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posterior center of pressure

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https://www.readbyqxmd.com/read/27933108/postural-orientation-and-equilibrium-processes-associated-with-increased-postural-sway-in-autism-spectrum-disorder-asd
#1
Zheng Wang, Rami R Hallac, Kaitlin C Conroy, Stormi P White, Alex A Kane, Amy L Collinsworth, John A Sweeney, Matthew W Mosconi
BACKGROUND: Increased postural sway has been repeatedly documented in children with autism spectrum disorder (ASD). Characterizing the control processes underlying this deficit, including postural orientation and equilibrium, may provide key insights into neurophysiological mechanisms associated with ASD. Postural orientation refers to children's ability to actively align their trunk and head with respect to their base of support, while postural equilibrium is an active process whereby children coordinate ankle dorsi-/plantar-flexion and hip abduction/adduction movements to stabilize their upper body...
2016: Journal of Neurodevelopmental Disorders
https://www.readbyqxmd.com/read/27914310/electrical-potentials-measured-on-the-surface-of-the-knee-reflect-the-changes-of-the-contact-force-in-the-knee-joint-produced-by-postural-sway
#2
Lin Zhu, Martin Garon, Éric Quenneville, Michael D Buschmann, Pierre Savard
Electroarthrography (EAG) is a novel technique for recording potentials on the knee surface that are generated by the compression of articular cartilage and that reflect both compression force and cartilage quality. The mechanical loading of the knee is achieved by transferring the subject's body weight from a bipedal stance to a unipedal stance. We hypothesized that EAG potentials change with postural sway. The study was performed on 20 normal subjects (10 male, 10 female; age 29±10.5 yrs.; mass 68.8±14...
October 18, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27888694/head-movement-measurement-an-alternative-method-for-posturography-studies
#3
REVIEW
L F Ciria, M A Muñoz, J Gea, N Peña, J G V Miranda, P Montoya, J Vila
The present study evaluated the measurement of head movements as a valid method for postural emotional studies using the comparison of simultaneous recording of center of pressure (COP) sway as criterion. Thirty female students viewed a set of 12 pleasant, 12 unpleasant and 12 neutral pictures from the International Affective Picture System, repeated twice, using a block presentation procedure while standing on a force platform (AMTI AccuSway). Head movements were recorded using a webcam (©KPC139E) located in the ceiling in line with the force platform and a light-emitting diode (LED) placed on the top of the head...
November 17, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27867519/force-plate-analyses-of-balance-following-a-balance-exercise-program-during-acute-post-operative-phase-in-individuals-with-total-hip-and-knee-arthroplasty-a-randomized-clinical-trial
#4
Pankaj Jogi, Aleksandra Zecevic, Tom J Overend, Sandi J Spaulding, John F Kramer
OBJECTIVES: Typical rehabilitation programs following total hip arthroplasty and total knee arthroplasty include joint range of motion and muscle-strengthening exercises. Balance and balance exercises following total hip arthroplasty and total knee arthroplasty have not received much attention. The purpose of this study was to determine whether an intervention of balance exercises added to a typical rehabilitation program positively affects patients' balance. METHODS: A total of 63 patients were provided with outpatient physical therapy at their home...
2016: SAGE Open Medicine
https://www.readbyqxmd.com/read/27858700/three-months-of-resistance-training-in-overweight-and-obese-individuals-improves-reactive-balance-control-under-unstable-conditions
#5
Erika Zemková, Ol'a Kyselovičová, Michal Jeleň, Zuzana Kováčiková, Gábor Ollé, Gabriela Řtefániková, Tomáš Vilman, Miroslav Baláž, Timea Kurdiová, Jozef Ukropec, Barbara Ukropcová
BACKGROUND: Contrary to static and dynamic balance, there is a lack of scientific evidence on the training induced changes in reactive balance control in response to unexpected perturbations in overweight and obese individuals. OBJECTIVE: This study evaluates the effect of 3 months of resistance and aerobic training programs on postural responses to unexpected perturbations under stable and unstable conditions in the overweight and obese. METHODS: A group of 17 overweight and obese subjects, divided into two groups, underwent either resistance or aerobic training for a period of 3 months (3 sessions per week)...
