injuries, Closed / Q000503:physiopathology / Q000534:rehabilitation; D006801:Humans; D008297:Male; D012016:Reference Values; D012438:Saccades / Q000502:physiology*; D014950:Wounds, Penetrating / Q000503:physiopathology