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Academic literature on the topic 'FASTRAK; Movement'
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Journal articles on the topic "FASTRAK; Movement"
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Scott, I., A. Jariwala, L. Cochrane, G. Arnold, C. Wigderowitz, and R. Abboud. "Three dimensional measurement of wrist movement: adaptation and calibration of the Fastrak® system." Journal of Biomechanics 39 (January 2006): S79. http://dx.doi.org/10.1016/s0021-9290(06)83205-7.
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Sinha, Apurv, Muhammad A. Nazar, John Moorehead, Vijay Bhalaik, and Peter Brownson. "A Kinematic Assessment of Normal Elbow Movement in Activities of Modern Day Living." Shoulder & Elbow 2, no. 2 (April 2010): 118–23. http://dx.doi.org/10.1111/j.1758-5740.2010.00064.x.
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Background The range of functional elbow movement has previously been studied. The data obtained have been used to provide an objective basis for the determination of disability, to determine the optimum position for elbow splinting arthrodesis and to assist in the design of elbow prostheses. The present study aimed to evaluate the functional range of elbow movement as applied to a predetermined list of activities of daily living, which might be considered relevant to modern day life. This includes the use of computers and driving, which has not been studied earlier. Methods Twenty normal volunteers were studied and the range of elbow motion required for specific activities was recorded by means of a ‘Polhemus Fastrak’ magnetic tracking measurement system. The results obtained suggests that the functional range of elbow flexion is from 1.33° to 146.57° and the rotation arc is from 56° of pronation to 104° of supination. Conclusion This data compliments the work previously carried out, and defines the functional range of movement for some of the common activities of daily living.
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Kundra, RK, JD Moorehead, N. Barton-Hanson, and SC Montgomery. "Magnetic Tracking: A Novel Method of Assessing Anterior Cruciate Ligament Deficiency." Annals of The Royal College of Surgeons of England 88, no. 1 (January 2006): 16–17. http://dx.doi.org/10.1308/003588406x82934.
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INTRODUCTION The Lachman test is commonly performed as part of the routine assessment of patients with suspected anterior cruciate ligament (ACL) deficiency. A major drawback is its reliance on the clinician's subjective judgement of movement. The aim of this study was to quantify Lachman movement using a magnetic tracking device thereby providing a more accurate objective measure of movement. PATIENTS AND METHODS Ten patients aged 21–51 years were assessed as having unilateral ACL deficiency with conventional clinical tests. These patients were then re-assessed using a Polhemus Fastrak™ magnetic tracking device. RESULTS The mean anterior tibial displacement was 5.6 mm (SD = 2.5) for the normal knees and 10.2 mm (SD = 4.2) for the ACL-deficient knees. This gave an 82% increase in anterior tibial displacement for the ACL deficient knees. This was shown to be highly significant with P = 0.005. CONCLUSIONS The magnetic tracking system offers an objective quantification of displacements during the Lachman test. It is convenient, non-invasive and comfortable for the patient and is, therefore, ideally suited for use as an investigative tool.
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Kurosawa, Kenji, Takashi Watanabe, Ryoko Futami, Nozomu Hoshimiya, and Yasunobu Handa. "Development of a closed-loop fes system using a 3-d magnetic position and orientation measurement system." Journal of Automatic Control 12, no. 1 (2002): 23–30. http://dx.doi.org/10.2298/jac0201023k.
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We have developed a closed-loop FES system using a magnetic 3-D position and orientation measurement system (FASTRAK, Polhemus Inc). The purpose of this development was to resolve some experimental difficulties involved in our previous goniometer-based experimental system. The new system enabled us to perform FES control experiments on the multi-joint musculoskeletal system of the upper limbs including forearm pronation/supination. In this paper, we evaluated the system by some single-joint tracking tasks in order to compare its control performance with that of the previous system. Four muscles (ECRL(B), ECU, FCR, and FCU) of neurologically intact subjects were stimulated to control the wrist joint's two degrees of freedom movement. Stimulation currents were determined by a multi-channel PID controller that was designed for a musculoskeletal system with redundancy (i.e. the number of muscles stimulated is more than that of the degree-of-freedom of the movement). The results showed that the system had sufficient control performance on tracking desired trajectories. Moreover, the system could compensate for unwanted external disturbances.
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Becerro de Bengoa Vallejo, Ricardo, Rubén Sanchez Gómez, and Marta Elena Losa Iglesias. "Clinical improvement in functional hallux limitus using a cut-out orthosis." Prosthetics and Orthotics International 40, no. 2 (September 26, 2014): 215–23. http://dx.doi.org/10.1177/0309364614550262.