November 11, 2016: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/27852401/-distribution-and-compensation-mechanism-of-aberrations-between-anterior-and-posterior-surface-of-the-cornea-in-myopia-and-myopic-astigmatism-eyes
#6
X J Li, Y Wang, Y N Wu, W J Wu, C J Yu, L L Xu
Objective: To study the compensation mechanism of aberrations between anterior and posterior corneal surface, and to investigate the correlations between corneal aberrations and K values, intraocular pressure and central corneal thickness. Methods: One hundred and sixty-one subjects (300 eyes) with myopia and myopic astigmatism were recruited randomly. Corneal aberrations (anterior, posterior and total) in three different optical zones (2 mm, 4 mm, and 6 mm) centered on the corneal vertex were assessed with a corneal topographer (Sirius)...
November 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27847269/intrasylvian-intracerebral-hematomas-associated-with-ruptured-mca-aneurysms-a-single-center-series-and-a-review-of-literature
#7
Yupeng Zhang, Quan Hu, Hao Xue, Mingran Zhang, Jie Shen, Lin Deing, Qinglin Liu, Gang Li
OBJECTIVE: Ruptured MCA aneurysms usually lead to SAH,and several cases will represent concomitant intrasylvian or intracerebral hematomas. The objective of this paper was to compare the clinical and radiographic characteristics with their different outcomes. METHODS: The charts of 30 consecutive patients with ruptured MCA aneurysm related intracranial hematoma were retrospectively reviewed. These patients were dichotomized into ISH group and ICH group by the presence of intrahematomal contrast enhancing vessel (IHCEV), and for patients under open surgery, hematoma type was further confirmed by intraoperative observation...
November 12, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27845393/quantitative-analysis-of-upright-standing-in-adults-with-late-onset-pompe-disease
#8
Maria Stella Valle, Antonino Casabona, Agata Fiumara, Dora Castiglione, Giovanni Sorge, Matteo Cioni
Pompe disease is a rare disorder producing muscle weakness and progressive impairments in performing daily motor activities, such as walking and standing. Most studies have focused on dysfunctions at cellular level, restricting the examination of gross motor functions to qualitative or subjective rating scales evaluations. With the aim of providing an instrumented quantification of upright standing in Pompe disease, we used a force platform to measure the center of pressure over three foot positions and with eyes open and closed...
November 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27812748/relationship-between-changes-in-vestibular-sensory-reweighting-and-postural-control-complexity
#9
Brian L Cone, Daniel J Goble, Christopher K Rhea
Complexity measures have become increasingly prominent in the postural control literature. Several studies have found associations between clinical balance improvements and complexity, but the relationship between sensory reweighting and complexity changes has remained unobserved. The purpose of this study was to determine the relationship between sensory reweighting via Wii Fit balance training and complexity. Twenty healthy adults completed 6 weeks of training. Participants completed the sensory organization test (SOT) before and after the sessions...
November 3, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27804006/ramadan-fasting-effects-on-postural-control-in-the-elderly-a-comparison-between-fallers-and-non-fallers
#10
Rabeb Laatar, Rym Baccouch, Rihab Borji, Hiba Kachouri, Haithem Rebai, Sonia Sahli
Our purpose was to compare the effects of Ramadan fasting on postural control in elderly fallers and non-fallers. The protocol involved twenty-four healthy old volunteer males divided into two groups: fallers (mean age = 75.43 ± 5.26 years, weight = 67.25 ± 5.30 kg and height = 1.65 ± 0.02 m) and non-fallers (mean age = 72.3 ± 6.42 years, weight = 65.5 ± 6.15 kg and height = 1.64 ± 0.03 m). Participants performed a simple reaction time test (SRT) and a postural control protocol on four different occasions: one week before Ramadan (BR), during the second (SWR) and the fourth week (FWR) of Ramadan and three weeks after Ramadan (AR)...
