Base de dados : MEDLINE
Pesquisa : A01.923 [Categoria DeCS]
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[PMID]:29192885
[Au] Autor:Xie Q; Zeng D; Zhao Q; Meng D; Xu Z; Liang Z; Ma J
[Ti] Título:Robust Low-Dose CT Sinogram Preprocessing via Exploiting Noise-Generating Mechanism.
[So] Source:IEEE Trans Med Imaging;36(12):2487-2498, 2017 Dec.
[Is] ISSN:1558-254X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Computed tomography (CT) image recovery from low-mAs acquisitions without adequate treatment is always severely degraded due to a number of physical factors. In this paper, we formulate the low-dose CT sinogram preprocessing as a standard maximum a posteriori (MAP) estimation, which takes full consideration of the statistical properties of the two intrinsic noise sources in low-dose CT, i.e., the X-ray photon statistics and the electronic noise background. In addition, instead of using a general image prior as found in the traditional sinogram recovery models, we design a new prior formulation to more rationally encode the piecewise-linear configurations underlying a sinogram than previously used ones, like the TV prior term. As compared with the previous methods, especially the MAP-based ones, both the likelihood/loss and prior/regularization terms in the proposed model are ameliorated in a more accurate manner and better comply with the statistical essence of the generation mechanism of a practical sinogram. We further construct an efficient alternating direction method of multipliers algorithm to solve the proposed MAP framework. Experiments on simulated and real low-dose CT data demonstrate the superiority of the proposed method according to both visual inspection and comprehensive quantitative performance evaluation.
[Mh] Termos MeSH primário: Processamento de Imagem Assistida por Computador/métodos
Tomografia Computadorizada por Raios X/métodos
[Mh] Termos MeSH secundário: Algoritmos
Animais
Feminino
Seres Humanos
Imagens de Fantasmas
Dose de Radiação
Razão Sinal-Ruído
Suínos
Tronco/diagnóstico por imagem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171202
[St] Status:MEDLINE
[do] DOI:10.1109/TMI.2017.2767290


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[PMID]:28357922
[Au] Autor:Juan-Recio C; López-Plaza D; Barbado Murillo D; García-Vaquero MP; Vera-García FJ
[Ad] Endereço:a Sport Research Centre , Miguel Hernández University of Elche , Elche (Alicante) , Spain.
[Ti] Título:Reliability assessment and correlation analysis of 3 protocols to measure trunk muscle strength and endurance.
[So] Source:J Sports Sci;36(4):357-364, 2018 Feb.
[Is] ISSN:1466-447X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Different methods have been developed to quantify trunk muscle strength and endurance. However, some important protocol characteristics are still unclear, hindering the selection of the most suitable tests in each specific situation. The aim of this study was to examine the reliability and the relationship between 3 representative tests of the most common type of protocols used to assess trunk muscle strength and endurance. Twenty-seven healthy men performed each test twice spaced 1 month apart.Trunk strength and endurance were evaluated with an isokinetic dynamometer and 2 field tests including Biering-Sørensen test and Flexion-rotation trunk test. All tests showed a good relative consistency (intraclass correlation coefficient [ICC]> 0.75), except for the isokinetic endurance variables which had low-moderate reliability (0.37 < ICC > 0.65). Absolute reliability seemed slightly better in the isokinetic protocol than in the field tests, which showed about 12% of test-retest score increase. No significant correlations were found between test scores. After a familiarisation period for the field tests, the 3 protocols can be used to obtain reliable measures of trunk muscle strength and endurance. Based on the correlation analysis, these measures are not related, which highlights the importance of selecting the most suitable trunk test for each situation.
[Mh] Termos MeSH primário: Teste de Esforço/métodos
Dinamômetro de Força Muscular
Força Muscular/fisiologia
Resistência Física/fisiologia
Tronco/fisiologia
[Mh] Termos MeSH secundário: Adulto
Seres Humanos
Contração Isométrica/fisiologia
Masculino
Músculo Esquelético/fisiologia
Reprodutibilidade dos Testes
Rotação
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170331
[St] Status:MEDLINE
[do] DOI:10.1080/02640414.2017.1307439


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[PMID]:28281879
[Au] Autor:Jones B; Till K; Roe G; O'Hara J; Lees M; Barlow MJ; Hind K
[Ad] Endereço:a Institute for Sport, Physical Activity and Leisure , Leeds Beckett University , Leeds , UK.