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Background: Functional hallux limitus (FHL) has been implicated in the development of metatarsophalangeal joint osteoarthritis. Objectives: To determine whether cut-out orthosis treatment increases plantarflexion of the first metatarsal by increasing its declination angle. Study design: Cross-sectional study. Methods: A total of 46 female volunteers with an average age of 25.66 ± 5.70 years (range: 19–42 years) and FHL participated in the study. We assessed the degrees of movement of the first metatarsal and proximal phalanx bones at the first metatarsophalangeal joint without and while wearing the cut-out orthosis using the 3Space Fastrak® via sensors. Results: The movement of the plantarflexión declination angle of the first metatarsal bone was higher using the orthosis 29.84° ± 5.98° versus without orthosis 27.69° ± 5.91° (p < 0.031°). Use of sandals may have minimized the magnitude of movement changes associated with orthosis versus non-orthosis use. Conclusion: The cut-out orthosis demonstrated a beneficial effect on non-fixed first metatarsophalangeal and metatarsal cuneiform joints affected by FHL, significantly increasing the declination of the metatarsal angle. Furthermore, use of the cut-out orthosis significantly reduced adduction movement of the first metatarsal bone in the transverse plane. Clinical relevance The cut-out orthosis demonstrated a beneficial effect on non-fixed first metatarsophalangeal and metatarsal cuneiform joints affected by FHL, significantly increasing the declination of the metatarsal angle. Furthermore, use of the cut-out orthosis significantly reduced adduction movement of the first metatarsal bone in the transverse plane.
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WIGDEROWITZ, C. A., I. SCOTT, A. JARIWALA, G. P. ARNOLD, and R. J. ABBOUD. "Adapting the Fastrak® System for Three-Dimensional Measurement of the Motion of the Wrist." Journal of Hand Surgery (European Volume) 32, no. 6 (December 2007): 700–704. http://dx.doi.org/10.1016/j.jhse.2007.06.019.
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The Polhemus Fastrak® short-range miniature transmitter and mini-receivers allow wrist motion to be measured continually in three dimensions, registering patterns of motion, which until now were difficult to quantify. The current study aimed to determine the applicability and repeatability of the Fastrak® system when assessing wrist movements during a set protocol of activities. The device was found to be easy to use and repeatable; the Fastrak® system showed a mean error of up to 3° in all movements tested. Its assessment of range of motion correlated with the results in the literature. The Fastrakv® system was suitable for continuous registration of movements during the performance of set tasks in either of the wrists. It has the potential to be used for documentation of wrist motion in clinics for various pathologies and for assessing outcomes in wrist surgeries.
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Adelstein, Bernard D., Eric R. Johnston, and Stephen R. Ellis. "Dynamic Response of Electromagnetic Spatial Displacement Trackers." Presence: Teleoperators and Virtual Environments 5, no. 3 (January 1996): 302–18. http://dx.doi.org/10.1162/pres.1996.5.3.302.
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Overall system latency—the elapsed time from input human motion until the immediate consequences of that input are available in the display—is one of the most frequently cited shortcoming of current virtual environment (VE) technology. Given that spatial displacement trackers are employed to monitor head and hand position and orientation in many VE applications, the dynamic response intrinsic to these devices is an unavoidable contributor to overall system latency. In this paper, we describe a testbed and method for measurement of tracker dynamic response that use a motorized rotary swing arm to sinusoidally displace the VE sensor at a number of frequencies spanning the bandwidth of volitional human movement. During the tests, actual swing arm angle and VE sensor reports are collected and time stamped. By calibrating the time stamping technique, the tracker's internal transduction and processing time are separated from data transfer and host computer software execution latencies. We have used this test-bed to examine several VE sensors—most recently to compare latency, gain, and noise characteristics of two commercially available electromagnetic trackers: Ascension Technology Corp.'s Flock of Birds™ and Polhemus Inc.'s Fastrak™.
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Blackwood, C. Brian, Tracy J. Yuen, Bruce J. Sangeorzan, and William R. Ledoux. "The Midtarsal Joint Locking Mechanism." Foot & Ankle International 26, no. 12 (December 2005): 1074–80. http://dx.doi.org/10.1177/107110070502601213.
