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Charras P.,University of Granada | Charras P.,French Institute of Health and Medical Research | Lupianez J.,University of Granada | Migliaccio R.,French Institute of Health and Medical Research | And 6 more authors.
Cortex | Year: 2012

Introduction: Signs of left unilateral neglect often occur after damage to the right hemisphere and entail a left-right imbalance in stimulus processing. Typically, neglect patients deviate rightward when bisecting lines. An underestimation of the left portion of the line and/or a right overestimation could explain this effect. Methods: Here we dissected their respective contribution by asking participants to compare a vertical segment to a horizontal segment, either on the left or on the right. We also tested whether neglect patients exhibited the symmetry law, whereby normal participants underestimate symmetrically bisected lines as compared to asymmetrically bisected lines. Results: Controls and patients underestimated symmetric figures. Depending on the degree of left-right horizontal competition, neglect patients underestimated left-sided stimuli or overestimated right-sided stimuli. Conclusions: We concluded that two independent deficits contribute to neglect signs: a deficit in attentional orienting to the left, which can be worsened by left hemianopia, perhaps depending on impaired functioning of right-hemisphere attentional networks, and a tendency for attention to be captured by right-sided stimuli, possibly resulting from the activity of an isolated left hemisphere. Finally, the symmetry law was preserved in neglect patients, and thus appears to be driven by pre-attentive mechanisms. © 2011 Elsevier Srl.

Bourlon C.,Service de Reeducation et de Readaptation Fonctionnelle | Bourlon C.,French Institute of Health and Medical Research | Bourlon C.,University Pierre and Marie Curie | Duret C.,Service de Reeducation et de Readaptation Fonctionnelle | And 8 more authors.
Cortex | Year: 2011

The relationships between spatial neglect for perceptual objects and representational for imagined items are difficult to explore because of several methodological problems, including the dearth of comparable tests for real and imagined scenes. We asked 19 patients with right brain damage and 12 healthy controls to say whether an auditorily presented French geographical location was left or right of Paris, and recorded their vocal response times. Afterwards, participants performed a similar test with visually presented items. Although several patients had asymmetries of performance on the perceptual version of the test, only one patient was more accurate for right-sided than for left-sided imagined stimuli, thus showing evidence for imaginal neglect. However, this patient performed normally on place description and on mental number line bisection, perhaps as a consequence of different strategies he employed for these tasks. Overall, our results confirm previous evidence showing that imaginal neglect is less frequent than, and often occurs in association with, perceptual neglect. Imaginal neglect may result from the contribution of deficits partly distinct from those implicated in perceptual neglect, such as impaired endogenous orienting of attention or deficits of spatial working memory. © 2010 Elsevier Srl.

Bourlon C.,Service de Reeducation et de Readaptation Fonctionnelle | Lehenaff L.,Service de Reeducation et de Readaptation Fonctionnelle | Batifoulier C.,Service de Reeducation et de Readaptation Fonctionnelle | Bordier A.,Service de Reeducation et de Readaptation Fonctionnelle | And 10 more authors.
Gait and Posture | Year: 2014

The control of dual-tasking effects is a daily challenge in stroke neurorehabilitation. It maybe one of the reasons why there is poor functional prognosis after a stroke in the right hemisphere, which plays a dominant role in posture control. The purpose of this study was to explore cognitive motor interference in right brain-lesioned and healthy subjects maintaining a standing position while performing three different tasks: a control task, a simple attentional task and a complex attentional task. We measured the sway area of the subjects on a force platform, including the center of pressure and its displacements. Results showed that stroke patients presented a reduced postural sway compared to healthy subjects, who were able to maintain their posture while performing a concomitant attentional task in the same dual-tasking conditions. Moreover, in both groups, the postural sway decreased with the increase in attentional load from cognitive tasks. We also noticed that the stability of stroke patients in dual-tasking conditions increased together with the weight-bearing rightward deviation, especially when the attentional load of the cognitive tasks and lower limb motor impairments were high. These results suggest that stroke patients and healthy subjects adopt a similar postural regulation pattern aimed at maintaining stability in dual-tasking conditions involving a static standing position and different attention-related cognitive tasks. Our results indicate that attention processes might facilitate static postural control. © 2013 Elsevier B.V.

Alagnide E.H.,Service de Reeducation et de Readaptation Fonctionnelle | Kpadonou T.G.,Service de Reeducation et de Readaptation Fonctionnelle | Kpadonou T.G.,University Abomey Calavi | Hans Moevi A.A.,University of Benin | And 4 more authors.
Journal de Readaptation Medicale | Year: 2015

Introduction. Monitoring and documentation of all cases of acute flaccid paralysis (AFP) are very important for the eradication of poliomyelitis. Objective. To analyze topographical and etiological aspects of AFP in Benin. Method. It is a retrospective and descriptive study. It included 1058 patients during 10 years, from 1st January 2001 to 31st December 2010. Results. The mean prevalence of AFP in children aged less than 15 years was 3 cases per 100,000 children. Patients were 2 months to 14 years old with a median of 38.72 months. Oral antipolio vaccine was given to only 78 % of the infants. Lower limbs weakness were the predominant seats of AFP (80 %). Many etiologies were identified such as iatrogenic sciatica nerve injury post-injection (31.28 %), poliovirus vaccine (15.38 %), sauvage poliovirus (7.44 %), cerebral malaria, encephalopathy, hip disease. AFP was more frequent in patient with 1 to 4 doses of polio vaccine specially on enteroviruse. Conclusion. AFP in Benin are due to many causes such as polio-virus vaccine and sciatica nerve injury, which appear to be more concerned. The presence of these two etiologies of iatrogenic cases must induce thoughts on the mechanisms of prevention of these cases of AFP. © 2015 Elsevier Masson SAS.

Kpadonou G.T.,Service de Reeducation et de Readaptation Fonctionnelle | Awede B.,University of Monastir | Alagnide E.,Service de Reeducation et de Readaptation Fonctionnelle | Niama Natta D.,Service de Reeducation et de Readaptation Fonctionnelle | And 2 more authors.
Journal de Readaptation Medicale | Year: 2012

Effects of dance on skeletal muscles are variable. Objective: To determine the impact of the practice of three similar beninese traditional dances (Zinli, and Tchinkounmè Akonhoun) on the lumbopelvic musculature. Method: This is a prospective, cross-sectional case-control descriptive and analytical study. Matching of controls was done by age, sex, Body Mass Index and marital status of the dancers. Results: Subjects were aged 26.16 ± 6.82 years. They had a body mass index of 23.56 ± 4.96 kg/m2. Monthly frequency of practice of the dances was 10.16 ± 5.80 and seniority in the practice of 11.30 ± 8.45 years. Iliopsoas muscles of the practitioners of these traditional dances had a greater hypoextensibility (P = 8.10-5) while the right thigh, the hamstring and the tensor of fascia-lata had a normal stretch. They presented a weakness in the muscles of the right thigh, hamstring, medius and large gluteus and tensor of fascia-lata and developed better strength on abdominal (P = 0.0001) and paraspinal muscles (P = 0.0043). Otherwise, endurance increased on the paravertebral (P = 9. 10-5). Conclusion: Beninese traditional dances (Zinli, Tchinkounmè and Akonhoun) induced variables modifications, either beneficial or deleterious on lumbo-pelvic musculature. © 2012 Published by Elsevier Masson SAS.

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