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J. Funct. Morphol. Kinesiol. 2016, 1(1), 6-15; doi:10.3390/jfmk1010006

Changes in Sagittal Plane Kinematics and Kinetics after Distal Release of Medial Hamstrings in Cerebral Palsy

1
Department of Orthopaedic Surgery, Ain Shams University, 11591 Cairo, Egypt
2
Division of Pediatric Orthopaedics, The Duchess of Kent Children's Hospital, Hong Kong University, Hong Kong, China
*
Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Musumeci
Received: 5 August 2015 / Revised: 18 August 2015 / Accepted: 19 August 2015 / Published: 24 August 2015
View Full-Text   |   Download PDF [648 KB, uploaded 24 August 2015]   |  

Abstract

The purpose of this study is to analyze the effect of distal release of the medial hamstrings on the gait of patients who had spastic cerebral palsy. Twenty-two patients had preoperative and postoperative gait analysis. Standard parameters, such as cadence, velocity, and stride length, were evaluated, as were sagittal plane motion graphs of the pelvis, hip, knee, and ankle, in addition to sagittal plane kinetic analysis. Extension of the knee in stance phase significantly improved postoperatively (p < 0.002), and the improvement was accompanied by a proportional decrease in knee flexion during swing with minimal net gain in the arc of knee motion. Knee range of motion could be improved more by concomitant rectus transfer in selected patients. The statistically significant increase in anterior pelvic tilt (p < 0.002) has been a main concern. There was no significant change in the hip extensor moments or power generation during stance. Increased knee extension during stance after distal release of medial hamstrings is the kinematic gain that improved the gait pattern in cerebral palsy patients. The authors recommend a concomitant rectus transfer to help improve the knee range of motion in patients with rectus over-firing during swing, hence avoiding a stiff knee gait. View Full-Text
Keywords: cerebral palsy; hamstrings release; flexion contracture; gait analysis; sagittal kinematics; sagittal kinetics cerebral palsy; hamstrings release; flexion contracture; gait analysis; sagittal kinematics; sagittal kinetics
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Eid, M.A.-M.; To, M.K.-T.; Chow, W. Changes in Sagittal Plane Kinematics and Kinetics after Distal Release of Medial Hamstrings in Cerebral Palsy. J. Funct. Morphol. Kinesiol. 2016, 1, 6-15.

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J. Funct. Morphol. Kinesiol. EISSN 2411-5142 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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