[Ti] Título:Six-year body composition change in male elite senior rugby league players.
[So] Source:J Sports Sci;36(3):266-271, 2018 Feb.
[Is] ISSN:1466-447X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study investigated the change in body composition and bone mineral content (BMC) of senior rugby league (RL) players between 2008 and 2014. Twelve male professional RL players (age, 24.6 ± 4.0 years; stature, 183.4 ± 8.4 cm) received a dual-energy X-ray absorptiometry scan during preseason in 2008 and 2014. Between 2008 and 2014, very likely increases in leg lean mass (LM), total trunk and leg BMC, and a likely increase in arm BMC and possible increases in body mass (BM), total and trunk fat mass (FM), and total, trunk and arm LM were observed. Unlikely decreases and unclear changes in leg and arm FM were also found. Large negative correlations were observed between age and BM (r = -0.72), LM (r = -0.70), FM (r = -0.61) and BMC (r = -0.84) change. Three participants (19.1 ± 1.6 years) increased LM by 7.0-9.3 kg. Younger players had the largest increases in LM during this period, although an older player (30-year old) still increased LM. Differences in body composition change were also observed for participants of the same age, thus contextual factors should be considered. This study demonstrates the individuality of body composition changes in senior professional rugby players, while considering the potential change in young athletes.
[Mh] Termos MeSH primário: Composição Corporal/fisiologia
Densidade Óssea/fisiologia
Futebol Americano/fisiologia
[Mh] Termos MeSH secundário: Absorciometria de Fóton
Adulto
Fatores Etários
Braço/anatomia & histologia
Seres Humanos
Perna (Membro)/anatomia & histologia
Estudos Longitudinais
Masculino
Fatores de Tempo
Tronco/anatomia & histologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1080/02640414.2017.1300313


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[PMID]:27777135
[Au] Autor:Haddad J; Kalbacher E; Piccard M; Aubry S; Chaigneau L; Pauchot J
[Ad] Endereço:Service de chirurgie orthopédique, traumatologique et plastique, chirurgie de la main, CHU Jean-Minjoz, 1, boulevard Flemming, 25030 Besançon, France.
[Ti] Título:[Evaluation of the management of soft tissue sarcomas in Franche-Comté since the establishment of a multidisciplinary meeting at University Hospital. About 47 cases].
[Ti] Título:Évaluation de la prise en charge des sarcomes des tissus mous en Franche-Comté depuis l'instauration d'une réunion de concertation pluridisciplinaire au CHRU. À propos de 47 cas..
[So] Source:Ann Chir Plast Esthet;62(1):15-22, 2017 Feb.
[Is] ISSN:1768-319X
[Cp] País de publicação:France
[La] Idioma:fre
[Ab] Resumo:GOALS OF STUDY: A multidisciplinary meeting (RCP) dedicated to the treatment of sarcoma was established in Franche-Comte in 2010. The goals of the study are: (a) To evaluate the treatment of sarcomas by confrontation with the existing literature; (b) To evaluate the influence of the multidisciplinary meeting on the management of sarcomas by hospitals at the regional level. MATERIALS AND METHODS: This is a retrospective single center study from 2010 to 2015 on patients with sarcoma and peripheral soft tissue drawn from a Netsarc database (National Network of sarcomas) and communicating cancer record. A database Cleanweb especially dedicated is created. RESULTS: Forty-seven patients were included: ten sarcomas at the upper member 26 to the lower limbs, 11 on the trunk. Forty patients were operated on: ten out of the university hospital, 28 at the university hospital and two in a coordinating center. Ninety percent of patients treated at the university hospital were in accordance with the recommandations. None of the patients operated out of the university hospital benefited from medical care in accordance to the recommendations. There is an increase in the number of files sent by the hospitals out of the university hospital discussed in multidisciplinary meeting, before treatment. CONCLUSION: The creation of a dedicated multidisciplinary meeting sarcoma improves the medical management of these tumors and decreases inappropriate medical managements thanks to a better education of the regional physicians.
