Effects of lower trunk movement in flat-back syndrome during stair climbing: A technical note

2021 ◽  
pp. 1-7
Author(s):  
Yaoyao Liu ◽  
Won-Gyu Yoo
Keyword(s):  
Technical Note ◽  
Stair Climbing ◽  
Spinal Alignment ◽  
Energy Usage ◽  
Trunk Movement ◽  
Lower Trunk ◽  
The Third ◽  
Male Volunteers ◽  
Trunk Sway ◽  
Flat Back

OBJECTIVE: This study investigated the differences in trunk sway during stair climbing between people with normal spinal alignment and people with flat-back syndrome. METHODS: Twelve male volunteers with flat-back syndrome (global angle < 20 degrees) and 12 male volunteers with normal spinal alignment (global angle between 20 degrees and 30 degrees) were enrolled. An accelerator was attached to the third lumbar spine and the sway of each participant’s trunk was measured during stair climbing. RESULT: Participants with flat-back syndrome showed significant differences in vector, anteroposterior sway, and vertical sway of the trunk during stair climbing (p< 0.05). However, mediolateral sway of the trunk and gait time did not significantly differ between groups (p> 0.05). CONCLUSION: Our findings can be used as baseline data for prevention of back pain. Furthermore, increased trunk sway can cause increased energy usage, leading to inefficient gait. Further research is needed to prevent this problem.

scholarly journals Technical note: A time-integrated sediment trap to sample diatoms for hydrological tracing

2020 ◽  
Vol 24 (10) ◽  
pp. 4709-4725
Author(s):  
Jasper Foets ◽  
Carlos E. Wetzel ◽  
Núria Martínez-Carreras ◽  
Adriaan J. Teuling ◽  
Jean-François Iffly ◽  
...  
Keyword(s):  
Water Quality Assessment ◽  
Technical Note ◽  
Sampling Effort ◽  
Terrestrial Environment ◽  
The Third ◽  
Run Off ◽  
Analysis Of Similarity ◽  
Sediment Data ◽  
Almost All ◽  
Diatom Community Composition

Abstract. Diatoms, microscopic single-celled algae, are present in almost all habitats containing water (e.g. streams, lakes, soil and rocks). In the terrestrial environment, their diversified species distributions are mainly controlled by physiographical factors and anthropic disturbances which makes them useful tracers in catchment hydrology. In their use as a tracer, diatoms are generally sampled in streams by means of an automated sampling method; as a result, many samples must be collected to cover a whole storm run-off event. As diatom analysis is labour-intensive, a trade-off has to be made between the number of sites and the number of samples per site. In an attempt to reduce this sampling effort, we explored the potential for the Phillips sampler, a time-integrated mass-flux sampler, to provide a representative sample of the diatom assemblage of a whole storm run-off event. We addressed this by comparing the diatom community composition of the Phillips sampler to the composite community collected by automatic samplers for three events. Non-metric multidimensional scaling (NMDS) showed that, based on the species composition, (1) all three events could be separated from each other, (2) the Phillips sampler was able to sample representative communities for two events and (3) significantly different communities were only collected for the third event. These observations were generally confirmed by analysis of similarity (ANOSIM), permutational multivariate analysis of variance (PERMANOVA), and the comparison of species relative abundances and community-derived indices. However, sediment data from the third event, which was sampled with automatic samplers, showed a large amount of noise; therefore, we could not verify if the Phillips sampler sampled representative communities or not. Nevertheless, we believe that this sampler could not only be applied in hydrological tracing using terrestrial diatoms, but it might also be a useful tool in water quality assessment.

Prediction of Human Segment Inertias during Pregnancy

1996 ◽  
Vol 12 (1) ◽  
pp. 15-30 ◽  
Author(s):  
Robert K. Jensen ◽  
Tina Treitz ◽  
Sylvie Doucet
Keyword(s):  
Longitudinal Study ◽  
Repeated Measures ◽  
Center Of Mass ◽  
Predictor Variables ◽  
Radius Of Gyration ◽  
Regression Equations ◽  
Lower Trunk ◽  
The Third ◽  
Cylinder Model ◽  
Linear Regressions

The purpose of this study was to develop prediction equations to estimate mass, radius to the center of mass (CM), and principal moments of the segments during pregnancy. Nonlinear regression equations were determined for the lower trunk, upper trunk, and thigh. The third sampling month of a longitudinal study was used (Sample 1,n= 15). The nonlinear regressions were then used to predict segment inertias above and below the third sampling month (Sample 2, the remaining 74 measurements). For the remaining segments, body mass and segment lengths were used as predictor variables for mass, radius to CM, and radius of gyration about the centroidal axes. The remaining seven segments did not change substantially during pregnancy, and the means of the repeated measures were used for the simple linear regressions. Eighteen of the 28 regressions and all of the CM regressions were significant. With pregnant subjects it is recommended that these regressions be used if application of the elliptical cylinder model is not possible.

