Organizational Unit:
School of Biological Sciences
School of Biological Sciences
Permanent Link
Research Organization Registry ID
Description
Previous Names
Parent Organization
Parent Organization
Organizational Unit
Includes Organization(s)
Organizational Unit
ArchiveSpace Name Record
Publication Search Results
Now showing
1 - 3 of 3
-
ItemGrasp Posture Variability Leads to Greater Ipsilateral Sensorimotor Beta Activation during Prosthesis Use Data(Georgia Institute of Technology, 2022) Alterman, Bennett L. ; Ali, Saif ; Keeton, Emily ; Binkley, Katrina ; Hendrix, William ; Lee, Perry J. ; Johnson, John T. ; Wang, Shuo ; Kling, James ; Gale, Mary Kate ; Wheaton, Lewis A.
-
ItemPartial-Hand Prosthesis Users Show Improved Reach-to-Grasp Behaviour Compared to Transradial Prosthesis Users with Increased Task Complexity(Georgia Institute of Technology, 2021) Wheaton, Lewis A. ; Alterman, Bennett L. ; Keeton, Emily ; Ali, Saif ; Binkley, Katrina ; Hendrix, William ; Lee, Perry J. ; Wang, Shuo ; Johnson, John T.Purpose: Approaches to improve outcomes after upper-extremity amputation remain poorly understood. Different levels of amputation may affect prosthetic device acceptance, function, and use. Examining differences in behavioural and functional performance for different levels of prosthesis use may provide vital information about unique motor control challenges across levels of amputation. Materials and methods: Participants without amputation completed simple and complex goal-directed reach-to-grasp motor actions using either a transradial or partial-hand prosthesis simulator. We hypothesised that participants using a partial-hand device would show greater functional adaptation compared to participants using a transradial device, measured by (1) lower movement duration, (2) lower reach duration, (3) higher reach peak velocity, and (4) lower placement error. Second, we hypothesised that increased task complexity would lead to greater functional adaptation, particularly in partial-hand users. Results: In the complex task, partial-hand users demonstrated variable grasp approaches, an effect not seen in the simple task or in transradial users. Partial-hand users showed significantly higher reach peak velocities compared to transradial users, regardless of grasp strategy in the complex but not the simple task. All groups showed decreases in movement duration over time in the complex task, but only partial-hand users improved in the simple task. Conclusion: There is a gap in our understanding of how people adapt to amputations of different levels. This work clarifies how device and environmental constraints contribute to unique action outcomes, and influence motor learning, which is crucial for optimising rehabilitation.
-
ItemKinematic Improvement Differs Between Transradial Versus Partial-Hand Prosthesis Use Following Interlimb Training(Georgia Institute of Technology, 2020-05) Keeton, EmilyAbout 33% of upper extremity amputees reject their prosthetic device due to perceived lack of functionality in daily life (Cusack et al., 2014). A way to bypass the lack of device use during the healing period is to begin training with a prosthesis simulator on the sound limb. This technique is known as interlimb transfer (ILT) and has the goal of allowing for the transfer of learned skills from the trained (non-amputated) limb to the affected limb. To investigate ILT, participants used one of two prosthesis simulators. The transradial prosthesis simulator (TrPS) simulated an amputation between the elbow and wrist, and the partial-hand prosthesis simulator (PhPS) simulated the loss of digits 1-3 at the metacarpophalangeal joint. In addition to being grouped by device (PhPS or TrPS), participants were also grouped into either the training or control group. Both groups underwent an identical pre-test and post-test on day 1 and day 5 of the study consisting of four motor tasks. The training group completed three days of the training paradigm on days 2-4 of the study. It was hypothesized that participants using a partial-hand prosthesis will have shorter movement duration, higher accuracy, higher peak velocity, and lower movement variability compared to participants using a transradial prosthesis. Additionally, it was hypothesized that participants partaking in interlimb training will show decreases in movement duration, increases in accuracy, increases in peak velocity, and decreases in movement variability compared to controls. By examining percent change from the first day of training (day 2) to the final day of training (day 4), it was found that more trials were completed, the time required to complete each trial decreased, and the number of errors committed decreased as the training paradigm progressed which indicates that an improvement was seen in all aspects of training. The PhPS group showed greater changes in performance for all 3 measures compared to the TrPS group which supports the initial hypothesis. In regards to accuracy, for the TrPS group in the metal disk translation task, an ANOVA conducted on average number of errors for both groups (training and control) over the course of the experimental paradigm (day 1 and day 5) resulted in a near significant p-value of 0.0887 between groups (training vs. control). This suggests a trend towards support of the hypothesis with participants partaking in interlimb training showing increases in accuracy compared to controls. According to the preliminary analysis that has been conducted, interlimb transfer appears to improve functional performance when using a prosthesis simulator, and the PhPS group seems to improve the most.