Michael A Samaan1, Hsiang-Ling Teng2, Deepak Kumar3, Sonia Lee4, Thomas M Link5, Sharmila Majumdar6, Richard B Souza7. 1. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California-San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA. Electronic address: michael.samaan@ucsf.edu. 2. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California-San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA. Electronic address: hsiang-ling.teng@ucsf.edu. 3. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California-San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA; Division of Physical Therapy, College of Health Professions, Medical University of South Carolina, 151B Rutledge Avenue, MSC 962, Room B309, Charleston, SC 29425, USA. Electronic address: kumarde@musc.edu. 4. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California-San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA. Electronic address: sonia.lee@ucsf.edu. 5. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California-San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA. Electronic address: thomas.link@ucsf.edu. 6. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California-San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA. Electronic address: sharmila.majumdar@ucsf.edu. 7. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging, University of California-San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA; Department of Physical Therapy and Rehabilitation Science, University of California-San Francisco, 1500 Owens Street, Suite 400, San Francisco, CA 94158, USA. Electronic address: richard.souza@ucsf.edu.
Abstract
BACKGROUND: Patients with acetabular cartilage defects reported increased pain and disability compared to those without acetabular cartilage defects. The specific effects of acetabular cartilage defects on lower extremity coordination patterns are unclear. The purpose of this study was to determine hip and knee joint coordination variability during gait in those with and without acetabular cartilage defects. METHODS: A combined approach, consisting of a semi-quantitative MRI-based quantification method and vector coding, was used to assess hip and knee joint coordination variability during gait in those with and without acetabular cartilage lesions. FINDINGS: The coordination variability of the hip flexion-extension/knee rotation, hip abduction-adduction/knee rotation, and hip rotation/knee rotation joint couplings were reduced in the acetabular lesion group compared to the control group during loading response of the gait cycle. The lesion group demonstrated increased variability in the hip flexion-extension/knee rotation and hip abduction-adduction/knee rotation joint couplings, compared to the control group, during the terminal stance/pre-swing phase of gait. INTERPRETATION: Reduced variability during loading response in the lesion group may suggest reduced movement strategies and a possible compensation mechanism for lower extremity instability during this phase of the gait cycle. During terminal stance/pre-swing, a larger variability in the lesion group may suggest increased movement strategies and represent a compensation or pain avoidance mechanism caused by the load applied to the hip joint.
BACKGROUND:Patients with acetabular cartilage defects reported increased pain and disability compared to those without acetabular cartilage defects. The specific effects of acetabular cartilage defects on lower extremity coordination patterns are unclear. The purpose of this study was to determine hip and knee joint coordination variability during gait in those with and without acetabular cartilage defects. METHODS: A combined approach, consisting of a semi-quantitative MRI-based quantification method and vector coding, was used to assess hip and knee joint coordination variability during gait in those with and without acetabular cartilage lesions. FINDINGS: The coordination variability of the hip flexion-extension/knee rotation, hip abduction-adduction/knee rotation, and hip rotation/knee rotation joint couplings were reduced in the acetabular lesion group compared to the control group during loading response of the gait cycle. The lesion group demonstrated increased variability in the hip flexion-extension/knee rotation and hip abduction-adduction/knee rotation joint couplings, compared to the control group, during the terminal stance/pre-swing phase of gait. INTERPRETATION: Reduced variability during loading response in the lesion group may suggest reduced movement strategies and a possible compensation mechanism for lower extremity instability during this phase of the gait cycle. During terminal stance/pre-swing, a larger variability in the lesion group may suggest increased movement strategies and represent a compensation or pain avoidance mechanism caused by the load applied to the hip joint.
Authors: David C Morgenroth; Jonathan R Medverd; Mahyo Seyedali; Joseph M Czerniecki Journal: Clin Biomech (Bristol, Avon) Date: 2014-04-24 Impact factor: 2.063
Authors: Deepak Kumar; Alexander Dillon; Lorenzo Nardo; Thomas M Link; Sharmila Majumdar; Richard B Souza Journal: PM R Date: 2014-02-14 Impact factor: 2.298
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Authors: Valentina Pedoia; Michael A Samaan; Gaurav Inamdar; Matthew C Gallo; Richard B Souza; Sharmila Majumdar Journal: J Orthop Res Date: 2017-08-11 Impact factor: 3.494
Authors: Michael A Samaan; Valentina Pedoia; Matthew S Tanaka; Richard B Souza; C Benjamin Ma; Xiaojuan Li Journal: J Appl Biomech Date: 2022-01-18 Impact factor: 1.833