Correlation of cerebral hemodynamic changes during mental activity and recovery after stroke

M. Bragoni, C. Caltagirone, E. Troisi, M. Matteis, F. Vernieri, Mauro Silvestrini

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Objective: To investigate the correlation between changes in cerebral functional activity during mental engagement and the potential for neurologic recovery after stroke. Background: Transcranial Doppler ultrasonography (TCD) makes it possible to detect the dynamic adjustment of cerebral perfusion related to functional neuronal changes. Methods: TCD monitoring of flow velocity changes in the middle cerebral artery of 29 ischemic stroke patients was performed during an object recognition task. The study took place within 4 weeks from stroke onset. Based on recovery occurring after 2 months, the patients were divided into four groups depending on the side of hemispheric lesion and the presence or absence of neurologic recovery. Ten healthy subjects served as control subjects. Results: During the recognition task, control subjects showed a bilateral increase in flow velocity with respect to the rest phase (right side, 7.02 ± 1.3%; left side, 6.65 ± 1.1%), with no side-to-side difference. In patients who experienced recovery, a similar pattern of bilateral activation was observed, irrespective of the side of the lesion. Conversely, in patients with no recovery, the increase of flow velocity was significantly higher on the side contralateral to the brain lesion (p <0.0001) with respect to the lesion side. Performance during the recognition task was comparable in the four groups of patients. Conclusions: These findings suggest that satisfactory recovery from a neurologic deficit requires the persistence of functional activity in the damaged hemisphere despite the presence of an anatomic lesion. The possibility of obtaining early prognostic indications with TCD may be relevant for an early selection of patients with the best probability of benefiting from rehabilitation therapy.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalNeurology
Volume55
Issue number1
Publication statusPublished - Jul 12 2000

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Doppler Transcranial Ultrasonography
Hemodynamics
Stroke
Nervous System
Middle Cerebral Artery
Neurologic Manifestations
Patient Selection
Healthy Volunteers
Rehabilitation
Perfusion
Brain
Therapeutics

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Bragoni, M., Caltagirone, C., Troisi, E., Matteis, M., Vernieri, F., & Silvestrini, M. (2000). Correlation of cerebral hemodynamic changes during mental activity and recovery after stroke. Neurology, 55(1), 35-40.

Correlation of cerebral hemodynamic changes during mental activity and recovery after stroke. / Bragoni, M.; Caltagirone, C.; Troisi, E.; Matteis, M.; Vernieri, F.; Silvestrini, Mauro.

In: Neurology, Vol. 55, No. 1, 12.07.2000, p. 35-40.

Research output: Contribution to journalArticle

Bragoni, M, Caltagirone, C, Troisi, E, Matteis, M, Vernieri, F & Silvestrini, M 2000, 'Correlation of cerebral hemodynamic changes during mental activity and recovery after stroke', Neurology, vol. 55, no. 1, pp. 35-40.
Bragoni M, Caltagirone C, Troisi E, Matteis M, Vernieri F, Silvestrini M. Correlation of cerebral hemodynamic changes during mental activity and recovery after stroke. Neurology. 2000 Jul 12;55(1):35-40.
Bragoni, M. ; Caltagirone, C. ; Troisi, E. ; Matteis, M. ; Vernieri, F. ; Silvestrini, Mauro. / Correlation of cerebral hemodynamic changes during mental activity and recovery after stroke. In: Neurology. 2000 ; Vol. 55, No. 1. pp. 35-40.
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