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Background: The midtarsal joint, consisting of the talonavicular and the calcaneocuboid joints, is presumed to be responsible for the foot being both flexible and rigid during different parts of the stance phase of gait. However, this mechanism has never been well quantified. This study explores the midtarsal joint locking mechanism by comparing the effect of hindfoot inversion and eversion on midfoot and forefoot mobility. Methods: Motion of the tibia, talus, calcaneus, navicular, cuboid and the first, second, and fifth metatarsals were measured in nine cadaver feet using Polhemus Fastrak® electromagnetic sensors (EST GmbH & Co. KG, Kaiserslautern, Germany). The talus was fixed to the tibia, and then the forefoot was maximally dorsiflexed, plantarflexed, inverted, and everted, with the hindfoot in maximal eversion and inversion, for a total of eight test positions. The range of motion of the individual bones between maximal forefoot dorsiflexion and plantarflexion and between maximal forefoot inversion and eversion was calculated for the hindfoot in maximal eversion and inversion. Results: For the range of motion from maximal dorsiflexion to maximal plantarflexion there was significantly increased movement of the first, second, and fifth metatarsals in the sagittal plane ( p-value = 0.003, 0.007, and 0.002, respectively) when the calcaneus was maximally everted compared to when the calcaneus was maximally inverted. No significant differences were detected for the range of motion from forefoot inversion to eversion for the two hindfoot positions. Conclusions: This study demonstrated that motion in the forefoot is influenced by hindfoot position through the midtarsal joint. Specifically, the sagittal plane range of motion of the metatarsals is increased when the hindfoot is in valgus.
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Albert, Wayne J., Joan M. Stevenson, Geneviève A. Dumas, and Roger W. Wheeler. "Effects of shoulder translation on lumbar moment for two dimensional modeling strategies during lifting." Occupational Ergonomics 1, no. 3 (August 1, 1998): 173–87. http://dx.doi.org/10.3233/oer-1998-1302.
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The objectives of this study were to: 1) develop a dynamic 2D link segment model for lifting using the constraints of four sensors from an electromagnetic motion analysis system; 2) evaluate the magnitude of shoulder movement in the sagittal plane during lifting; and 3) investigate the effect of shoulder translation on trunk acceleration and lumbar moments calculated by the developed model and comparing it with two separate 2D dynamic link segment models. Six women and six men lifted loads of 2 kg, 7 kg, 12 kg and 2 kg, 12 kg, 22 kg respectively, under stoop, squat and freestyle conditions. Trunk orientation and position, as well as shoulder position were monitored during all lifts using the Polhemus FASTRAK\trdmk. Results indicated that average range of motion was 0.05 ± 0.02 m in the horizontal direction and 0.03 ± 0.02 m in the vertical direction. Shoulder position relative to T1 was located 0.07 ± 0.02 m anteriorly, and 0.02 ± 0.04 m superiorly (0.06 and 0.00 m for males and 0.08 and 0.04 m for females, respectively). To estimate the effect of shoulder motion on trunk acceleration and L5/S1 moments, three two-dimensional dynamic link segment models were developed within the constraints of the electromagnetic tracking system and compared. Trunk segment endpoints were defined as L5/S1 and either T1 or shoulder depending on model type. For trunk accelerations, average differences between models were greater than 40 deg/s² in 70.4% trunk accelerations did not translate into significantly different moment calculations between models. Average peak dynamic L5/S1 moment differences between models were smaller than 4 Nm for all lifting conditions which failed to be statistically significant (p>0.05). The model type did not have a statistically significant effect on peak L5/S1 moments. Therefore, despite important shoulder joint translations, peak L5/S1 moments were not significantly affected.
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Deubel, H., S. Shimojo, and I. Paprotta. "The Preparation of Goal-Directed Movements Requires Selective Visual Attention: Evidence from the Line-Motion Illusion." Perception 26, no. 1_suppl (August 1997): 124. http://dx.doi.org/10.1068/v970060.
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Previous research has demonstrated that visual attention is focused on the movement target, both before saccadic eye movements and before manual reaching, allowing for spatially selective object recognition (Deubel and Schneider, 1996 Vision Research36 1827 – 1837; Deubel, Schneider, and Paprotta, 1996 Perception Supplement, 13 – 19). Here we study the illusory line motion effect (Hikosaka et al, 1993 Vision Research33 1219 – 1240) in a dual-task paradigm to further investigate the coupling of attention and movement target selection. Subjects were presented a display with two potential movement targets (small circles). When one of the circles flashed, they performed a reaching movement with the unseen hand to the other stimulus; movements were registered with a Polhemus FastTrack system. At a SOA that was varied between 0 and 1000 ms after the movement cue, a line appeared and connected both stimuli. After the reaching movement, subjects indicated the perceived direction of line motion. In a second experiment, saccadic eye movements instead of reaching movements were studied. The data show that for short SOAs the subjects reported illusory line motion away from the cue location indicating that attention is automatically drawn to the cue. For longer SOAs but well before movement onset the illusory motion effect inverted—evidence for an attention shift to the movement target. The findings were very similar for manual reaching and for saccadic eye movements. The results confirm the hypothesis that the preparation of a goal-directed movement requires the attentional selection of the movement target. We discuss the assumption of a unitary attention mechanism which selects an object for visual processing, and simultaneously provides the information necessary for goal-directed motor action such as saccades, pointing, and grasping.
Dissertations / Theses on the topic "FASTRAK; Movement"
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Jordan, Kelvin. "Statistical assessment of cervical spine and shoulder range of motion." Thesis, Keele University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323756.
