Clinical Biomechanics: Pediatric Orthopedics and Musculoskeletal Modeling

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Clinical Biomechanics: Pediatric Orthopedics & Musculoskeletal Modeling

Clinical Biomechanics: Pediatric Orthopedics and Musculoskeletal Modeling

Our main research focus is to understand the biomechanical function in normal and pathological human motion, especially gait. Computerized movement analysis is used as a tool to mediate a better fundamental understanding of human locomotion to physicians, physiotherapists, biomechanists, and scientists.

The UKBB has a modern movement analysis laboratory equipped with a motion capture system (Vicon, 18 cameras), four force plates (Kistler) and a plate measuring foot pressure (Novel) in line, 16 channel surface electromyography system (Noraxon), and 2 high speed video cameras (Basler). With this equipment we measure the required biomechanical parameters needed to answer scientific questions. We calculate three dimensional parameters such as joint angles (kinematics), joint moments and powers (kinetics), temporospatial parameters, center of mass, center of pressure, and muscle activation patterns. To do so, we use software programs such as MATLAB. We also use specialized modelling software (AnyBody and OpenSim) to simulate a variety of parameters by inverse dynamics. Parameters such as stress, strain and deformations are calculated by finite element analysis with the ANSYS software. A special foot model is applied for foot deformities. The new software is implemented in daily clinical work.

Furthermore, our research focuses on clinical outcome of treatment in the field of pediatric neuro-orthopaedics. This includes determination of a deformity for gait and its correction by orthotic or surgical treatment as well as the evaluation of particular surgical or orthotic techniques in a certain patient population (such as cerebral palsy) and problems independent of gait (such as hip dislocation).

Scientific publications (last 5 years)

Bangerter C, Romkes J, Lorenzetti S, Krieg AH, Hasler CC, Brunner R, Schmid S (2019). What are the biomechanical consequences of a structural leg length discrepancy on the adolescent spine during walking? Gait Posture. 68:506-513. doi: 10.1016/j.gaitpost.2018.12.040

Haberfehlner H, Jaspers RT, Rutz E, Harlaar J, van der Sluijs JA, Witbreuk MM, van Hutten K, Romkes J, Freslier M, Brunner R, Becher JG, Maas H, Buizer AI (2018). Outcome of medial hamstring lengthening in children with spastic paresis: A biomechanical and morphological observational study. PLoS One. 13(2):e0192573. doi: 10.1371/journal.pone.0192573

Galli M, Cimolin V, Condoluci C, Costici PF, Brunner R (2018). An examination of the relationship between dynamic knee joint stiffness and gait pattern of children with cerebral palsy. J Bodyw Mov Ther. 22(3):747-751. doi: 10.1016/j.jbmt.2017.11.009

Kläusler M, Speth BM, Brunner R, Tirosh O, Camathias C, Rutz E (2017). Long-term follow-up after tibialis anterior tendon shortening in combination with Achilles tendon lengthening in spastic equinus in cerebral palsy. Gait Posture. 58:457-462. doi: 10.1016/j.gaitpost.2017.08.028

Bracht-Schweizer K, Freslier M, Krapf S, Romkes J (2017). Visual targeting one step before force plates has no effect on gait parameters in orthopaedic patients during level walking. Gait Posture. 58:13-18. doi: 10.1016/j.gaitpost.2017.07.031

Schmid S, Bruhin B, Ignasiak D, Romkes J, Taylor WR, Ferguson SJ, Brunner R, Lorenzetti S (2017). Spinal kinematics during gait in healthy individuals across different age groups. Hum Mov Sci. 54:73-81. doi: 10.1016/j.humov.2017.04.001

Romkes J, Bracht-Schweizer K (2017). The effects of walking speed on upper body kinematics during gait in healthy subjects. Gait Posture. 54:304-310. doi: 10.1016/j.gaitpost.2017.03.025

Angelico F, Freslier M, Romkes J, Brunner R, Schmid S (2017). Upper extremity motion during gait in adolescents with structural leg length discrepancy - An exploratory study. Gait Posture. 53:115-120. doi: 10.1016/j.gaitpost.2017.01.003

Schmid S, Romkes J, Taylor WR, Lorenzetti S, Brunner R (2016). Orthotic correction of lower limb function during gait does not immediately influence spinal kinematics in spastic hemiplegic cerebral palsy. Gait Posture. 49:457-462. doi: 10.1016/j.gaitpost.2016.08.013

Haberfehlner H, Jaspers RT, Rutz E, Becher JG, Harlaar J, van der Sluijs JA, Witbreuk MM, Romkes J, Freslier M, Brunner R, Maas H, Buizer AI (2016). Knee Moment-Angle Characteristics and Semitendinosus Muscle Morphology in Children with Spastic Paresis Selected for Medial Hamstring Lengthening. PLoS One. 18;11(11):e0166401. doi: 10.1371/journal.pone.0166401

Suica Z, Romkes J, Tal A, Maguire C (2016). Walking with a four wheeled walker (rollator) significantly reduces EMG lower-limb muscle activity in healthy subjects. J Bodyw Mov Ther. 20(1):65-73. doi: 10.1016/j.jbmt.2015.06.002

Schmid S, Studer D, Hasler CC, Romkes J, Taylor WR, Lorenzetti S, Brunner R (2016). Quantifying spinal gait kinematics using an enhanced optical motion capture approach in adolescent idiopathic scoliosis. Gait Posture. 44:231-7. doi: 10.1016/j.gaitpost.2015.12.036

Maguire C, Sieben JM, Scheidhauer H, Romkes J, Suica Z, de Bie RA (2016). The effect of crutches, an orthosis TheraTogs, and no walking aids on the recovery of gait in a patient with delayed healing post hip fracture: A case report. Physiother Theory Pract. 32(1):69-81. doi: 10.3109/09593985.2015.1075640

Romkes J, Schweizer K (2015). Immediate effects of unilateral restricted ankle motion on gait kinematics in healthy subjects. Gait Posture. 2015 Mar;41(3):835-40. doi: 10.1016/j.gaitpost.2015.02.015

Meyer U, Ernst D, Schott S, Riera C, Hattendorf J, Romkes J, Granacher U, Göpfert B, Kriemler S (2015). Validation of two accelerometers to determine mechanical loading of physical activities in children. J Sports Sci. 33(16):1702-9. doi: 10.1080/02640414.2015.1004638

Schmid S, Studer D, Hasler CC, Romkes J, Taylor WR, Brunner R, Lorenzetti S (2015). Using Skin Markers for Spinal Curvature Quantification in Main Thoracic Adolescent Idiopathic Scoliosis: An Explorative Radiographic Study. PLoS One. 13;10(8):e0135689. doi: 10.1371/journal.pone.0135689. eCollection 2015

Sossai R, Vavken P, Brunner R, Camathias C, Graham HK, Rutz E (2015). Patellar tendon shortening for flexed knee gait in spastic diplegia. Gait Posture. 41(2):658-65. doi: 10.1016/j.gaitpost.2015.01.018