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Gutierrez-Farewik, ElenaORCID iD iconorcid.org/0000-0001-5417-5939
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Publikasjoner (10 av 51) Visa alla publikasjoner
Rakesh, K., Bjorsell, N., Gutierrez-Farewik, E. & Smith, C. (2019). A survey of human shoulder functional kinematic representations. Medical and Biological Engineering and Computing, 57(2), 339-367
Åpne denne publikasjonen i ny fane eller vindu >>A survey of human shoulder functional kinematic representations
2019 (engelsk)Inngår i: Medical and Biological Engineering and Computing, ISSN 0140-0118, E-ISSN 1741-0444, Vol. 57, nr 2, s. 339-367Artikkel, forskningsoversikt (Fagfellevurdert) Published
Abstract [en]

In this survey, we review the field of human shoulder functional kinematic representations. The central question of this review is to evaluate whether the current approaches in shoulder kinematics can meet the high-reliability computational challenge. This challenge is posed by applications such as robot-assisted rehabilitation. Currently, the role of kinematic representations in such applications has been mostly overlooked. Therefore, we have systematically searched and summarised the existing literature on shoulder kinematics. The shoulder is an important functional joint, and its large range of motion (ROM) poses several mathematical and practical challenges. Frequently, in kinematic analysis, the role of the shoulder articulation is approximated to a ball-and-socket joint. Following the high-reliability computational challenge, our review challenges this inappropriate use of reductionism. Therefore, we propose that this challenge could be met by kinematic representations, that are redundant, that use an active interpretation and that emphasise on functional understanding.

sted, utgiver, år, opplag, sider
SPRINGER HEIDELBERG, 2019
Emneord
Kinematics, Robot-assisted rehabilitation, Human movement understanding, Human-robot interaction, Shoulder, MPSTER W T, 1965, Archives of physical medicine and rehabilitation, V46, P49 lsterlee Bart, 2014, MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING, V52, P283 hiele Andre, 2006, IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING, V14, P456 ibek Jason S., 2013, JOURNAL OF APPLIED BIOMECHANICS, V29, P609 rman Sigal, 2008, ROBOTICA, V26, P435 ren Alexandra, 2013, MANUAL THERAPY, V18, P473 adi Hippolite O., 2008, JOURNAL OF BIOMECHANICS, V41, P2144 cWilliams Bruce A., 2013, JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME, V135, yer Patrick J., 2008, JOURNAL OF ORTHOPAEDIC SCIENCE, V13, P359 Xu, 2013, EXPERIMENTAL BRAIN RESEARCH, V231, P249
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-244109 (URN)10.1007/s11517-018-1903-3 (DOI)000456747000001 ()30367391 (PubMedID)2-s2.0-85055874727 (Scopus ID)
Forskningsfinansiär
VINNOVA, AAL 2013-6-042
Merknad

QC 20190219

Tilgjengelig fra: 2019-02-19 Laget: 2019-02-19 Sist oppdatert: 2019-02-19bibliografisk kontrollert
Karimi, M. T., Gutierrez-Farewik, E. & McGarry, A. (2019). Evaluation of the hip joint contact force in subjects with Perthes based on OpenSIM. Medical Engineering and Physics, 67, 44-48
Åpne denne publikasjonen i ny fane eller vindu >>Evaluation of the hip joint contact force in subjects with Perthes based on OpenSIM
2019 (engelsk)Inngår i: Medical Engineering and Physics, ISSN 1350-4533, E-ISSN 1873-4030, Vol. 67, s. 44-48Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The head of femoral bone is deformed in the subjects with Leg Calve Perthes disease (LCPD). This may be due to the excessive loads applied on it. There are no studies that report the hip joint contact force in subjects with LCPD. Therefore, the aim of this study was to evaluate the hip joint contact force in subjects with Perthes disease. Ten typically-developing (TD) children and 10 children with LCPD were recruited in this study. The kinematics and kinetics of the subjects were evaluated in 3D motion analysis. The hip joint contact force was approximated using OpenSIM software. Differences were determined with an independent t-test. There was a significant difference between walking speed of TD and Perthes subjects (63.8 (±8.1) and 57.4 (±7.0) m/min, respectively). The first peak of hip joint contact force was 4.8 (±1.7) N/BW in Perthes subjects, compared to 7.6 (±2.5) N/BW in TD subjects (p = 0.004). The peak hip joint contact force in mediolateral and anteroposterior directions was significantly lower in Perthes subjects (p < 0.05). The hip joint excursion was 40.0 (±5.6) and 46.4 (±8.5) degrees in Perthes and normal subjects, respectively (p = 0.03). The hip joint contact forces were lower in the subjects with Perthes disease. Therefore, it can be concluded that the strategies used by LCPD subjects were successful to decrease hip joint contact force.

