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passive self-motion

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https://www.readbyqxmd.com/read/29096909/-assessment-of-mood-disorders-by-passive-data-gathering-the-concept-of-digital-phenotype-versus-psychiatrist-s-professional-culture
#1
A Bourla, F Ferreri, L Ogorzelec, C Guinchard, S Mouchabac
OBJECTIVES: The search for objective clinical signs is a constant practitioners' and researchers' concern in psychiatry. New technologies (embedded sensors, artificial intelligence) give an easier access to untapped information such as passive data (i.e. that do not require patient intervention). The concept of "digital phenotype" is emerging in psychiatry: a psychomotor alteration translated by accelerometer's modifications contrasting with the usual functioning of the subject, or the graphorrhea of patients presenting a manic episode which is replaced by an increase of SMS sent...
October 30, 2017: L'Encéphale
https://www.readbyqxmd.com/read/29043978/a-unified-internal-model-theory-to-resolve-the-paradox-of-active-versus-passive-self-motion-sensation
#2
Jean Laurens, Dora E Angelaki
Brainstem and cerebellar neurons implement an internal model to accurately estimate self-motion during externally generated ('passive') movements. However, these neurons show reduced responses during self-generated ('active') movements, indicating that predicted sensory consequences of motor commands cancel sensory signals. Remarkably, the computational processes underlying sensory prediction during active motion and their relationship to internal model computations during passive movements remain unknown. We construct a Kalman filter that incorporates motor commands into a previously established model of optimal passive self-motion estimation...
October 18, 2017: ELife
https://www.readbyqxmd.com/read/28959018/decoupled-choice-driven-and-stimulus-related-activity-in-parietal-neurons-may-be-misrepresented-by-choice-probabilities
#3
Adam Zaidel, Gregory C DeAngelis, Dora E Angelaki
Trial-by-trial correlations between neural responses and choices (choice probabilities) are often interpreted to reflect a causal contribution of neurons to task performance. However, choice probabilities may arise from top-down, rather than bottom-up, signals. We isolated distinct sensory and decision contributions to single-unit activity recorded from the dorsal medial superior temporal (MSTd) and ventral intraparietal (VIP) areas of monkeys during perception of self-motion. Superficially, neurons in both areas show similar tuning curves during task performance...
September 28, 2017: Nature Communications
https://www.readbyqxmd.com/read/28898043/orthogonally-functionalized-donor-acceptor-homo-and-heterodimeric-dyes-for-dye-sensitized-solar-cells-an-approach-to-introduce-panchromaticity-and-control-the-charge-recombination
#4
Manik Chandra Sil, Vediappan Sudhakar, Munavvar Fairoos Mele Kavungathodi, Vellimalai Punitharasu, Jayaraj Nithyanandhan
Organic dyes possessing conjugated π-framework forms closely packed monolayers on photoanode in dye-sensitized solar cell (DSSC), because of the limitation to control the orientation and the extend of intermolecular π-π interaction, self-aggregation of dyes leads to reduced cell performance. In this report, a series of homodimeric (D1-D1 and D2-D2) and heterodimeric (D1-D2 and D2-D4) donor/acceptor (D/A) dyes containing spiroBiProDOT π-spacer were designed and synthesized by utilizing Pd-catalyzed direct arylation reaction and correlates the device performance with monomeric dyes (D1 and D2)...
October 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28772129/the-effects-of-ankle-braces-and-taping-on-lower-extremity-running-kinematics-and-energy-expenditure-in-healthy-non-injured-adults
#5
Kaori Tamura, Kara N Radzak, Rachele E Vogelpohl, Bethany A Wisthoff, Yukiya Oba, Ronald K Hetzler, Christopher D Stickley
Ankle braces and taping are commonly used to prevent ankle sprains and allow return to play following injury, however, it is unclear how passive restriction of joint motion may effect running gait kinematics and energy expenditure during exercise. The purpose of this study was to determine the effect of different types of ankle supports on lower extremity kinematics and energy expenditure during continuous running. Thirteen healthy physically active adults ran at self-selected speed on the treadmill for 30min in four different ankle support conditions: semi-rigid hinged brace, lace-up brace, tape and control...
October 2017: Gait & Posture
https://www.readbyqxmd.com/read/28770512/immediate-intensive-mobilization-compared-with-immediate-conventional-mobilization-for-the-impacted-osteoporotic-conservatively-treated-proximal-humeral-fracture-a-randomized-controlled-trial
#6
S Carbone, C Razzano, P Albino, R Mezzoprete
PURPOSE: To select in a 2-year survey of proximal humerus fractures accessing the emergency department, a population of osteoporotic stable impacted fractures and to randomize them into two groups, one with an immediate intensive mobilization program and the other with an immediate conventional mobilization program. METHODS: In emergency department, patients with clinical signs of shoulder girdle fracture were submitted to standard X-ray examination and CT scan...
