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Characterizing the Role of Arm Configuration on Patterns of Movement Variability in 3D Space

Description

Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has…

Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has been mostly ignored. Characterizing the influence of arm configuration (i.e. intrinsic factors) would allow greater comprehension of sensorimotor integration and assist in interpreting exaggerated movement variability in patients. In this study, subjects were placed in a 3-D virtual reality environment and were asked to move from a starting position to one of three targets in the frontal plane with and without visual feedback of the moving limb. The alternating of visual feedback during trials increased uncertainty between the planning and execution phases. The starting limb configurations, adducted and abducted, were varied in separate blocks. Arm configurations were setup by rotating along the shoulder-hand axis to maintain endpoint position. The investigation hypothesized: 1) patterns of endpoint variability of movements would be dependent upon the starting arm configuration and 2) any differences observed would be more apparent in conditions that withheld visual feedback. The results indicated that there were differences in endpoint variability between arm configurations in both visual conditions, but differences in variability increased when visual feedback was withheld. Overall this suggests that in the presence of visual feedback, planning of movements in 3D space mostly uses coordinates that are arm configuration independent. On the other hand, without visual feedback, planning of movements in 3D space relies substantially on intrinsic coordinates.

ContributorsRahman, Qasim (Author) / Buneo, Christopher (Thesis director) / Helms Tillery, Stephen (Committee member) / Barrett, The Honors College (Contributor) / Harrington Bioengineering Program (Contributor)

Created2014-05

Characterizing the Role of Arm Configuration on Patterns of Movement Variability in 3D Space

Description

Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has…

Motor behavior is prone to variable conditions and deviates further in disorders affecting the nervous system. A combination of environmental and neural factors impacts the amount of uncertainty. Although the influence of these factors on estimating endpoint positions have been examined, the role of limb configuration on endpoint variability has been mostly ignored. Characterizing the influence of arm configuration (i.e. intrinsic factors) would allow greater comprehension of sensorimotor integration and assist in interpreting exaggerated movement variability in patients. In this study, subjects were placed in a 3-D virtual reality environment and were asked to move from a starting position to one of three targets in the frontal plane with and without visual feedback of the moving limb. The alternating of visual feedback during trials increased uncertainty between the planning and execution phases. The starting limb configurations, adducted and abducted, were varied in separate blocks. Arm configurations were setup by rotating along the shoulder-hand axis to maintain endpoint position. The investigation hypothesized: 1) patterns of endpoint variability of movements would be dependent upon the starting arm configuration and 2) any differences observed would be more apparent in conditions that withheld visual feedback. The results indicated that there were differences in endpoint variability between arm configurations in both visual conditions, but differences in variability increased when visual feedback was withheld. Overall this suggests that in the presence of visual feedback, planning of movements in 3D space mostly uses coordinates that are arm configuration independent. On the other hand, without visual feedback, planning of movements in 3D space relies substantially on intrinsic coordinates.

ContributorsRahman, Qasim (Author) / Buneo, Christopher (Thesis director) / Helms Tillery, Stephen (Committee member) / Barrett, The Honors College (Contributor) / Harrington Bioengineering Program (Contributor)

Created2014-05

Behavioral Basis of Sensorimotor Control and Learning

Description

Motor learning is the process of improving task execution according to some measure of performance. This can be divided into skill learning, a model-free process, and adaptation, a model-based process. Prior studies have indicated that adaptation results from two complementary learning systems with parallel organization. This report attempted to answer…

Motor learning is the process of improving task execution according to some measure of performance. This can be divided into skill learning, a model-free process, and adaptation, a model-based process. Prior studies have indicated that adaptation results from two complementary learning systems with parallel organization. This report attempted to answer the question of whether a similar interaction leads to savings, a model-free process that is described as faster relearning when experiencing something familiar. This was tested in a two-week reaching task conducted on a robotic arm capable of perturbing movements. The task was designed so that the two sessions differed in their history of errors. By measuring the change in the learning rate, the savings was determined at various points. The results showed that the history of errors successfully modulated savings. Thus, this supports the notion that the two complementary systems interact to develop savings. Additionally, this report was part of a larger study that will explore the organizational structure of the complementary systems as well as the neural basis of this motor learning.

