title: Different constraints on grip selection in brain-damaged patients: object use versus object transport.
abstract: The present study discusses the presence of different constraints on action selection during object use versus object transport. Sixteen left brain-damaged (LBD) patients, 10 right brain-damaged (RBD) and 35 healthy controls were examined on a grip preference test consisting of a grasping-to-transport and a grasping-to-use condition. Assessment included a general praxis testing (pantomime production, object utilization gesture recognition and object use). We also reported the case of a close-head injury patient (DR) with an atypical behavioural pattern. Our results supported the different constraint hypothesis. While several LBD and RBD patients performed inappropriate grips in the grasping-to-transport condition, only two patients (L2 and DR) used inappropriate grips in the grasping-to-use condition. No correlation was found between the two conditions of the grip preference test and measures of the general praxis testing. The discussion focuses on the nature of constraints on grip selection during object use and object transport.
authors.affiliation: Laboratory of Psychology UPRES EA 2646, University of Angers, France.
authors.forename: François
authors.initials: F
authors.lastname: Osiurak
authors.forename: Ghislaine
authors.initials: G
authors.lastname: Aubin
authors.forename: Philippe
authors.initials: P
authors.lastname: Allain
authors.forename: Christophe
authors.initials: C
authors.lastname: Jarry
authors.forename: Frédérique
authors.initials: F
authors.lastname: Etcharry-Bouyx
authors.forename: Isabelle
authors.initials: I
authors.lastname: Richard
authors.forename: Didier
authors.initials: D
authors.lastname: Le Gall
mesh_terms: D000368:Aged; D001072:Apraxias / Q000503:physiopathology; D001930:Brain Injuries / Q000503:physiopathology*; D004292:Dominance, Cerebral / Q000502:physiology; D005260:Female; D005385:Fingers / Q000503:physiopathology; D007839:Functional Laterality / Q000502:physiology; D005868:Gestures; D006225:Hand / Q000503:physiopathology*; D018737:Hand Strength / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology*; D012016:Reference Values