[Mh] Termos MeSH primário: Comunicação Interdisciplinar
Sarcoma/cirurgia
Neoplasias de Tecidos Moles/cirurgia
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Extremidades/patologia
Feminino
França
Hospitais Universitários
Seres Humanos
Masculino
Meia-Idade
Estudos Retrospectivos
Sarcoma/patologia
Neoplasias de Tecidos Moles/patologia
Tronco/patologia
Resultado do Tratamento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180206
[Lr] Data última revisão:
180206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE


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[PMID]:28461129
[Au] Autor:Boucher JA; Roy N; Preuss R; Larivière C
[Ad] Endereço:School of Rehabilitation, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada; Occupational Health and Safety Research Institute Robert-Sauvé (IRSST), 505, boulevard de Maisonneuve-O., Montréal, QC, H3A 3C2, Canada. Electronic address: charljea@uqtr.ca.
[Ti] Título:The effect of two lumbar belt designs on trunk repositioning sense in people with and without low back pain.
[So] Source:Ann Phys Rehabil Med;60(5):306-311, 2017 Sep.
[Is] ISSN:1877-0665
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: Low back pain (LBP) has previously been associated with impaired lumbar proprioception, which may lead to and/or perpetuate joint instability as a cause of LBP. Wearing a lumbar belt (LB) may be beneficial in this regard. The primary aim was to determine the effect of 2 LB designs (extensible and non-extensible) on trunk repositioning sense in people with and without LBP. A secondary aim was to evaluate whether patients showing different clinical signs of lumbar instability differentially benefit from LBs in terms of lumbar proprioception. DESIGN: Within-group experimental study with a healthy control group. METHODS: In total, 38 patients with LBP and 19 healthy controls participated in this study. Lumbar proprioception (position sense) was measured with participants sitting in a device that allowed for generating movements in axial rotation. Three experimental conditions were compared: (1) no LB, (2) extensible LB, (3) non-extensible LB. Four repositioning errors were computed for each experimental condition: constant error (CE), absolute error (AE), variable error (VE) and total variability (E). RESULTS: CE and AE scores were higher for LBP patients than healthy controls (all P<0.001), but scores did not significantly differ by condition. Additional subgroup analyses of clinical signs of instability were inconclusive, showing the same results in LBP patients with low and high instability scores (all P<0.001). CONCLUSIONS: This study confirms a significant loss of proprioception in trunk axial rotation in patients with LBP. Wearing an LB did not improve proprioception, but the contact between the LB and the skin might depend on the movement direction. Future studies should investigate the 3 planes of motion while eliminating the effect of the vestibular system.
[Mh] Termos MeSH primário: Desenho de Equipamento/psicologia
Instabilidade Articular/reabilitação
Dor Lombar/reabilitação
Dispositivos de Fixação Ortopédica
Propriocepção
[Mh] Termos MeSH secundário: Adulto
Feminino
Seres Humanos
Instabilidade Articular/fisiopatologia
Instabilidade Articular/psicologia
Dor Lombar/fisiopatologia
Dor Lombar/psicologia
Vértebras Lombares/fisiopatologia
Masculino
Meia-Idade
Movimento
Postura
Tronco/fisiopatologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180205
[Lr] Data última revisão:
180205
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE


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[PMID]:28594247
[Au] Autor:Juste-Lorente O; Maza M; Lorente AI; Lopez-Valdes FJ
[Ad] Endereço:a Impact Laboratory-Aragon Institute for Engineering Research (I3A) , University of Zaragoza , Alcañiz, Teruel , Spain.
[Ti] Título:Differences in the kinematics of booster-seated pediatric occupants using two different car seats.
[So] Source:Traffic Inj Prev;19(1):18-22, 2018 01 02.
