TY - GEN
T1 - Haptic simulation of elbow joint spasticity
AU - Grow, David I.
AU - Wu, Mengnan
AU - Locastro, Michael J.
AU - Arora, Sugandha K.
AU - Bastian, Amy J.
AU - Okamura, Allison M.
PY - 2008
Y1 - 2008
N2 - Spasticity is a human motor system disorder in which reflexive muscle activity becomes unregulated, causing unwanted contractions that can interfere with voluntary movement. We present a simulator that replicates spastic arm dynamics for clinical training of physical therapists and neurologists. Accurate clinical assessment of spasticity is critical in the determination of patient treatment, although physical evidence of spasticity is often confused with that of related neuromuscular disorders. By repeatably simulating different levels of spastic severity, we hope to improve clinician training for rating spasticity and consequently decrease the variability of ratings between raters and within raters. Our haptic device, designed to replicate the spastic elbow of a child, uses a brake actuator and high-resolution optical encoder. Two competing spasticity models from the literature are implemented. Preliminary experiments indicate that the decreased stretch reflex threshold model is more realistic than the increased stiffness model. The simulator improves on training with patients, since spastic severity can be readily adjusted under controlled and repeatable conditions.
AB - Spasticity is a human motor system disorder in which reflexive muscle activity becomes unregulated, causing unwanted contractions that can interfere with voluntary movement. We present a simulator that replicates spastic arm dynamics for clinical training of physical therapists and neurologists. Accurate clinical assessment of spasticity is critical in the determination of patient treatment, although physical evidence of spasticity is often confused with that of related neuromuscular disorders. By repeatably simulating different levels of spastic severity, we hope to improve clinician training for rating spasticity and consequently decrease the variability of ratings between raters and within raters. Our haptic device, designed to replicate the spastic elbow of a child, uses a brake actuator and high-resolution optical encoder. Two competing spasticity models from the literature are implemented. Preliminary experiments indicate that the decreased stretch reflex threshold model is more realistic than the increased stiffness model. The simulator improves on training with patients, since spastic severity can be readily adjusted under controlled and repeatable conditions.
KW - B.4.m [hardware]: general
KW - H.5.2 [information interfaces and presentation]: user interfaces - haptic I/O
KW - J.2 [computer applications]: physical sciences and engineering-engineering
KW - J.3 [computer applications]: life and medical sciences - health
UR - http://www.scopus.com/inward/record.url?scp=49749096839&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=49749096839&partnerID=8YFLogxK
U2 - 10.1109/HAPTICS.2008.4479997
DO - 10.1109/HAPTICS.2008.4479997
M3 - Conference contribution
AN - SCOPUS:49749096839
SN - 9781424420056
T3 - Symposium on Haptics Interfaces for Virtual Environment and Teleoperator Systems 2008 - Proceedings, Haptics
SP - 475
EP - 476
BT - Symposium on Haptics Interfaces for Virtual Environment and Teleoperator Systems 2008 - Proceedings, Haptics
T2 - Symposium on Haptics Interfaces for Virtual Environment and Teleoperator Systems 2008 - Haptics
Y2 - 13 March 2008 through 14 March 2008
ER -