Endoscopic Fenestration of Cavum Septum Pellucidum Cysts to the Third Ventricle: Technical Note

2020 ◽  
Vol 19 (4) ◽  
pp. E434-E439
Author(s):  
Alexandre Simonin ◽  
Omar Bangash ◽  
Arjun S Chandran ◽  
Erik Uvelius ◽  
Christopher Lind
Keyword(s):  
Surgical Procedure ◽  
Clinical Presentation ◽  
Third Ventricle ◽  
Technical Note ◽  
Septum Pellucidum ◽  
Imaging Studies ◽  
Foramen Of Monro ◽  
Cavum Septum Pellucidum ◽  
The Third ◽  
Endoscopic Fenestration

Abstract BACKGROUND AND IMPORTANCE Cavum septum pellucidum (CSP) and cavum vergae (CV) cysts are common incidental findings on imaging studies. However, they may rarely present with symptoms related to the obstruction of the foramen of Monro by the cyst leaflets. There is no consensus regarding the management of symptomatic CSP and CV cysts. We present an original transcavum interforniceal endoscopic fenestration technique. The step-by-step surgical procedure and two illustrative cases are presented. CLINICAL PRESENTATION A 31-yr-old male and a 24-yr-old woman presented with symptomatic CSP and CV cysts. For both patients, neuronavigation was used to plan the procedure. An endoscope was introduced into the cyst through a right frontal burr-hole. After an examination of the endoscopic anatomy, a communication between the cyst and the third ventricle was performed using an endoscopic forceps. In both cases, directly after the fenestration, cerebrospinal fluid (CSF) passed through the communication, and the collapse of the cyst was appreciated. Symptoms were relieved in both patients, and neuropsychological assessment improved. Postoperative imaging showed a reduction in the cyst bulge, and patent foramen of Monro. CONCLUSION Endoscopic fenestration of CSP and CV cysts to the third ventricle through an interforniceal navigated approach is a feasible and efficient surgical procedure. Theoretical advantages include a single tract through noneloquent brain, a perpendicular trajectory to the membrane for fenestration, and a large CSF space beyond the fenestration point.

P 002 – Ankle muscle strength and its relationship to the lower trunk movement during running

2018 ◽  
Vol 65 ◽  
pp. 237-238
Author(s):  
L. Bizovska ◽  
Z. Gonosova ◽  
Z. Svoboda ◽  
P. Linduska ◽  
M. Janura
Keyword(s):  
Muscle Strength ◽  
Trunk Movement ◽  
Lower Trunk ◽  
Ankle Muscle

Release of Anterior Longitudinal Ligament in Setting of Unfavorable Vascular Anatomy for Anterior Column Realignment—Technical Note: 2-Dimensional Operative Video

2019 ◽  
Vol 19 (2) ◽  
pp. E189-E189
Author(s):  
Jakub Godzik ◽  
Corey T Walker ◽  
Alexander C Whiting ◽  
Randall J Hlubek ◽  
Juan S Uribe ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Surgical Techniques ◽  
Technical Note ◽  
Anterior Column ◽  
Preoperative Imaging ◽  
Invasive Technique ◽  
Anterior Longitudinal Ligament ◽  
Transpsoas Approach ◽  
Patient Consent ◽  
Flat Back

Abstract Anterior column realignment (ACR) with anterior longitudinal ligament (ALL) release from a lateral transpsoas approach is increasingly being used as a minimally invasive technique to restore lordosis. Safe execution requires a plane between the ALL and the anterior vasculature. An unfavorable plane on preoperative imaging is a contraindication to using the technique. We describe a patient undergoing multistage minimally invasive correction of a flat-back deformity who had an unfavorable plane between the ALL and vasculature at L4-5. Patient consent was provided, and Institutional Review Board approval was not required. To safely complete the ALL release and ACR, we elected to sharply incise the lateral aspect of the ligament at L4-5 with direct control of the vessels during the anterior approach for an L5-S1 anterior lumbar interbody fusion. We then moved to the lateral transpsoas approach and used controlled distraction techniques to complete the ALL release and then to complete the ACR in a standard fashion. We ultimately achieved excellent realignment with correction of the patient's flat-back deformity using minimally invasive surgical techniques while minimizing vascular risk. Used with permission from Barrow Neurological Institute, Phoenix, Arizona.

Changes in step time variability, not changes in step length and width, are associated with lower-trunk sway during dual-task gait in older adults

2019 ◽  
Vol 66 ◽  
pp. 157-163 ◽  
Author(s):  
Tsuyoshi Asai ◽  
Kensuke Oshima ◽  
Yoshihiro Fukumoto ◽  
Hiroki Kubo ◽  
Shota Koyama ◽  
...  
Keyword(s):  
Older Adults ◽  
Dual Task ◽  
Step Length ◽  
Time Variability ◽  
Lower Trunk ◽  
Trunk Sway
Sign in / Sign up

Export Citation Format

Share Document