title: Brain lateralization of complex movement: neuropsychological evidence from unilateral stroke.
abstract: Complex movement (CM) refers to the representation of a goal-oriented action and is classified as either transitive (use of tools) or intransitive (communication gestures). Both types of CM have three specific components: temporal, spatial, and content, which are subdivided into specific error types (SET). Since there is debate regarding the contribution of each brain hemisphere for the types of CM, our objective was to describe the brain lateralization of components and SET of transitive and intransitive CM. We studied 14 patients with a left hemisphere stroke (LH), 12 patients with a right hemisphere stroke (RH), and 16 control subjects. The Florida Apraxia Screening Test-Revised (FAST-R, Rothi et al., 1988) was used for the assessment of CM. Both clinical groups showed a worse performance than the control group on the total FAST-R and transitive movement scores (p<0.001). Failures in Spatial and Temporal components were found in both clinical groups, but only LH patients showed significantly more Content errors (p<0.01) than the control group. Also, only the LH group showed a higher number of errors for intransitive movements score (p=0.017), due to lower scores in the content component, compared to the control group (p=0.04). Transitive and intransitive CMs differ in their neurocognitive representation; transitive CM shows a bilateral distribution of its components when compared to intransitive CM, which shows a preferential left hemisphere representation. This could result from higher neurocognitive demands for movements that require use of tools, compared with more automatic communication gestures.
authors.affiliation: Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Departamento de Neuropsicología, Av. Insurgentes Sur 3877, Col. La Fama, Mexico DF 14269, Mexico.
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Flores-Medina
authors.affiliation: Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Departamento de Neuropsicología, Av. Insurgentes Sur 3877, Col. La Fama, Mexico DF 14269, Mexico.
authors.forename: Mireya
authors.initials: M
authors.lastname: Chávez-Oliveros
authors.affiliation: San Diego State University/University of California, San Diego Joint Doctoral Program in Clinical Psychology, 6363 Alvarado Court, Suite 103, San Diego, CA 92120, United States.
authors.forename: Luis D
authors.initials: LD
authors.lastname: Medina
authors.affiliation: Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Departamento de Neuropsicología, Av. Insurgentes Sur 3877, Col. La Fama, Mexico DF 14269, Mexico. Electronic address: yaneth_r@hotmail.com.
authors.forename: Yaneth
authors.initials: Y
authors.lastname: Rodríguez-Agudelo
authors.affiliation: Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Departamento de Neuropsicología, Av. Insurgentes Sur 3877, Col. La Fama, Mexico DF 14269, Mexico.
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Solís-Vivanco
mesh_terms: D000328:Adult; D001921:Brain / Q000473:pathology; D002545:Brain Ischemia / Q000473:pathology / Q000523:psychology; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement; D009483:Neuropsychological Tests; D020521:Stroke / Q000473:pathology / Q000523:psychology
keywords: Brain lateralization; CM; Complex movement; IM; Intransitive movement; LH; RH; SEM; SET; Stroke; TM; Transitive movement; complex movemen; intransitive movements; patients with unilateral ischemic stroke on the left hemisphere; patients with unilateral ischemic stroke on the right hemisphere; specific error types; standard error of the mean; transitive movements