sted, utgiver, år, opplag, sider
Elsevier, 2019
Emneord
Gait, Hip joint contact force, OpenSIM
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-251506 (URN)10.1016/j.medengphy.2019.03.001 (DOI)2-s2.0-85062733490 (Scopus ID)
Merknad

QC 20190529

Tilgjengelig fra: 2019-05-14 Laget: 2019-05-14 Sist oppdatert: 2019-05-29bibliografisk kontrollert
Bartonek, A., Lidbeck, C., Hellgren, K. & Gutierrez-Farewik, E. (2019). Head and Trunk Movements During Turning Gait in Children with Cerebral Palsy. Journal of motor behavior, 51(4), 362-370
Åpne denne publikasjonen i ny fane eller vindu >>Head and Trunk Movements During Turning Gait in Children with Cerebral Palsy
2019 (engelsk)Inngår i: Journal of motor behavior, ISSN 0022-2895, E-ISSN 1940-1027, Vol. 51, nr 4, s. 362-370Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Thirty children with cerebral palsy (CP) and 22 typical developing (TD) were tested with 3D-gait analysis. At turning, trunk rotation was larger in CP2 (GMFCS II) than in TD and CP1 (GMFCS I), and head flexion was larger in CP3 (GMFCS III) than TD. Maximum head and trunk flexion values during the entire trial were larger in CP3 than in the other groups, and trunk flexion was larger in CP2 than in TD. Trial time increased with GMFCS-level. Less trunk rotation than TD and CP1 reflects spatial insecurity in CP2, which in CP3 is compensated by the walker. The flexed head and trunk in CP3 and trunk in CP2 may reflect deficits in proprioception and sensation requiring visual control of the lower limbs.

sted, utgiver, år, opplag, sider
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, 2019
Emneord
gait, perception, sensation, proprioception, spatial orientation
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-249758 (URN)10.1080/00222895.2018.1485009 (DOI)000463783100002 ()30325711 (PubMedID)2-s2.0-85055082682 (Scopus ID)
Merknad

QC 20190429

Tilgjengelig fra: 2019-04-29 Laget: 2019-04-29 Sist oppdatert: 2019-04-29bibliografisk kontrollert
Sandamas, P., Gutierrez-Farewik, E. & Arndt, A. (2019). The effect of a reduced first step width on starting block and first stance power and impulses during an athletic sprint start. Journal of Sports Sciences, 37(9), 1046-1054
Åpne denne publikasjonen i ny fane eller vindu >>The effect of a reduced first step width on starting block and first stance power and impulses during an athletic sprint start
2019 (engelsk)Inngår i: Journal of Sports Sciences, ISSN 0264-0414, E-ISSN 1466-447X, Vol. 37, nr 9, s. 1046-1054Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This study investigated how manipulating first step width affects 3D external force production, centre of mass (CoM) motion and performance in athletic sprinting. Eight male and 2 female competitive sprinters (100m PB: 11.03 +/- 0.36 s male and 11.6 +/- 0.45 s female) performed 10 maximal effort block starts. External force and three-dimensional kinematics were recorded in both the block and first stance phases. Five trials were performed with the athletes performing their preferred technique (Skating) and five trials with the athletes running inside a 0.3 m lane (Narrow). By reducing step width from a mean of 0.31 +/- 0.06 m (Skating) to 0.19 +/- 0.03 m (Narrow), reductions were found between the two styles in medial block and medial 1st stance impulses, 1st stance anterior toe-off velocity and mediolateral motion of the CoM. No differences were found in block time, step length, stance time, average net resultant force vector, net anteroposterior impulse nor normalised external power. Step width correlated positively with medial impulse but not with braking nor net anteroposterior impulse. Despite less medially directed forces and less mediolateral motion of the CoM in the Narrow trials, no immediate improvement to performance was found by restricting step width.

