Deterioration of Hemiparesis after Recurrent Stroke in the Unaffected Hemisphere: Three Further Cases with Possible Interpretation

@article{Yamamoto2006DeteriorationOH,
  title={Deterioration of Hemiparesis after Recurrent Stroke in the Unaffected Hemisphere: Three Further Cases with Possible Interpretation},
  author={Shiro Yamamoto and Masashi Takasawa and Koji Kajiyama and J. C. Baron and Takenori Yamaguchi},
  journal={Cerebrovascular Diseases},
  year={2006},
  volume={23},
  pages={35 - 39}
}
Background: The concept of neural reorganization after brain damage is already well established, and many previous studies have successfully reported the translocation of the neural activation in the motor-related cortices during motor tasks using functional imaging modalities. Several primate and human studies have suggested the formation of newly reorganized tracts in the ipsilesional or contralesional hemisphere, but the mechanism for the formation of these tracts is still largely unknown… Expand
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References

SHOWING 1-10 OF 31 REFERENCES
Evolution of cortical activation during recovery from corticospinal tract infarction.
TLDR
The evolution of activation in the SMC from early contralesional activity to late ipsilesional activity suggests that a dynamic bihemispheric reorganization of motor networks occurs during recovery from hemiparesis. Expand
Pilot study of functional MRI to assess cerebral activation of motor function after poststroke hemiparesis.
TLDR
The explanation offered for the findings is that preexisting uncrossed motor neural pathways may be accessed or recruited to compensate for damage to the crossed motor pathways after ischemic stroke. Expand
Functional Neuroimaging Studies of Motor Recovery After Stroke in Adults: A Review
TLDR
Both cross-sectional and longitudinal studies have demonstrated that the damaged adult brain is able to reorganize to compensate for motor deficits, and the main mechanism underlying recovery of motor abilities involves enhanced activity in preexisting networks. Expand
Deterioration of pre-existing hemiparesis brought about by subsequent ipsilateral lacunar infarction
TLDR
Functional magnetic resonance imaging showed that the paretic left hand grip activated the ipsilateral left motor areas, but not the right hemispheric motor Areas, which suggests that partial recovery of the left hemiparesis had been brought about by cortical reorganisation of theleft hemisphere and intensification of the uncrossed corticospinal tract. Expand
Functional Neuroimaging Studies of Motor Recovery After Stroke in Adults
TLDR
Both cross-sectional and longitudinal studies have demonstrated that the damaged adult brain is able to reorganize to compensate for motor deficits, suggesting that the main mechanism underlying recovery of motor deficit after stroke is a complete substitution of function. Expand
Ipsilateral hemiparesis caused by a corona radiata infarct after a previous stroke on the opposite side.
TLDR
Functional magnetic resonance imaging demonstrated bilateral motor area activation during paretic left hand movement that suggests that the ipsilateral hemiparesis was caused by a new stroke in the ipilateral motor system that was functionally reorganized after the previous stroke. Expand
Motor recovery following capsular stroke. Role of descending pathways from multiple motor areas.
TLDR
The functional anatomy of motor recovery was studied by assessing motor function quantitatively in 23 patients following capsular or striatocapsular stroke, finding clinically similar motor deficits with a similar course of functional restitution following disruption of these different descending motor pathways indicate a parallel operation of cortical motor areas. Expand
Displacement of primary sensorimotor cortex activation after subcortical stroke: a longitudinal PET study with clinical correlation
TLDR
Five patients with left striatocapsular infarction were studied twice with PET during auditory-cued right thumb-index tapping, and there was no significant change in the coordinates, and no significant correlation between coordinate changes from PET1 to PET2 and concomitant motor recovery. Expand
MR tractography for the evaluation of functional recovery from lenticulostriate infarcts
TLDR
The corticospinal tracts (CSTs) crossed the lenticulostriate artery territory exclusively at the posterosuperior quadrant, and the degree of CST involvement within the infarcts was directly related to stroke severity and functional recovery. Expand
The role of ipsilateral premotor cortex in hand movement after stroke
TLDR
Slowing of reaction time after premotor cortex TMS in the patients correlated inversely with the relative hemispheric lateralization of functional magnetic resonance imaging activation in PMd, suggesting that the increased activation in ipsilateral cortical motor areas during movements of a paretic hand represents a functionally relevant, adaptive response to the associated brain injury. Expand
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3
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