Background: The patellar tendon reflex (PTR) is an important spinal reflex and an important diagnostic tool assessing neurological disturbances. Reflexes are conveniently assessed but quantifying the response can be subjective. Motion analysis is commonly used to assess gait kinematics in a variety of populations. It can be used to objectively assess the PTR with the advantage that standard technique and hammer can be used without the need for bulky apparatus or fixing the subject position.
Aim: To compare the PTR in 15 cerebral palsy (CP) children with age and height matched controls.
Methods: EMG reflex latency in the rectus femoris was assessed using a Noraxon 2400T unit. Knee movement latency, knee angular displacement and peak angular velocity were captured using the CODA mpx 30 system.
Results: EMG reflex latency was significantly reduced in CP compared to control limbs (13.11 versus 18.11 ms; p < 0.01) confirming a 'brisk' response in this population. The kinematic data found that while knee angular displacement was significantly reduced in CP (12.82° versus 20.06°; p < 0.01) there was no significant difference in movement latency or peak angular velocity compared to controls.
Conclusions: Subjective evaluation of the PTR relies mostly on change in knee angle. Using motion analysis we have confirmed a difference in this variable in CP compared to controls. We have also shown reduced reflex latency associated with a brisk reflex. Knee movement latency and peak angular velocity did not differentiate CP from normal. Further examination of the knee angular response of the PTR is warranted in CP.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1007/s11845-015-1369-3 | DOI Listing |
Knee Surg Sports Traumatol Arthrosc
December 2024
Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany.
Purpose: To biomechanically evaluate a flat posterior cruciate ligament (PCL) reconstruction utilizing rectangular femoral bone tunnels.
Methods: Eight fresh-frozen human knee specimens were tested in a six-degrees-of-freedom robotic test setup. In each testing step, a force-controlled test protocol was performed, including 89 N posterior tibial translation (PTT) in neutral, internal and external rotation, from 0 to 90° of flexion.
J Exp Orthop
January 2025
Department of Orthopedic Surgery and Traumatology, Freiburg University Hospital Albert Ludwigs University Freiburg Freiburg Germany.
Introduction: The medial patellofemoral ligament (MPFL) is the main patellar stabilizer in low knee flexion degrees (0-30°). Isolated MPFL reconstruction (MPFLr) is therefore considered the gold standard of surgical procedures for low flexion patellofemoral instabilities (PFIs). Despite excellent clinical results, little is known about the effect of MPFLr on kinematic parameters (KPs) of the patellofemoral joint in vivo.
View Article and Find Full Text PDFBMC Musculoskelet Disord
December 2024
Division of Orthopaedic and Trauma Surgery, University Hospitals of Geneva, 4 Rue Gabrielle-Perret-Gentil, Geneva, CH-1205, Switzerland.
Purpose: Trochlear dysplasia is found in 3.2% (95% confidence interval (CI) 1.2-6.
View Article and Find Full Text PDFFront Surg
December 2024
Department of Orthopedics, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, Shandong, China.
Background: Hemophilic arthritis (HA) is associated with significant changes in the morphology of mature knee joints due to abnormal growth plate development. Previous studies have established marked distinctions between the femur and tibia of subjects with Haemophilia and those with osteoarthritis (OA). This study explored the morphological characteristics of the patella and patellofemoral joint in subjects with Haemophilia.
View Article and Find Full Text PDFBMC Musculoskelet Disord
December 2024
Center for Joint Surgery, The First Hospital Affiliated to Army Medical University, Chongqing, 400038, China.
Background: Although chronic quadriceps tendon rupture and defect are rare, they pose significant challenges in surgical treatment. In these cases, quadriceps tendon reconstruction is necessary. Either autologous or allogeneic tendons have been used for this reconstruction.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!