[Is] ISSN:1538-957X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: The objective of this article is to compare the performance of forward-facing child restraint systems (CRS) mounted on 2 different seats. METHODS: Two different anthropomorphic test device (ATD) sizes (P3 and P6), using the same child restraint system (a non-ISOFIX high-back booster seat), were exposed to the ECE R44 regulatory deceleration pulse in a deceleration sled. Two different seats (seat A, seat B) were used. Three repetitions per ATD and mounting seat were done, resulting in a total of 12 sled crashes. Dummy sensors measured the head tri-axial acceleration and angular rate and the thorax tri-axial acceleration, all acquired at 10,000 Hz. A high-speed video camera recorded the impact at 1,000 frames per second. The 3D kinematics of the head and torso of the ATDs were captured using a high-speed motion capture system (1,000 Hz). A pair-matched statistical analysis compared the outcomes of the tests using the 2 different seats. RESULTS: Statistically significant differences in the kinematic response of the ATDs associated with the type of seat were observed. The maximum 3 ms peak of the resultant head acceleration was higher on seat A for the P3 dummy (54.5 ± 1.9 g vs. 44.2 ± 0.5 g; P =.012) and for the P6 dummy (56.0 ± 0.8 g vs. 51.7 ± 1.2 g; P =.015). The peak belt force was higher on seat A than on seat B for the P3 dummy (5,488.0 ± 198.0 N vs. 4,160.6 ± 63.6 N; P =.008) and for the P6 dummy (7,014.0 ± 271.0 N vs. 5,719.3 ± 37.4 N; P =.015). The trajectory of the ATD head was different between the 2 seats in the sagittal, transverse, and frontal planes. CONCLUSION: The results suggest that the overall response of the booster-seated occupant exposed to the same impact conditions was different depending on the seat used regardless of the size of the ATD. The differences observed in the response of the occupants between the 2 seats can be attributed to the differences in cushion stiffness, seat pan geometry, and belt geometry. However, these results were obtained for 2 particular seat models and a specific CRS and therefore cannot be directly extrapolated to the generality of vehicle seats and CRS.
[Mh] Termos MeSH primário: Acidentes de Trânsito/estatística & dados numéricos
Sistemas de Proteção para Crianças/estatística & dados numéricos
Cabeça/fisiologia
Tronco/fisiologia
[Mh] Termos MeSH secundário: Aceleração
Fenômenos Biomecânicos
Criança
Pré-Escolar
Desaceleração
Desenho de Equipamento
Seres Humanos
Manequins
Tórax/fisiologia
Gravação de Videoteipe
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180202
[Lr] Data última revisão:
180202
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170609
[St] Status:MEDLINE
[do] DOI:10.1080/15389588.2017.1334119


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[PMID]:28456333
[Au] Autor:Resende RA; Kirkwood RN; Rudan JF; Deluzio KJ
[Ad] Endereço:Universidade Federal de Minas Gerais, School of Physical Education, Physical Therapy and Occupational Therapy, Department of Physical Therapy, Avenida Antônio Carlos 6627 Campus Pampulha, Pampulha, 31270-901 Belo Horizonte, MG, Brazil. Electronic address: renan.aresende@gmail.com.
[Ti] Título:How symmetric are metal-on-metal hip resurfacing patients during gait? Insights for the rehabilitation.
[So] Source:J Biomech;58:37-44, 2017 06 14.
[Is] ISSN:1873-2380
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Metal-on-metal hip resurfacing patients demonstrate hip biomechanics closer to normal in comparison to total hip arthroplasty during gait. However, it is not clear how symmetric is the gait of hip resurfacing patients. Biomechanical data of 12 unilateral metal-on-metal hip resurfacing participants were collected during gait at a mean time of 45months (SD 24) after surgery. Ankle, knee, hip, pelvis and trunk kinematics and kinetics of both sides were measured with a motion and force-capture system. Principal component analysis and mean hypothesis' tests were used to compare the operated and healthy sides. The operated side had prolonged ankle eversion angle during late stance and delayed increased ankle inversion angle during early swing (p=0.008; effect size=0.70), increased ankle inversion moment during late stance (p=0.001; effect size=0.78), increased knee adduction angle during swing (p=0.044; effect size=0.57), decreased knee abduction moment during stance (p=0.05; effect size=0.40), decreased hip range of motion in the sagittal plane (p=0.046; effect size=0.56), decreased range of hip abduction moment during stance (p=0.02; effect size=0.63), increased hip range of motion in the transverse plane (p=0.02; effect size=0.62), decreased hip internal rotation moment during the transition from loading response to midstance (p=0.001; effect size=0.81) and increased trunk ipsilateral lean (p=0.03; effect size=0.60). Therefore, hip resurfacing patients have some degree of asymmetry in long term, which may be related to hip weakness and decreased range of motion, to foot misalignments and to strategies implemented to reduce loading on the operated hip. Interventions such as muscle strengthening and stretching, insoles and gait feedback training may help improving symmetry following hip resurfacing.
