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Knee joint angular velocities and accelerations during the patellar tendon jerk.

Authors
Lebiedowska-MK; Sikdar-S; Eranki-A; Garmirian-L
Source
J Neurosci Methods 2011 Jun; 198(2):255-259
NIOSHTIC No.
20039196
Abstract
Tendon jerk (TJ) is one of the most commonly used clinical tests in differential diagnosis of human motor disorders. There remains some ambiguity in the physiological interpretation of the test, especially with respect to its association to the functional status of patients. The TJ test inputs a non-physiological stimuli, but it is unclear to what degree the kinematics generated during the TJ test exceed the ranges that muscles encounter in activities of daily living (ADLs). The aim of our pilot study was to determine the range of angular knee kinematics (angular velocities and accelerations) corresponding to the muscle stretch elicited by TJ. We measured the longitudinal kinematics (velocities and accelerations) of the rectus femoris muscle in vivo using vector tissue Doppler imaging, an ultrasound-based method, and measured the angular kinematics of the knee in response to tendon taps with an electrogoniometer. We concluded that muscle longitudinal elongation accelerations elicited during the standard TJ test exceed angular accelerations (104.40-4534.20 rads-2) encountered in typical ADLs, but the velocities (0.82-6.21 rads-1) elicited do not exceed those elicited by ADLs.
Keywords
Humans; Men; Women; Physical-reactions; Physiological-factors; Physiological-effects; Muscles; Muscle-function; Knee-injuries; Knee-disorders; Author Keywords: Human; Stretch reflex; Monosynaptic reflex; Ultrasound; Imaging; Rectus femoris
Contact
Maria K. Lebiedowska, Health Effects Lab Division, Engineering and Control Technology Branch, National Institute for Occupational Safety and Health, 1095 Willowdale Road MS 2027, Morgantown, WV 26505
CODEN
JNMEDT
Publication Date
20110615
Document Type
Journal Article
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Issue of Publication
2
ISSN
0165-0270
NIOSH Division
HELD
Source Name
Journal of Neuroscience Methods
State
IL; WV; VA
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