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Dissertation/Thesis Abstract

Handedness and verbal motor integration in adults with Down syndrome
by Mulvey, Genna, Ph.D., Arizona State University, 2007, 114; 3270607
Abstract (Summary)

In the typical population, speech processing and motor sequencing both take place in the left hemisphere of the brain. Research on right-handed (RH) adults with Down syndrome (DS) suggested that speech processing takes place in the right-hemisphere while motor sequencing is in the left-hemisphere resulting in deficits in verbal-motor integration. Because non-right-handedness (NRH) is more prevalent among people with DS than in people without DS, it is important to study NRH adults with DS to determine if they exhibited verbal-motor integration problems on movement rate, amplitude, and aspect ratio during bimanual drumming. In addition, coordination patterns were recorded to determine if adults with DS displayed the same lead by the preferred hand found in the typical population. Participants included 13 NRH adults with DS, 22 RH adults with DS, 16 NRH and 21 RH typical adults as a matched for chronological age (CA), and 15 NRH and 22 RH children matched for mental age (MA). Participants performed bimanual drumming with auditory, verbal and visual instructions with movements recorded by a 3D Ultratrak system. Coordination measures showed that adults with DS did not show the lead by the preferred hand found in CA and MA comparison groups. Although NRH and RH participants with DS performed differently with respect to method of instruction on the measurements of M of both aspect ratio and movement amplitude, verbal-motor integration problems were not consistent across measurements. However, across all measurements where method of instruction affected performance, both NRH and RH participants benefited the most from visual instruction. When teaching motor skills to people with DS, visual instruction will be most beneficial regardless of handedness.

Indexing (document details)
School: Arizona State University
School Location: United States -- Arizona
Source: DAI-B 68/06, Dissertation Abstracts International
Subjects: Developmental psychology, Cognitive therapy
Keywords: Down syndrome, Handedness, Verbal motor integration
Publication Number: 3270607
ISBN: 978-0-549-11132-0
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