sted, utgiver, år, opplag, sider
TAYLOR & FRANCIS LTD, 2019
Emneord
Sprinting, foot placement, CoM motion, impulse, external power
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-249768 (URN)10.1080/02640414.2018.1541161 (DOI)000463112500011 ()30460879 (PubMedID)2-s2.0-85057296756 (Scopus ID)
Merknad

QC 20190429

Tilgjengelig fra: 2019-04-29 Laget: 2019-04-29 Sist oppdatert: 2019-04-29bibliografisk kontrollert
Rakesh, K., Cruciani, S., Gutierrez-Farewik, E., Björsell, N. & Smith, C. (2018). Reliably Segmenting Motion Reversals of a Rigid-IMU Cluster Using Screw-Based Invariants. In: : . Paper presented at IEEE-RAS 18th International Conference on Humanoid Robots (Humanoids) Beijing, China, November 6-9.
Åpne denne publikasjonen i ny fane eller vindu >>Reliably Segmenting Motion Reversals of a Rigid-IMU Cluster Using Screw-Based Invariants
Vise andre…
2018 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Human-robot interaction (HRI) is movingtowards the human-robot synchronization challenge. Inrobots like exoskeletons, this challenge translates to thereliable motion segmentation problem using wearabledevices. Therefore, our paper explores the possibility ofsegmenting the motion reversals of a rigid-IMU clusterusing screw-based invariants. Moreover, we evaluate thereliability of this framework with regard to the sensorplacement, speed and type of motion. Overall, our resultsshow that the screw-based invariants can reliably segmentthe motion reversals of a rigid-IMU cluster.

HSV kategori
Forskningsprogram
Datalogi
Identifikatorer
urn:nbn:se:kth:diva-241104 (URN)10.1109/HUMANOIDS.2018.8624969 (DOI)000458689700013 ()2-s2.0-85062299962 (Scopus ID)
Konferanse
IEEE-RAS 18th International Conference on Humanoid Robots (Humanoids) Beijing, China, November 6-9
Merknad

QC 20190111

Tilgjengelig fra: 2019-01-10 Laget: 2019-01-10 Sist oppdatert: 2019-04-11bibliografisk kontrollert
Löwing, K., Thews, K., Haglund-Åkerlind, Y. & Gutierrez-Farewik, E. M. (2017). Effects of Botulinum Toxin-A and Goal-Directed Physiotherapy in Children with Cerebral Palsy GMFCS Levels I & II. Physical & Occupational Therapy in Pediatrics, 37(3), 268-282
Åpne denne publikasjonen i ny fane eller vindu >>Effects of Botulinum Toxin-A and Goal-Directed Physiotherapy in Children with Cerebral Palsy GMFCS Levels I & II
2017 (engelsk)Inngår i: Physical & Occupational Therapy in Pediatrics, ISSN 0194-2638, E-ISSN 1541-3144, Vol. 37, nr 3, s. 268-282Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Aims: To evaluate short and long-term effects of botulinum toxin-A combined with goal-directed physiotherapy in children with cerebral palsy (CP). Method: A consecutive selection of 40 children, ages 4–12 years, diagnosed with unilateral or bilateral CP, and classified in GMFCS levels I–II. During the 24 months, 9 children received one BoNT-A injection, 10 children two injections, 11 children three injections, and 10 children received four injections. 3D gait analysis, goal-attainment scaling, and body function assessments were performed before and at 3, 12, and 24 months after initial injections. Results: A significant but clinically small long-term improvement in gait was observed. Plantarflexor spasticity was reduced after three months and remained stable, while passive ankle dorsiflexion increased after 3 months but decreased slightly after 12 months. Goal-attainment gradually increased, reached the highest levels at 12 months, and levels were maintained at 24 months. Conclusion: The treatments’ positive effect on spasticity reduction was identified, but did not relate to improvement in gait or goal-attainment. No long-term positive change in passive ankle dorsiflexion was observed. Goal attainment was achieved in all except four children. The clinical significance of the improved gait is unclear. Further studies are recommended to identify predictors for positive treatment outcome.

sted, utgiver, år, opplag, sider
Taylor & Francis Group, 2017
Emneord
cerebral palsy, Cohort study, gait and motor control, mobility
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-187085 (URN)10.3109/01942638.2016.1150384 (DOI)000399485400003 ()2-s2.0-84964034387 (Scopus ID)
Merknad

