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Abstract

This study examines whether head-injured people have a central executive deficit, and if this is correlated with performance on frontal-lobe tests. Twenty-five severely head-injured (HI) patients and 25 matched controls performed five tasks:(1) visual-motor tracking, (2) digit span, (3) visual-motor tracking with verbal encouragement from the experimenter, (4) visual-motor tracking whilst holding a conversation with the experimenter, and (5) visual-motor tracking with a simultaneous digit-span task. In addition, all subjects were assessed on three frontal-lobe tests. HI patients were significantly worse overall than controls. The most striking difference was in tracking with conversation, in which HI patients (but not controls) showed a marked decrement in performance. Scores from tests of frontal lobe functioning were significantly correlated with (1) tracking during conversation and (2) tracking with digits. The results are broadly consistent with a central executive deficit in head-injured patients.

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References

Levin HS , Grossman RG , Rose JE , Teasdale G. Long term neuropsychological outcome of closed head injury. Neurosurg 1979; 50: 412-22.

Stuss DT , Ely P. , Hugenholtz H. et al. Subtle neurological deficits in patients with good recovery after closed head injury. Neurosurg 1985; 17: 41-47.

Baddeley AD , Hitch G. Working memory. In: Bower G ed. The psychology of learning and motivation: advances in research and theory . New York: Academic Press, 1974: 47-90.

Baddeley AD Working memory. Oxford: Oxford University Press, 1986.

Adams JH , Scott G. , Parker LS , Graham DI , Doyle D. The contusion index: a quantitative approach to cerebral contusions in head injury. Neuropathol Appl Neurobiol 1980; 6: 319-24.

Baddeley AD , Logie R. , Bressi S. , Della Sala S, Spinnler H. Dementia and working memory. Q J Exp Psychol 1986; 38A: 603-18.

Stuss DT , Stethem LL , Hugenholtz H. , Picton T. , Pivik J. , Richard MT Reaction time after head injury: fatigue, divided and focused attention and consistency of performance. J Neurol Neurosurg Pyschiatry 1989; 51: 742-48.

Jennett B. Assessment of the severity of head injury. J Neurol Neurosurg Psychiatry 1976; 39: 647-55.

Benton AL , Hamsher K de S. Multilingual aphasia examination. Iowa City: University of Iowa, 1976.

10.

Reitan RM Validity of the trailmaking test as an indication of organic brain damage . Percept Mot Skills 1958; 8: 271-76.

11.

Nelson HE A modified card sorting test sensitive to frontal lobe defects. Cortex 1976; 12: 313-24.

12.

Milner B. Effects of different brain lesions on card sorting. Arch Neurol 1963; 9: 90-100.

13.

Ryan BF , Joiner BL , Ryan TA Minitab handbook, second edition 1985. Boston: Duxbury Press.

14.

SAS user's guide: statistics version 5 edition. Cary NC: SAS Institute Incorporated, 1985.

Is there a central executive deficit after severe head injury?

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