November 1, 2016: Journal of Religion and Health
https://www.readbyqxmd.com/read/27770165/beyond-deficit-or-compensation-new-insights-on-postural-control-after-long-term-total-visual-loss
#11
Maitê M Russo, Thiago Lemos, Luís A Imbiriba, Nathalia L Ribeiro, Claudia D Vargas
Loss of vision is well known to affect postural control in blind subjects. This effect has classically been framed in terms of deficit or compensation depending on whether body sway increases or decreases in comparison with that of sighted subjects with the eyes open. However, studies have shown that postural responses can be modulated by the context and that changes in postural sway may not necessarily mean a worsened or improved postural control. The goal of our study was to test whether balance is affected by the context in blind subjects...
October 21, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27745875/discrete-sensors-distribution-for-accurate-plantar-pressure-analyses
#12
Laetitia Claverie, Anne Ille, Pierre Moretto
The aim of this study was to determine the distribution of discrete sensors under the footprint for accurate plantar pressure analyses. For this purpose, two different sensor layouts have been tested and compared, to determine which was the most accurate to monitor plantar pressure with wireless devices in research and/or clinical practice. Ten healthy volunteers participated in the study (age range: 23-58 years). The barycenter of pressures (BoP) determined from the plantar pressure system (W-inshoe®) was compared to the center of pressures (CoP) determined from a force platform (AMTI) in the medial-lateral (ML) and anterior-posterior (AP) directions...
October 10, 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27725798/holding-a-handle-for-balance-during-continuous-postural-perturbations-immediate-and-transitionary-effects-on-whole-body-posture
#13
Jernej Čamernik, Zrinka Potocanac, Luka Peternel, Jan Babič
When balance is exposed to perturbations, hand contacts are often used to assist postural control. We investigated the immediate and the transitionary effects of supportive hand contacts during continuous anteroposterior perturbations of stance by automated waist-pulls. Ten young adults were perturbed for 5 min and required to maintain balance by holding to a stationary, shoulder-high handle and following its removal. Center of pressure (COP) displacement, hip, knee and ankle angles, leg and trunk muscle activity and handle contact forces were acquired...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27693806/impaired-postural-control-in-children-with-developmental-coordination-disorder-is-related-to-less-efficient-central-as-well-as-peripheral-control
#14
Merete B Speedtsberg, Sofie B Christensen, Ken Kjøller Andersen, Jesper Bencke, Bente R Jensen, Derek J Curtis
BACKGROUND: Developmental coordination disorder (DCD) is a neurodevelopmental impairment that affects approximately 6% of children in primary school age. Children with DCD are characterized by impaired postural control. It has yet to be determined what effect peripheral and central neuromuscular control has on their balance control. OBJECTIVE: The aim of this study was to investigate the underlying mechanisms to impaired postural control in children with DCD using the rambling-trembling decomposition of the center of pressure (CoP)...
January 2017: Gait & Posture
https://www.readbyqxmd.com/read/27692993/-craniofacial-strategy-for-syndromic-craniosynostosis
#15
E Arnaud, G Paternoster, S James, M-P Morisseau-Durand, V Couloigner, P Diner, C Tomat, V Viot-Blanc, B Fauroux, V Cormier-Daire, G Baujat, M Robert, A Picard, S Antunez, R Khonsari, L Pamphile-Tabuteau, C Legros, M Zerah, P Meyer
The complexity of treatment of faciocraniosynostosis justifies the treatment in a reference center for rare diseases. The growth disturbances in the skull and face being variable according to the type of mutation in the FGFr (Crouzon, Pfeiffer, Apert), the strategy is adapted to the phenotype according to the following principles: posterior expansion with or without distraction around 6 months to limit the descent of the cerebellum tonsils and to prevent the turricephalic development; fronto-facial monobloc advancement with internal distraction around the age of 18 months in case of severe exorbitism or breathing impairment...