[Mh] Termos MeSH primário: Artroplastia de Quadril
Marcha/fisiologia
Próteses Articulares Metal-Metal
[Mh] Termos MeSH secundário: Idoso
Articulação do Tornozelo/fisiologia
Fenômenos Biomecânicos
Feminino
Articulação do Quadril/fisiologia
Articulação do Quadril/cirurgia
Seres Humanos
Articulação do Joelho/fisiologia
Masculino
Meia-Idade
Amplitude de Movimento Articular/fisiologia
Rotação
Tronco/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180120
[Lr] Data última revisão:
180120
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170501
[St] Status:MEDLINE


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[PMID]:28460239
[Au] Autor:Walaszek MC; Ransom AL; Capehart S; Pohl MB; Shapiro R; Bollinger LM
[Ad] Endereço:Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, KY, United States.
[Ti] Título:External loading alters trunk kinematics and lower extremity muscle activity in a distribution-specific manner during sitting and rising from a chair.
[So] Source:J Electromyogr Kinesiol;34:102-108, 2017 Jun.
[Is] ISSN:1873-5711
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Excess body mass alters gait biomechanics in a distribution-specific manner. The effects of adding mass centrally or peripherally on biomechanics during sitting and rising from a chair are unknown. METHODS: Motion analysis and lower extremity EMG were measured for fifteen healthy, normal weight subjects during sit-to-stand (SitTS) and stand-to-sit (StandTS) from a chair under unloaded (UN), centrally loaded (CL), and peripherally loaded (PL) conditions. RESULTS: Compared to UN, PL significantly increased support width (SitTS and StandTS), increased peak trunk flexion velocity (SitTS), and trended to increase peak trunk flexion angle (SitTS). During StandTS, CL significantly reduced peak trunk flexion compared to UN and PL. EMG activity of the semitendinosus, vastus lateralis and/or medialis was significantly increased in CL compared to UN during SitTS and StandTS. CONCLUSIONS: Adding mass centrally or peripherally induces contrasting biomechanical strategies to successfully sit or rise from a chair. CL limits trunk flexion and increases knee extensor muscle activity whereas; PL increases support width and trunk flexion, thus preventing increased EMG activity.
[Mh] Termos MeSH primário: Extremidade Inferior/fisiologia
Movimento
Músculo Esquelético/fisiologia
Postura
Tronco/fisiologia
Suporte de Carga
[Mh] Termos MeSH secundário: Adulto
Fenômenos Biomecânicos
Feminino
Seres Humanos
Articulação do Joelho/fisiologia
Masculino
Equilíbrio Postural
Amplitude de Movimento Articular
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171207
[Lr] Data última revisão:
171207
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE


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[PMID]:29040298
[Au] Autor:Taniguchi M; Tateuchi H; Ibuki S; Ichihashi N
[Ad] Endereço:Division of Physical Therapy, Rehabilitation Units, Shiga University of Medical Science Hospital, Otsu, Shiga, Japan.
[Ti] Título:Relative mobility of the pelvis and spine during trunk axial rotation in chronic low back pain patients: A case-control study.
[So] Source:PLoS One;12(10):e0186369, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Trunk axial rotation is a risk factor for chronic low back pain (CLBP). The characteristics of rotational mobility in the pelvis and spine among CLBP patients are not fully understood. PURPOSE: The purpose of this study was to examine three-dimensional kinematic changes, and to compare the differences of rotational mobility and coupled motion, in patients with and without CLBP. METHODS: Fifteen patients with CLBP and 15 age and sex matched healthy subjects participated in this study. Each subject performed trunk rotation to maximum range of motion (ROM) in a standing position. The kinematics data was collected using a three-dimensional motion analysis system. The outcomes measured were the rotational ROM and the spine/pelvis ratio (SPR) in transvers plane at both maximum and 50% rotation position. The coupled angles in sagittal and frontal planes were also measured. RESULTS: No significant differences in rotational ROM of the thorax, pelvis, and spine were observed between two groups at maximum rotation position. However, there was a significant interaction between groups and rotational ROM of pelvis and spine (F = 4.57, p = 0.04), and the SPR in CLBP patients was significantly greater than that of the healthy subjects (CLBP; 0.50 ± 0.10 Control; 0.41 ± 0.12, p = 0.04). The results at 50% rotation position were similar to that at maximum rotation. This indicates a relative increase in spinal rotation in the CLBP patients during trunk rotation. Moreover, the CLBP patients exhibited a significantly higher anterior tilt of the pelvis and extension of the spine in the sagittal plane coupled with rotation. CONCLUSIONS: CLBP patients had relative hyper rotational mobility of the spine as well as excessive spinal extension coupled with trunk rotation. These results suggest that uncoordinated trunk rotation might be a functional failure associated with CLBP.
