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We report data from two left hemisphere stroke patients with moderate-to-severe ideomotor apraxia who exhibited deficits in positioning their hands to use 'conflict' objects (objects grasped and used with different hand postures) relative to controls and patients with mild apraxia. These novel data support the claim that actions to common objects are subject to interference between multiple responses, and suggest that errors in apraxia may be attributed to deficient resolution of competition between appropriate and inappropriate actions.
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http://dx.doi.org/10.1111/j.1748-6653.2012.02031.x | DOI Listing |
J Neurol Surg Rep
July 2025
Department of Neurosurgery, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan.
We report a patient with an arachnoid cyst in the velum interpositum (VI) and discuss the mechanism of the symptoms based on functional neuroanatomy. A 68-year-old woman presented with difficulty in doing housekeeping and with route-finding disorientation in known locations. Her performance intelligence quotient (PIQ) score was 68, significantly lower than her verbal intelligence quotient (IQ) of 103.
View Article and Find Full Text PDFMov Disord Clin Pract
August 2025
Department of Neurology, University Medical Center Schleswig-Holstein, Campus Kiel and Christian-Albrechts-University of Kiel, Kiel, Germany.
Handb Clin Neurol
March 2025
Department of Psychology, University of Campania 'Luigi Vanvitelli', Caserta, Italy. Electronic address:
This chapter deals with the unique human abilities of using tools, imitating others' gestures, drawing, and building complex items. Herein, after a brief overview of clinical manifestations and assessment of disorders of tool use and imitation (upper limb apraxia) and of the impairments in drawing and assembling multipart objects (constructional apraxia), brain asymmetries are discussed mainly starting from the neuropsychologic studies on patients with focal brain lesions, although both upper limb apraxia and constructional apraxia are often observed during the course of neurodegenerative diseases. Although no room is allowed here for a full discussion of brain-behavior relationships, relevant functional neuroimaging findings in healthy individuals are considered.
View Article and Find Full Text PDFCortex
January 2025
NPSY.Lab-VR, Department of Human Sciences, University of Verona, Italy; IRCSS Sacro Cuore Don Calabria, Negrar, Verona, Italy.
Neurology
November 2024
From the Departments of Neurology (R.S.E., F.J.J., D.J.X., J.R.B., S.P.), and Pathology and Laboratory Medicine (E.L.-L.P.), University of Pennsylvania, Philadelphia.