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Measuring range of motion (for example, of the cervical spine or shoulder) is a common feature in the diagnosis and longitudinal assessment of many medical conditions. Current clinical methods, however, cannot measure combinations of movement or velocity of movement. A new threedimensional measuring system, the FASTRAK, can measure range of motion in the primary plane of movement and also in secondary planes of movement. Further, it can measure concurrent threedimensional movement of the body elsewhere; for example, of the trunk. In order for a measured change in range of motion to be confidently perceived as real change, the measuring tool has to be shown to be reliable. This study commences by performing systematic reviews assessing the evidence for the reliability of current cervical spine and shoulder range of motion measuring tools. The reliability of the FASTRAK in measuring cervical spine and shoulder range of motion is then assessed on healthy subjects with unrestricted neck and shoulder movement. The methodology and analysis provides a framework for future reliability studies of this nature. Range of motion is often limited in subjects with diagnosed ankylosing spondylitis (AS). To assess the ability of the FASTRAK to differentiate between a non-diseased population and subjects with AS, and between different severities of AS, the FASTRAK is applied to a sample of AS subjects in a longitudinal study. Pictures of movement are built up and compared, using a novel application of repeated measures multilevel modelling, for both healthy and AS subjects. The use of multilevel modelling to build these pictures of movement is evaluated. Clinical validation of the models and the usefulness and acceptability of the FASTRAK in a clinical setting is assessed through the process of semi-structured interviews with clinicians from the disciplines most likely to make range of motion measurements in clinical practice.
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Jern, Emma, and Sara Mogren. ""DET DU LÄR MED KROPPEN FASTNAR I KNOPPEN" : Lärares uppfattningar om betydelsen av fysisk aktivitet i undervisningen." Thesis, Högskolan i Skövde, Institutionen för kommunikation och information, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-8053.
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Fysisk aktivitet i undervisningen och dess inverkan på elevers kognitiva förmågor upplever vi som ett väsentligt inslag i grundskolans tidigare år. Syftet med studien har varit att undersöka omfattningen av lärares uppfattningar kring denna inverkan samt deras åsikter kring detta arbetssätt och dess effekter. Metoden som använts har varit kvantitativ med en kvalitativ del och har utgått från en enkät med såväl kvantitativa som kvalitativa frågor. Enkäten delades ut till lärare i nio olika grundskolor i två kommuner i Västra Götalands län. Genom enkäten har vi undersökt utbredningen av lärarnas åsikter kring fysisk aktivitet i undervisningen och även gett dem utrymme att motivera och förklara sina åsikter.Resultatet av studien visar att majoriteten av lärarna anser att fysisk aktivitet i undervisningen har en positiv inverkan på elevers kognitiva förmågor såsom koncentration, minne och lärande. De uttrycker att de upplever arbetssättet som övervägande positivt och ger även uttryck för sina erfarenheter kring vad det är med arbetssättet som resulterar i de effekter det medför. Resultatet visar bland annat att lärarna ser att arbetssättet tillgodoser elevernas behov av att få använda flera sinnen i sitt lärande.Slutligen diskuterar vi resultatet med utgångspunkt i forskning, litteratur och teori.Bland annat diskuterar vi den fysiska aktivitetens placering i undervisningen, om den bör integreras eller fungera som en paus. Vi diskuterar även vikten av ett varierat arbetssätt för att tillgodose elevers olika lärstilar och öppna upp för användande av fler sinnen i undervisningen.Physical activity in teaching and its impact on students’ cognitive abilities is something we experience as an essential part of primary education. The aim of the study was to examine the extent of teachers’ perceptions of this impact as well as their opinions about this working method and its effects. The method used in the study was quantitative with a qualitative part and was based on a questionnaire with both quantitative and qualitative questions. The questionnaire was handed to teachers in nine different elementary schools in two municipalities in the county of Västra Götaland, Sweden. Through the survey, we investigated the distribution of teachers’ opinions about physical activity in teaching and also gave them space to justify and explain their opinions.The results of the study show that the majority of the teachers think that physical activity in education has a positive impact on students’ cognitive abilities such as concentration, memory and learning. They express that they experience this way of working as mainly positive and also express their experiences concerning what it is about this working method that results in the effects that it brings. The result shows that the teachers perceive that the working method meets pupils’ needs to use multiple senses in learning.Finally, we discuss the results on the basis of research, literature and theory. Among other things, we discuss the physical task's position in teaching, whether it should be integrated or act as a break. We also discuss the importance of a varied approach to meet students' different learning styles, and open up the use of more senses in teaching.
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Stewart, Michael L. "Variation Simulation of Fixtured Assembly Processes for Compliant Structures Using Piecewise-Linear Analysis." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd563.pdf.
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