October 2016: Annales de Chirurgie Plastique et Esthétique
https://www.readbyqxmd.com/read/27676883/a-randomised-clinical-trial-comparing-a-new-bed-rails-and-lifting-pole-in-lying-sit-transfer-in-elderly-patients
#16
Emilie Viollet, Dominique Richard, Mylène Blot, Fabrice Nouvel
OBJECTIVE: A total of 27.6% of elderly people can not transfer from supine to sitting position. This driving plan consists on an anterior flexion and rotation of trunk to bring center of mass near the edge of bed. With ageing, we observe modifications like more requests of upper limbs and less turn side. The aim of this study is to compare influence of two assistive devices in the supine to sitting transfer: SAM, a new bed rails and the lifting pole. PATIENTS AND METHODS: Patients more than 65 years, after consent signature, were lying in a medical bed with lifting pole or SAM after randomisation...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676877/the-acute-effects-of-dynamic-and-static-stretching-on-the-knee-isokinetic-muscle-strength-and-balance-control-in-athletes
#17
Imen Fekhfekh, Abdelmoneem Yahia, Mokhtar Chaabene, Salma Jribi, Nizar Suissi, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: To study the acute effect of static and dynamic stretching on the knee muscle strength and postural capacity in athletes. PATIENTS AND METHODS: Fifteen judokas performed 2 stretching protocols (static and dynamic) on the muscles of both lower limbs with an interval of 48hours in a random order. An evaluation of the dominant knee muscle strength with an isokinetic dynamometer CybexNormII was performed before and after each stretching protocol in a concentric mode at a speed of 60 and 180°/s...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676826/correlations-between-isokinetic-knee-muscle-strength-postural-and-functional-parameters-in-knee-osteoarthritis-patients
#18
Abdelmoneem Yahia, Houcem Ksentini, Salma Jribi, Atika Mellek, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: The aim of the study was to investigate the relations between isokinetic muscle strength of the knee, postural profile and physical function in knee osteoarthritis patients. MATERIAL/PATIENTS AND METHODS: We included patients with advanced unilateral osteoarthritis (grades III or IV graded radiographically by Lawrence classification). We assessed functional impairment by the WOMAC score in its Arabic version, the strength of the knee muscles by isokinetic dynamometry and postural profile via the Satel(®) platform in bipodal and monopodal conditions in open and closed eyes...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676758/assessment-of-the-rocker-sole-shoes-on-postural-stability-in-patients-with-type-2-diabetes-and-distal-sensorimotor-polyneuropathy
#19
Marie Lumeau, Mathieu Lempereur, Emmanuel Sonnet, Olivier Remy Neris
OBJECTIVE: Distal sensorimotor polyneuropathy (DPN) is a leading risk factor of developing ulcer, including increased pressures at the forefoot. The rocker sole shoes are prescribed to decrease pressures but could induce instability [1]. The aim of this study was to compare the postural stability between normal shoes (NS) and rocker sole shoes (RSS) in patients with type 2 diabetes and DPN. MATERIAL/PATIENTS AND METHODS: In this preliminary, randomized, controlled study, NS and RSS were compared during static standing and gait...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676757/sensory-information-treatment-during-disturbed-standing-posture-in-chronic-acquired-demyelinating-polyneuropathies-cadp
#20
Clément Provost, Giulia Piccinini, Sophie Tasseel-Ponche, Pierre Lozeron, Bertrand Arnulf, Alain Yelnik
OBJECTIVE: As proposed after stroke, the study of reactions to a sensory stimulation allows to a better understanding of postural strategies. Below, we provide the analysis in chronic acquired demyelinating polyneuropathies (CADP). MATERIAL/PATIENTS AND METHODS: Prospective study of 25 healthy subjects (57±12years, 8M, 17F) and 25 CADP (66±14years, 20M, 5F) on stabilometric platform (Techno-Concept(®), France). Proprioception was disturbed by tendon vibration on Triceps Surae (TS) and Tibialis Anterior (TA)...
September 2016: Annals of Physical and Rehabilitation Medicine
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