[Mh] Termos MeSH primário: Dor Lombar/fisiopatologia
Pelve/fisiopatologia
Coluna Vertebral/fisiopatologia
Estresse Mecânico
[Mh] Termos MeSH secundário: Adulto
Estudos de Casos e Controles
Feminino
Seres Humanos
Masculino
Postura
Amplitude de Movimento Articular/fisiologia
Rotação
Tronco/fisiopatologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171018
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186369


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[PMID]:28859201
[Au] Autor:Paul SS; Dibble LE; Walther RG; Shelton C; Gurgel RK; Lester ME
[Ad] Endereço:Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City.
[Ti] Título:Characterization of Head-Trunk Coordination Deficits After Unilateral Vestibular Hypofunction Using Wearable Sensors.
[So] Source:JAMA Otolaryngol Head Neck Surg;143(10):1008-1014, 2017 Oct 01.
[Is] ISSN:2168-619X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Importance: Individuals with vestibular hypofunction acutely restrict head motion to reduce symptoms of dizziness and nausea. This restriction results in abnormal decoupling of head motion from trunk motion, but the character, magnitude, and persistence of these deficits are unclear. Objective: To use wearable inertial sensors to quantify the extent of head and trunk kinematic abnormalities in the subacute stage after resection of vestibular schwannoma (VS) and the particular areas of deficit in head-trunk motion. Design, Setting, and Participants: This cross-sectional observational study included a convenience sample of 20 healthy adults without vestibular impairment and a referred sample of 14 adults 4 to 8 weeks after resection of a unilateral VS at a university and a university hospital outpatient clinic. Data were collected from November 12, 2015, through November 17, 2016. Exposures: Functional gait activities requiring angular head movements, including items from the Functional Gait Assessment (FGA; range, 1-30, with higher scores indicating better performance), the Timed Up & Go test (TUG; measured in seconds), and a 2-minute walk test (2MWT; measured in meters). Main Outcomes and Measures: Primary outcomes included peak head rotation amplitude (in degrees), peak head rotation velocity (in degrees per second), and percentage of head-trunk coupling. Secondary outcomes were activity and participation measures including gait speed, FGA score, TUG time, 2MWT distance, and the Dizziness Handicap Inventory score (range, 0-100, with higher scores indicating worse performance). Results: A total of 34 participants (14 men and 20 women; mean [SD] age, 39.3 [13.6] years) were included. Compared with the 20 healthy participants, the 14 individuals with vestibular hypofunction demonstrated mean (SD) reduced head turn amplitude (84.1° [15.5°] vs 113.2° [24.4°] for FGA-3), reduced head turn velocities (195.0°/s [75.9°/s] vs 358.9°/s [112.5°/s] for FGA-3), and increased head-trunk coupling (15.1% [6.5%] vs 5.9% [5.8%] for FGA-3) during gait tasks requiring angular head movements. Secondary outcomes were also worse in individuals after VS resection compared with healthy individuals, including gait speed (1.09 [0.27] m/s vs 1.47 [0.22] m/s), FGA score (20.5 [3.6] vs 30.0 [0.2]), TUG time (10.9 [1.7] s vs 7.1 [0.8] s), 2MWT (164.8 [37.6] m vs 222.6 [26.8] m), and Dizziness Handicap Inventory score (35.4 [20.7] vs 0.1 [0.4]). Conclusions and Relevance: With use of wearable sensors, deficits in head-trunk kinematics were characterized along with a spectrum of disability in individuals in the subacute stage after VS surgery compared with healthy individuals. Future research is needed to fully understand how patterns of exposure to head-on-trunk movements influence the trajectory of recovery of head-trunk coordination during community mobility.
[Mh] Termos MeSH primário: Movimentos da Cabeça/fisiologia
Monitorização Fisiológica/instrumentação
Atividade Motora/fisiologia
Neuroma Acústico/fisiopatologia
Tronco/fisiologia
Doenças Vestibulares/fisiopatologia
[Mh] Termos MeSH secundário: Adulto
Estudos de Casos e Controles
Estudos Transversais
Feminino
Marcha/fisiologia
Seres Humanos
Masculino
Meia-Idade
Neuroma Acústico/complicações
Neuroma Acústico/cirurgia
Equilíbrio Postural/fisiologia
Doenças Vestibulares/etiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170901
[St] Status:MEDLINE
[do] DOI:10.1001/jamaoto.2017.1443



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