The validity and reliability of modelled neural and tissue properties of the ankle muscles in children with cerebral palsy
| Autor: | Carel G. M. Meskers, Lizeth H. Sloot, Karin L. de Gooijer-van de Groep, Marjolein M. van der Krogt, Jaap Harlaar, Jurriaan H. de Groot, Annemieke I. Buizer, Erwin de Vlugt, Stijn van Eesbeek, Jules G. Becher |
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| Přispěvatelé: | Physiology, Research Institute MOVE, Rehabilitation medicine, MOVE Research Institute |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Male
medicine.medical_specialty Muscle stiffness SDG 16 - Peace Models Neurological Biophysics Neuromuscular Junction Validity Electromyography Cerebral palsy Spastic cerebral palsy Physical medicine and rehabilitation Reference Values medicine Humans Orthopedics and Sports Medicine Biomechanics Spasticity Range of Motion Articular Child Muscle Skeletal medicine.diagnostic_test Reflex Abnormal Rehabilitation SDG 16 - Peace Justice and Strong Institutions Reproducibility of Results medicine.disease Justice and Strong Institutions medicine.anatomical_structure Reflex Female Muscle spasticity medicine.symptom Ankle Psychology Ankle Joint |
| Zdroj: | Gait and Posture, 42(1), 7-15. Elsevier Gait and Posture, 42(1), 7-15 Sloot, L H, van der Krogt, M M, de Gooijer-van Groep, K, van Eesbeek, S, de Groot, J, Buizer, A I, Meskers, C, Becher, J G, de Vlugt, E & Harlaar, J 2015, ' The validity and reliability of modelled neural and tissue properties of the ankle muscles in children with cerebral palsy ', Gait and Posture, vol. 42, no. 1, pp. 7-15 . https://doi.org/10.1016/j.gaitpost.2015.04.006 |
| ISSN: | 0966-6362 |
| Popis: | Spastic cerebral palsy (CP) is characterized by increased joint resistance, caused by a mix of increased tissue stiffness, as well as involuntary reflex and background muscle activity. These properties can be quantified using a neuromechanical model of the musculoskeletal complex and instrumented assessment. The construct validity of the neuromechanical parameters was examined (i.e. the internal model validity, effect of knee angle, speed and age, sensitivity to patients versus controls, spasticity severity and treatment), together with the repeatability. We included 38 children with CP and 35 controls. A motor driven footplate applied two slow (15°/s) and two fast (100°/s) rotations around the ankle joint, at two different knee angles. Ankle angle, torque and EMG of the gastrocnemius (GA), soleus (SO) and tibialis anterior (TA) muscle were used to optimize a nonlinear neuromuscular model. Outcome measures were tissue stiffness, reflex and background activity for GA, SO and TA. The internal model validity showed medium to high parameter confidence and good model fits. All parameter could discriminate between patients with CP and controls according to CP pathology. Other measures of external model validity (effect of test position, speed and age) showed behaviour along the lines of current knowledge of physiology. GA/SO background activity was sensitive to spasticity severity, but reflex activity was not. Preliminary data indicated that reflex activity was reduced after spasticity treatment. The between-trial and -day repeatability was moderate to good. The large variance between patients in the ratio of stiffness and neural resistance indicates that the method could potentially contribute to patient-specific treatment selection. |
| Databáze: | OpenAIRE |
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