ContributorsRuta, Michael (Author) / Santello, Marco (Thesis director) / Blais, Chris (Committee member) / School of Mathematical and Statistical Sciences (Contributor) / School of Molecular Sciences (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)

Created2021-05

The Arizona Global Development Network and The United Nations Sustainable Development Goals: A Case Study of Arizona’s NGOs

Description

The Arizona Global Development Network (AGDN) is a group of diverse nonprofit organizations within the state. This network is a platform for member organizations to collaborate and exchange ideas on a wide range of topics regarding international development. Announced in 2016, the United Nations Sustainable Development Goals (SDGs) consists of…

The Arizona Global Development Network (AGDN) is a group of diverse nonprofit organizations within the state. This network is a platform for member organizations to collaborate and exchange ideas on a wide range of topics regarding international development. Announced in 2016, the United Nations Sustainable Development Goals (SDGs) consists of 17 goals determined by the United Nations to address complex issues regarding human health, inequality and the environment around the globe. This self-designed code categorization study and semi-structured qualitative interviews aimed to explore Arizona’s international impacts and its alignment to the SDGs. First, the study completed a comprehensive observation of the information presented on these organizations’ websites. Second, interviews were conducted with representatives from each organization. The findings of this study provide an in-depth understanding of the network’s contributions to the wider, international community.

ContributorsRegorgo, Ray Gerard Lunar (Author) / Cruz-Torres, Maria (Thesis director) / Gutierrez, Veronica (Committee member) / Ortiz, Anna (Committee member) / School of Human Evolution & Social Change (Contributor) / School of Politics and Global Studies (Contributor) / Barrett, The Honors College (Contributor)

Created2021-05

Research and Design of an Epilepsy Clinic in Developing Countries Based on Sustainability and Ambient Environment

Description

Worldwide there are over 50 million people suffering from epilepsy, eighty percent (80%) of whom live in low to middle income countries. Of that eighty percent (80%) of people suffering from this disease, seventy-five percent (75%) do not receive treatment. The current design and treatment methods of epilepsy have many…

Worldwide there are over 50 million people suffering from epilepsy, eighty percent (80%) of whom live in low to middle income countries. Of that eighty percent (80%) of people suffering from this disease, seventy-five percent (75%) do not receive treatment. The current design and treatment methods of epilepsy have many limitations in these specific countries. These limitations include: lack of education about the disease leading to stigmas surrounding it, inability to afford treatment options, and the absence of healthcare practitioners who specialize in the treatment of neurological illnesses. Additionally, the healthcare system worldwide is a large contributor to climate change calling for a need to implement sustainable practices in both the treatment of patients and creation of healthcare centers. This thesis has been developed in order to theorize the design of a clinic that can be beneficial to epileptics in developing countries and to the environment. Through the methodology of case studies and research on existing strategies implemented in specific hospitals, we were able to focus on three main aspects that should be taken into consideration for an epilepsy clinic: the ambient environment, sustainability, and target demographic - developing countries. The idea ambient environment, it was found, plays a large role in the healing process through reduction of stress on patients. From there the most important features specific to epilepsy were able to be considered and synthesized for the best possible theoretical design of a clinic focused on the treatment and diagnosis of epilepsy in a developing country.

ContributorsPenrose, Nicole Ellen Youzhi (Co-author) / Gonzalez, Bianca (Co-author) / Vallerand, Olivier (Thesis director) / Brunner, Lori (Committee member) / School of Human Evolution & Social Change (Contributor) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)

Created2019-05

Devil Crate - Changing the Food Culture at ASU Tempe

Description

There are issues at the Arizona State University Tempe campus with the culture of food and many of these issues stem from the dining halls. To determine the extent of this problem, our group conducted research on the Tempe campus through student surveys and in person discussions. What we found…

There are issues at the Arizona State University Tempe campus with the culture of food and many of these issues stem from the dining halls. To determine the extent of this problem, our group conducted research on the Tempe campus through student surveys and in person discussions. What we found were limitations in both the healthy options and hours of operations at the dining halls. Students also showed general dissatisfaction with their diets. Our solution is the Devil Crate, a subscription box that conveniently delivers healthy food along with a personal touch. The recipes, health information and tips inside the subscription box are given to motivate students to eat healthy. We also realized that this solution could potentially solve another issue facing our community, which is food waste. The sustainably sourced food allows the price of Devil Crate to be lowered while eliminating the waste of produce. Once this solution was formulated, a test trial was conducted to measure the demand for such a product among students. The Devil Crate was produced, sold, and delivered to 2 students, both of whom were pleased and willing to recommend Devil Crate to others. The end goal is to incorporate Devil Crate into the meal plans to offer more options in this limited food environment and promote healthy eating among students.

ContributorsDemangone, Michael Richard (Co-author) / Pham, Emily (Co-author) / Anderson, Andrew (Co-author) / Van Vleck, Calista (Co-author) / Byrne, Jared (Thesis director) / Sebold, Brent (Committee member) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)

Created2020-05