TY - JOUR
T1 - Patellofemoral pain syndrome alters neuromuscular control and kinetics during stair ambulation
AU - Aminaka, Naoko
AU - Pietrosimone, Brian G.
AU - Armstrong, Charles W.
AU - Meszaros, Andrew
AU - Gribble, Phillip A.
PY - 2011/8
Y1 - 2011/8
N2 - The aim of the study was to investigate differences in frontal plane knee kinetics, onset timing and duration of the gluteus medius (GMed), adductor longus (AL), and vastus medialis oblique (VMO) during stair ambulation between those with and without patellofemoral pain syndrome (PFPS). Twenty PFPS patients and twenty healthy participants completed stair ambulation while surface electromyography (EMG), video, and ground reaction forces were collected. PFPS patients had a higher peak internal knee abduction moment during stair ascent, and a higher internal knee abduction impulse for both ascent and descent. During stair ascent, PFPS patients displayed earlier onset of the AL and later onset of GMed, compared to the healthy individuals. Also, PFPS patients had longer activation duration of the AL and shorter activation durations of the VMO and GMed during stair ascent. During stair descent, PFPS patients displayed delayed GMed onset and shorter activation duration of GMed and VMO. The results of the study suggest that altered neuromuscular control of the medial thigh musculature may be an important contributor to PFPS.
AB - The aim of the study was to investigate differences in frontal plane knee kinetics, onset timing and duration of the gluteus medius (GMed), adductor longus (AL), and vastus medialis oblique (VMO) during stair ambulation between those with and without patellofemoral pain syndrome (PFPS). Twenty PFPS patients and twenty healthy participants completed stair ambulation while surface electromyography (EMG), video, and ground reaction forces were collected. PFPS patients had a higher peak internal knee abduction moment during stair ascent, and a higher internal knee abduction impulse for both ascent and descent. During stair ascent, PFPS patients displayed earlier onset of the AL and later onset of GMed, compared to the healthy individuals. Also, PFPS patients had longer activation duration of the AL and shorter activation durations of the VMO and GMed during stair ascent. During stair descent, PFPS patients displayed delayed GMed onset and shorter activation duration of GMed and VMO. The results of the study suggest that altered neuromuscular control of the medial thigh musculature may be an important contributor to PFPS.
KW - Adductor longus
KW - Chronic knee pain
KW - Electromyography
KW - Gluteus medius
KW - Vastus medialis
UR - http://www.scopus.com/inward/record.url?scp=79959319230&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79959319230&partnerID=8YFLogxK
U2 - 10.1016/j.jelekin.2011.03.007
DO - 10.1016/j.jelekin.2011.03.007
M3 - Article
C2 - 21524921
AN - SCOPUS:79959319230
SN - 1050-6411
VL - 21
SP - 645
EP - 651
JO - Journal of Electromyography and Kinesiology
JF - Journal of Electromyography and Kinesiology
IS - 4
ER -