dc.contributor.author | Maikala, Rammohan V. | |
dc.contributor.author | Ciriello, Vincent M. | |
dc.contributor.author | O'Brien, Niall V. | |
dc.contributor.author | Banks, Jacob J. | |
dc.contributor.author | Rivard, Amanda J. | |
dc.date.accessioned | 2012-10-18T08:36:39Z | |
dc.date.available | 2012-10-18T08:36:39Z | |
dc.date.issued | 2012-02-27 | |
dc.identifier.citation | p. 508-512 | en_US |
dc.identifier.isbn | 978-145771989-9 | |
dc.identifier.uri | http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6179070 | |
dc.identifier.uri | http://dspace.unimap.edu.my/123456789/21424 | |
dc.description | Link to publisher's homepage at http://ieeexplore.ieee.org/ | en_US |
dc.description.abstract | We evaluated local hemodynamic responses
simultaneously from flexor and extensor muscles in the forearm of 14 male workers while performing repetitive ulnar deviation task for 8 hours. First, a psychophysical
approach was utilized to identify participants’ maximum acceptable torque (in Nm) at 15 and 25 repetitions per min (rpm). Second, while performing an ulnar deviation task repetitively for 8 hours at their psychophysically acceptable torque, Tissue Oxygenation Index (TOI) and Tissue Hemoglobin Index (THI) were collected. Workers exerted
lower acceptable torque for the task with a repetition rate of 25 rpm as compared to 15 rpm (3.57 ± 2.7 versus 3.97 ± 2.5 Nm, P=0.014). When the TOI responses (representing muscle oxygen saturation) after each hour of effort were matched for the net acceptable torque exerted, the mean
TOI-torque ratio was 10.2% higher in the flexor region as compared to the extensor region throughout the workday. Also, when corrected for the torque exerted during both the 15 rpm and 25 rpm tasks, a dynamic adjustment of THI (representing muscle blood volume) to the time course of TOI resulted, suggesting a strong coupling between muscle
blood flow and oxygen uptake as the task continued. Although the acceptable torque exerted was lowest for the 25 rpm task, the increased TOI-torque ratio coupled with
increased THI per torque generated suggests that working at 25 rpm is metabolically more challenging than at 15 rpm. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Institute of Electrical and Electronics Engineers (IEEE) | en_US |
dc.relation.ispartofseries | Proceedings of the International Conference on Biomedical Engineering (ICoBE 2012) | en_US |
dc.subject | Ulnar deviation | en_US |
dc.subject | Maximum acceptable torque | en_US |
dc.subject | Near-infrared spectroscopy | en_US |
dc.title | Use of near-infrared spectroscopy in evaluating upper extremity muscle hemodynamics during an eight-hour exposure to repetitive hand-wrist motions | en_US |
dc.type | Working Paper | en_US |
dc.contributor.url | rammohan.maikala@libertymutual.com | en_US |