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The right hemisphere is important for driving-related cognitive function after stroke.

Koji Shimonaga1,2, Seiji Hama3,4, Toshio Tsuji5

  • 1Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.

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Keywords:
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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Cognitive Psychology

Background:

  • Driving is vital for community reintegration and quality of life (QOL) post-stroke.
  • Cognitive deficits, particularly attention, significantly impact driving ability.
  • Identifying brain lesions linked to attention deficits is crucial for assessing driving fitness.

Purpose of the Study:

  • To investigate the relationship between brain lesion location and attention deficits affecting driving ability in stroke survivors.
  • To determine the specific brain structures critical for directed and sustained attention relevant to driving.
  • To inform clinical assessments of driving fitness after stroke.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to identify lesion locations in 57 stroke patients.
  • Patients underwent comprehensive attention assessments, including the Clinical Assessment for Attention (CAT), Continuous Performance Test (CPT), Behavioral Inattention Test (BIT), and a driving simulator.
  • Statistical non-parametric mapping (SnPM) analyzed the association between lesion location and cognitive performance.

Main Results:

  • Lesion locations associated with attention deficits were identified in both hemispheres, with a notable emphasis on the right hemisphere.
  • Right hemisphere damage correlated with deficits in directed attention (neglect).
  • Damage in both hemispheres was linked to impairments in sustained attention (false recognition).

Conclusions:

  • The right hemisphere plays a critical role in maintaining directed and sustained attention necessary for driving.
  • Both hemispheres are important for cognitive functions supporting driving ability.
  • Understanding these brain-lesion-cognition links can improve QOL for stroke survivors by guiding driving assessments.