Regional cerebral blood flow comparison of right and left hand movement

Halsey, James H.; Blauenstein, Urs W.; Ea, Wilson; Wills, Edward H.

doi:10.1212/wnl.29.1.21

Cited by 75 publications

(16 citation statements)

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“…8 3 8 7 ) , although Fisher's protected least-significant-difference test suggested an rCBF increase in the parietal region (Detector 27) in the noninjured hemisphere (p <0.05). 8 and, more recently, with positron emission tomography. 21 The rCBF increases in the rolandic area in our study were similar to those reported by Halsey et al 8 but lower than those reported by Olesen 5 and Orgogozo et al 7 However, it must be stressed that the functional task assigned to the patients in one of these studies 5 was more intense than our test and was accompanied by verbal stimulations, and it is well established that rCBF increases markedly during a linguistic task.…”

Section: Resultsmentioning

confidence: 99%

Evidence of cortical reorganization in hemiparetic patients.

Brion

Demeurisse

Capon

1989

Stroke

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We studied the mechanisms underlying the recovery of motor function of the hand using a bidimensionai xenon-133 inhalation technique to measure regional cerebral blood flow at rest and during the performance of a motor task (test condition). The regional cerebral blood flow patterns under rest and test conditions were compared in normal control and in stroke patients with either a cortico-subcortical or a deep-seated lesion. Functional recovery appears to depend upon cortical reorganization involving both hemispheres, particularly in both parietal regions in the subgroup of patients with cortico-subcortical lesions. (Stroke 1989;20:1079-1084

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Section: Resultsmentioning

confidence: 99%

Evidence of cortical reorganization in hemiparetic patients.

Brion

Demeurisse

Capon

1989

Stroke

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“…Of interest, cortical activation seems to be present to a larger degree with the use of an 'untrained' than with the involvement of a ' trained ' muscle group, i.e. with use of the left as opposed to the right hand (Halsey et al 1979).…”

Section: Discussionmentioning

confidence: 97%

Effect of training on central factors in fatigue following two‐ and one‐leg static exercise in man

Rube¹,

Secher

1991

Acta Physiologica Scandinavica

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Leg strength and fatigue developed during 150 repeated two- and one-leg isometric maximal voluntary contractions were determined before and after a 5-week one- (n = 6) or two- (n = 7) leg training programme including a control group of five subjects. Two- and one-leg training increased two- and one-leg strength by 59 (range 8-107) and 36% (-1-69) respectively (P less than 0.01) with no significant difference between the two groups. Two-leg training decreased (P less than 0.05) fatigue only during two-leg maximal voluntary contractions (from 20 [11-26] to 13% [6-27]); and one-leg training fatigue only during one-leg maximal voluntary contractions (from 20 [15-23] to 11% [9-24]) despite the fact that both legs were trained. Surface electromyographic activity decreased during both repeated two- and one-leg maximal voluntary contractions (P less than 0.01) but a reduction in electromyographic decay was seen (P less than 0.05) during two-leg maximal voluntary contractions after two-leg training. Training increased fast-twitch b fibre size (P less than 0.01), and glycogen depletion was seen in fast-twitch (a and b) fibres, but the relative fast-twitch b area did not increase significantly. No training effects were seen in the control group. The results show that an approximately 47% increase in muscle strength may take place without a significant change in the relative percentage of muscle fibre types or in the average muscle fibre size. Furthermore, the specificity of the training response to fatigue developed during repeated two- and one-leg maximal voluntary contractions suggests a change in the nervous influence on the motor units.

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“…Second, the right hand and the left hand are different in their own right, independent of handedness (and of cerebral dominance), with environmental influences leading to differential experience. This is thought to be because of the result of the predominance of right‐handed people, with environmental influences on brain development providing the two hands with different experience, and hence different patterns of brain activation (Halsey et al ., 1979).…”

Section: Introductionmentioning

confidence: 99%

Lateralization of motor circuits and handedness during finger movements

Solodkin

Hluštı́k

Noll

et al. 2001

Euro J of Neurology

191

141

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Although functional lateralization in the human brain has been studied intensively, there remains significant controversy over the brain mechanisms that instantiate it. The main objective of the present study is to characterize the regions associated with the generation of different movements by the fingers of both hands by right- and left-handed people. Thirteen right- and left-handers were studied using blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI) during performance of single and sequential finger movement tasks. We used single-shot whole-brain spiral fMRI to map the functional components of the motor system during these tasks. Regions of interest included the primary motor and sensory cortices, the pre-motor cortices and the cerebellum. Sequential movements were associated with intense brain activation in several bilateral regions, whereas single movements were associated with less activation in fewer regions, but with greater laterality. Right- and left-handers differed in their pattern of activation, sharing a pattern of activation on simple movements but responding differently to sequential movements. On simple movements, the brain activation patterns of left- and right-handers were similar in volume, number of areas and laterality. By contrast, on sequential movement, left-handers activated larger volumes and a larger number of brain areas than right-handers, and showed significantly less brain lateralization. These results highlight differences in the functional organization of motor areas in right- and left-handed people. The discrepancies that might reflect differences in the network features of motor systems in these two groups, could also determine differences in motor activity that occur during recovery from injury (e.g. after stroke).

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Regional cerebral blood flow comparison of right and left hand movement

Cited by 75 publications

References 0 publications

Evidence of cortical reorganization in hemiparetic patients.

Evidence of cortical reorganization in hemiparetic patients.

Effect of training on central factors in fatigue following two‐ and one‐leg static exercise in man

Lateralization of motor circuits and handedness during finger movements

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