QC 20170602

Tilgjengelig fra: 2016-05-17 Laget: 2016-05-17 Sist oppdatert: 2017-06-02bibliografisk kontrollert
Yadav, P., Shefelbine, S. J., Ponten, E. & Gutierrez-Farewik, E. (2017). Influence of muscle groups' activation on proximal femoral growth tendency. Biomechanics and Modeling in Mechanobiology, 16(6), 1869-1883
Åpne denne publikasjonen i ny fane eller vindu >>Influence of muscle groups' activation on proximal femoral growth tendency
2017 (engelsk)Inngår i: Biomechanics and Modeling in Mechanobiology, ISSN 1617-7959, E-ISSN 1617-7940, Vol. 16, nr 6, s. 1869-1883Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Muscle and joint contact force influence stresses at the proximal growth plate of the femur and thus bone growth, affecting the neck shaft angle (NSA) and femoral anteversion (FA). This study aims to illustrate how different muscle groups' activation during gait affects NSA and FA development in able-bodied children. Subject-specific femur models were developed for three able-bodied children (ages 6, 7, and 11 years) using magnetic resonance images. Contributions of different muscle groups-hip flexors, hip extensors, hip adductors, hip abductors, and knee extensors-to overall hip contact force were computed. Specific growth rate for the growth plate was computed, and the growth was simulated in the principal stress direction at each element in the growth front. The predicted growth indicated decreased NSA and FA (of about over a four-month period) for able-bodied children. Hip abductors contributed the most, and hip adductors, the least, to growth rate. All muscles groups contributed to a decrease in predicted NSA (similar to 0.01 degrees-0.04 degrees and FA (similar to 0.004 degrees-0.2 degrees), except hip extensors and hip adductors, which showed a tendency to increase the FA (similar to 0.004 degrees-0.2 degrees). Understanding influences of different muscle groups on long bone growth tendency can help in treatment planning for growing children with affected gait.

sted, utgiver, år, opplag, sider
SPRINGER HEIDELBERG, 2017
Emneord
Bone tissue modeling, Deformity development, Biomechanics, Individualized, Finite element analysis, Osteogenic index
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-217928 (URN)10.1007/s10237-017-0925-3 (DOI)000414450200005 ()28639152 (PubMedID)2-s2.0-85021103382 (Scopus ID)
Merknad

QC 20171121

Tilgjengelig fra: 2017-11-21 Laget: 2017-11-21 Sist oppdatert: 2017-11-21bibliografisk kontrollert
Yadav, P., Shefelbine, S. J. & Gutierrez-Farewik, E. M. (2016). Effect of growth plate geometry and growth direction on prediction of proximal femoral morphology. Journal of Biomechanics, 49(9), 1613-1619
Åpne denne publikasjonen i ny fane eller vindu >>Effect of growth plate geometry and growth direction on prediction of proximal femoral morphology
2016 (engelsk)Inngår i: Journal of Biomechanics, ISSN 0021-9290, E-ISSN 1873-2380, Vol. 49, nr 9, s. 1613-1619Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Mechanical stimuli play a significant role in the process of endochondral growth. Thus far, approaches to understand the endochondral mechanical growth rate have been limited to the use of approximated location and geometry of the growth plate. Furthermore, growth has been simulated based on the average deflection of the growth plate or of the femoral neck. It has also been reported in the literature that the growth plate lies parallel to one of the principal stresses acting on it, to reduce the shear between epiphysis and diaphysis. Hence the current study objectives were (1) to evaluate the significance of a subject-specific finite element model of the femur and growth plate compared to a simplified growth plate model and (2) to explore the different growth direction models to better understand proximal femoral growth mechanisms. A subject-specific finite element model of an able-bodied 7-year old child was developed. The muscle forces and hip contact force were computed for one gait cycle and applied to a finite element model to determine the specific growth rate. Proximal femoral growth was simulated for two different growth direction models: femoral neck deflection direction and principal stress direction. The principal stress direction model captured the expected tendency for decreasing the neck shaft angle and femoral anteversion for both growth plate models. The results of this study suggest that the subject-specific geometry and consideration of the principal stress direction as growth direction may be a more realistic approach for correct prediction of proximal femoral growth morphology.

