Related Experiment Videos
Three-dimensional load analysis of indentation stimulators
Geoffrey M Bove1, Daniel R Robichaud, Peter Grigg
1Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Dana 721, Boston, MA 02215, USA. gbove@caregroup.harvard.edu
Journal of Neuroscience Methods
|February 13, 2003
Summary
This study evaluated indentation stimulators, finding electromechanical devices offer the most consistent and controlled loads. Filament and spring gauge indenters showed variability, especially off-axis loads, impacting accuracy.
Area of Science:
- Biomedical Engineering
- Mechanical Engineering
- Biomechanics
Background:
- Accurate indentation force application is crucial for various biomechanical and material science applications.
- Existing indentation stimulators, including filament and spring gauge types, exhibit limitations in load control and consistency.
Purpose of the Study:
- To evaluate and compare the performance characteristics of three types of indentation stimulators: filament indenters, spring gauge indenters, and electromechanical stimulators.
- To quantify the on-axis and off-axis loads produced by each device under controlled conditions.
Main Methods:
- Actuation of filament indenters, a spring gauge indenter, and an electromechanical stimulator against a 3-direction load cell.
- Systematic analysis of on-axis and off-axis loads generated by each device, considering factors like buckling and handle offset.
Main Results:
- Filament indenters produced buckling-independent on-axis loads, but off-axis loads increased with buckling (up to 25% of on-axis).
- Spring gauge indenters, particularly when hand-held, generated significant off-axis loads, leading to underestimation of true on-axis loads.
- Electromechanical stimulators demonstrated high load consistency and minimal off-axis loads when properly configured.
Conclusions:
- Electromechanical stimulators provide superior precision and consistency for indentation force application compared to filament and spring gauge types.
- Variability in off-axis loads from filament and spring gauge indenters can compromise measurement accuracy, especially in hand-held applications.