Une analyse tridimensionnelle de la saisie et du pointage latéraux dans la négligence spatiale [A tridimensional study of lateral grasping and pointing in spatial neglect]

Details

Serval ID
serval:BIB_948BB5FC3C93
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Une analyse tridimensionnelle de la saisie et du pointage latéraux dans la négligence spatiale [A tridimensional study of lateral grasping and pointing in spatial neglect]
Journal
Revue neurologique
Author(s)
Bénaïm C., Blatt J.L., Rousseaux M.
ISSN
0035-3787 (Print)
ISSN-L
0035-3787
Publication state
Published
Issued date
07/2000
Peer-reviewed
Oui
Volume
156
Number
6-7
Pages
622-633
Language
french
Notes
Publication types: English Abstract ; Journal Article
Publication Status: ppublish
Abstract
The aim of this study was to analyze the ipsilateral upper limb and head kinematics in patients presenting with spatial neglect, using pointing and grasping to object. Four patients were included and compared to an equivalent number of normal subjects. Head, shoulder, and wrist movements were recorded using a three-dimensional VICON system. Objects to be pointed or grasped were localized in the right or left space facing the subject. Patients presented with a reduction in the mean wrist velocity, which was more obvious when directed to the left side, reduction in the peak velocity, and a severe increase of the time between the peak velocity and the end of the movement. The amplitude and mean velocity of left head movements were comparable in both groups. The analysis of the intersegmental co-ordination showed that the sequence of activation of corporeal segments was similar in patients and controls: head movement, shoulders rotation, upper limb extension. Co-ordination between head and wrist movements was assessed using the cross-correlation method. An increase in time lag and a reduction in crossed correlations between the head and wrist movements was observed in leftward movements of neglect patients, but the co-ordination between the shoulder and wrist movements was preserved. Thus, we demonstrated a global disorder of intentional movements in patients, which was relatively similar in pointing and grasping to object, and predominated on the approach phase, which is associated to important visuo-motor adjustments. This study also demonstrated desynchronization of head and wrist movements, which can be an important problem in neglect patients.
Keywords
Adult, Agnosia/complications, Agnosia/physiopathology, Arm/physiopathology, Attention/physiology, Brain/pathology, Female, Functional Laterality/physiology, Head Movements/physiology, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Psychomotor Disorders/etiology, Psychomotor Disorders/physiopathology, Psychomotor Performance, Wrist/physiopathology
Pubmed
Web of science
Create date
04/05/2020 13:11
Last modification date
05/05/2020 6:26
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