sted, utgiver, år, opplag, sider
Elsevier, 2016
Emneord
Deformity development, Specific growth rate, Octahedral shear stress, Hydrostatic stress, MRI
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-189665 (URN)10.1016/j.jbiomech.2016.03.039 (DOI)000377731200028 ()27063249 (PubMedID)2-s2.0-84973468416 (Scopus ID)
Merknad

QC 20160715

Tilgjengelig fra: 2016-07-15 Laget: 2016-07-11 Sist oppdatert: 2017-11-28bibliografisk kontrollert
Bartonek, A., Lidbeck, C. M. & Gutierrez-Farewik, E. (2016). Influence of external visual focus on gait in children with bilateral cerebral palsy. Pediatric Physical Therapy, 28(4), 393-399
Åpne denne publikasjonen i ny fane eller vindu >>Influence of external visual focus on gait in children with bilateral cerebral palsy
2016 (engelsk)Inngår i: Pediatric Physical Therapy, ISSN 0898-5669, E-ISSN 1538-005X, Vol. 28, nr 4, s. 393-399Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Purpose: To explore whether focusing a target influenced gait in children with cerebral palsy (CP) and typical development (TD). Methods: Thirty children with bilateral CP (Gross Motor Function Classification System [GMFCS] I-III) and 22 with TD looked at a light at walkway end (Gaze Target) while walking and returned (No Target). Results: During Gaze versus No Target, children with TD reduced temporal-spatial parameters and movements in the sagittal (SPM) and transverse planes. In comparison, during Gaze Target, children in CP1 (GMFCS I) had larger trunk SPM, children in CP2 (GMFCS II) larger neck (SPM), and children in CP3 (GMFCS III) greater head and neck frontal plane movements, and reduced cadence and single support. Conclusions: Focusing a target altered gait in children with CP. Children in CP1 reduced movements similar to children with TD, children in CP2 behaved nearly unchanged, whereas children in CP3 reduced movements and temporalspatial parameters, potentially as a consequence of lack of sensory information from lower limbs.

HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-195295 (URN)10.1097/PEP.0000000000000282 (DOI)000390363000012 ()2-s2.0-84978720985 (Scopus ID)
Merknad

QC 20161110

Tilgjengelig fra: 2016-11-10 Laget: 2016-11-02 Sist oppdatert: 2017-11-29bibliografisk kontrollert
Dijkstra, E. J. & Gutierrez-Farewik, E. M. (2015). Computation of ground reaction force using Zero Moment Point. Journal of Biomechanics, 48(14), 3776-3781
Åpne denne publikasjonen i ny fane eller vindu >>Computation of ground reaction force using Zero Moment Point
2015 (engelsk)Inngår i: Journal of Biomechanics, ISSN 0021-9290, E-ISSN 1873-2380, Vol. 48, nr 14, s. 3776-3781Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Motion analysis is a common clinical assessment and research tool that uses a camera system or motion sensors and force plates to collect kinematic and kinetic information of a subject performing an activity of interest. The use of force plates can be challenging and sometimes even impossible. Over the past decade, several computational methods have been developed that aim to preclude the use of force plates. Useful in particular for predictive simulations, where a new motion or change in control strategy inherently means different external contact loads. These methods, however, often depend on prior knowledge of common observed ground reaction force (GRF) patterns, are computationally expensive, or difficult to implement. In this study, we evaluated the use of the Zero Moment Point as a computationally inexpensive tool to obtain the GRFs for normal human gait. The method was applied on ten healthy subjects walking in a motion analysis laboratory and predicted GRFs are evaluated against the simultaneously measured force plate data. Apart from the antero-posterior forces, GRFs are well-predicted and errors fall within the error ranges from other published methods. Joint extension moments were underestimated at the ankle and hip but overestimated at the knee, attributable to the observed discrepancy in the predicted application points of the GRFs. The computationally inexpensive method evaluated in this study can reasonably well predict the GRFs for normal human gait without using prior knowledge of common gait kinetics.

sted, utgiver, år, opplag, sider
Elsevier, 2015
Emneord
Prediction, Inverse dynamics, Forward dynamics, Gait
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-180136 (URN)10.1016/j.jbiomech.2015.08.027 (DOI)000366064000006 ()26482731 (PubMedID)2-s2.0-84947093227 (Scopus ID)
Merknad

QC 20160113

Tilgjengelig fra: 2016-01-13 Laget: 2016-01-07 Sist oppdatert: 2017-11-30bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-5417-5939