Dynamics of motor network overactivation after striatocapsular stroke: A longitudinal PET study using a fixed-performance paradigm

  • Calautti C
  • Leroy F
  • Guincestre J
 et al. 
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Abstract

BACKGROUND AND PURPOSE: Although excessive brain activation during affected hand motion after stroke is well documented, its time course has been rarely studied, and when studied, this has either been with passive movement or with active but cognitively complex task and uncontrolled performance over time, complicating interpretation. METHODS: According to a prospective and longitudinal design, we studied 5 right-handed patients with right-sided hemiparesis due to first-ever left striatocapsular infarction. Three-dimensional PET H(2)O(15) studies were performed twice ( approximately 7 and approximately 31 weeks after stroke [PET1 and PET2, respectively]) during right thumb-to-index tapping executed at the same rate in both studies (1.26 Hz, auditory cued). With SPM96 software, significant group and individual overactivations (P

Author-supplied keywords

  • Cerebral blood flow
  • Motor activity
  • Recovery of function
  • Subcortical infarction
  • Tomography, emission computed

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Authors

  • Cinzia Calautti

  • François Leroy

  • Jean Yves Guincestre

  • Jean Claude Baron

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