Theses and dissertations

This collection includes both ASU Theses and Dissertations, submitted by graduate students, and the Barrett, Honors College theses submitted by undergraduate students. 

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Cycle Therapy Improves Body Composition in Adolescents with Down Syndrome

Description
The aim was to examine the effectiveness of a cycling intervention on body composition in adolescents with Down syndrome (DS). Four participants completed three interventions over eight consecutive weeks. The interventions were: 1) Voluntary Cycling (VC), in which participants cycled at their self-selected pedaling rate 2) Assisted Cycling (AC), in…

The aim was to examine the effectiveness of a cycling intervention on body composition in adolescents with Down syndrome (DS). Four participants completed three interventions over eight consecutive weeks. The interventions were: 1) Voluntary Cycling (VC), in which participants cycled at their self-selected pedaling rate 2) Assisted Cycling (AC), in which the participants' voluntary pedaling rates were augmented with a motor to ensure the maintenance of 80 rpms. 3) No cycling (NC), in which the participants acted as controls. Total weight of the participants and percentage body fat of the participants both decreased but not in values that were statistically significant. The only statistically significant value was the ratio of android fat to gynoid fat, which increased. Future research will try to replicate this data with statistically significant values for more cycling adolescents with DS.
ContributorsFankhauser, Kristin Marie (Author) / Ringenbach, Shannon (Thesis director) / Shaibi, Gabriel (Committee member) / Hillman, Charles (Committee member) / Barrett, The Honors College (Contributor) / School of Nutrition and Health Promotion (Contributor)
Created2014-05
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How does rate influence brain activity during drumming in persons with Down Syndrome?

Description
Persons with Down Syndrome (DS) have been repeatedly shown to have timing deficits, to move slowly, and to not follow metronomes. This timing deficit in persons with DS requires further study because timing is fundamental to movement control. Furthermore, brain imaging studies have proposed a rate effect in which increased…

Persons with Down Syndrome (DS) have been repeatedly shown to have timing deficits, to move slowly, and to not follow metronomes. This timing deficit in persons with DS requires further study because timing is fundamental to movement control. Furthermore, brain imaging studies have proposed a rate effect in which increased cortical activation in the primary motor cortex was observed during increased finger movement frequency. The aim of the current study was to determine if the rate effect was present in persons with DS by comparing brain activation in self-selected and as fast as possible rates. Eight participants with DS performed unimanual drumming at their self-selected and maximal rates. Movement rate was measured at EEG was collected in the alpha (8-12 Hz) and Beta (13-30 Hz) frequencies from C3 and C4. The results showed that overall, their self-selected rates were slower than their maximal rates, indicating that they are capable of modifying their movement rate with general instructions. Furthermore, there were significant differences in Beta in which there was more activation during as fast as possible than self-selected tapping in both sides of the primary motor cortex in persons with DS. This suggests that their brains are activated in a similar manner as the typical population with respect to movement rate. Overall, our results suggest that while interventions that involve timing to specific rates are difficult, people with DS can perform at self-selected and maximal rates. The results of our study show that they can alter movement rate when provided with general instruction or additional motivation.
ContributorsCarrington, Elise Almader (Author) / Ringenbach, Shannon (Thesis director) / Crews, Debbie (Committee member) / Hillman, Charles (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor) / School of Nutrition and Health Promotion (Contributor)
Created2013-05