August 2, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28769743/neural-response-to-biological-motion-in-healthy-adults-varies-as-a-function-of-autistic-like-traits
#7
Meghan H Puglia, James P Morris
Perception of biological motion is an important social cognitive ability that has been mapped to specialized brain regions. Perceptual deficits and neural differences during biological motion perception have previously been associated with autism, a disorder classified by social and communication difficulties and repetitive and restricted interests and behaviors. However, the traits associated with autism are not limited to diagnostic categories, but are normally distributed within the general population and show the same patterns of heritability across the continuum...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28755779/thermo-and-soluto-capillarity-passive-and-active-drops
#8
REVIEW
Yuri S Ryazantsev, Manuel G Velarde, Ramón G Rubio, Eduardo Guzmán, Francisco Ortega, Pilar López
A survey is provided of a variety of problems where a passive or an active drop experiences directed motion consequence of the action of an external or internal agent or a combination of both. An active drop is capable of reacting by engendering autonomous, self-propelled motion in favor or against the agent. The phenomena involved offer diverse complexity but one way or another the drop motion finally rests on thermo- or soluto-capillarity hence on interfacial tension gradients. Accordingly, here a minimal mathematical framework underlying such drop motions is provided when direct external temperature or solute gradients, illumination, internal heat generation or surface chemical reaction are incorporated into the physico-chemical-hydrodynamics...
July 20, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28742362/convective-self-sustained-motion-in-mixtures-of-chemically-active-and-passive-particles
#9
Oleg E Shklyaev, Henry Shum, Victor V Yashin, Anna C Balazs
We develop a model to describe the behavior of a system of active and passive particles in solution that can undergo spontaneous self-organization and self-sustained motion. The active particles are uniformly coated with a catalyst that decomposes the reagent in the surrounding fluid. The resulting variations in the fluid density give rise to a convective flow around the active particles. The generated fluid flow, in turn, drives the self-organization of both the active and passive particles into clusters that undergo self-sustained propulsion along the bottom wall of a microchamber...
August 3, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28720777/aging-and-rejuvenation-of-active-matter-under-topological-constraints
#10
Liesbeth M C Janssen, Andreas Kaiser, Hartmut Löwen
The coupling of active, self-motile particles to topological constraints can give rise to novel non-equilibrium dynamical patterns that lack any passive counterpart. Here we study the behavior of self-propelled rods confined to a compact spherical manifold by means of Brownian dynamics simulations. We establish the state diagram and find that short active rods at sufficiently high density exhibit a glass transition toward a disordered state characterized by persistent self-spinning motion. By periodically melting and revitrifying the spherical spinning glass, we observe clear signatures of time-dependent aging and rejuvenation physics...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28671813/self-powered-acceleration-sensor-based-on-liquid-metal-triboelectric-nanogenerator-for-vibration-monitoring
#11
Binbin Zhang, Lei Zhang, Weili Deng, Long Jin, Fengjun Chun, Hong Pan, Bingni Gu, Haitao Zhang, Zekai Lv, Weiqing Yang, Zhong Lin Wang
An acceleration sensor is an essential component of the vibration measurement, while the passivity and sensitivity are the pivotal features for its application. Here, we report a self-powered and highly sensitive acceleration sensor based on a triboelectric nanogenerator composed of a liquid metal mercury droplet (LMMD) and nanofiber-networked polyvinylidene fluoride (nn-PVDF) film. Due to the ultrahigh surface-to-volume ratio of nn-PVDF film and high surface tension, high mass density, high elastic as well as mechanical robustness of LMMD, the open-circuit voltage and short-circuit current reach up to 15...
July 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28665655/real-time-observation-of-internal-motion-within-ultrafast-dissipative-optical-soliton-molecules
#12
Katarzyna Krupa, K Nithyanandan, Ugo Andral, Patrice Tchofo-Dinda, Philippe Grelu
Real-time access to the internal ultrafast dynamics of complex dissipative optical systems opens new explorations of pulse-pulse interactions and dynamic patterns. We present the first direct experimental evidence of the internal motion of a dissipative optical soliton molecule generated in a passively mode-locked erbium-doped fiber laser. We map the internal motion of a soliton pair molecule by using a dispersive Fourier-transform imaging technique, revealing different categories of internal pulsations, including vibrationlike and phase drifting dynamics...
June 16, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28651417/-influences-of-different-rehabilitative-methods-on-function-of-hands-and-psychological-anxiety-of-patients-with-deeply-burned-hands-retaining-denatured-dermis-and-grafting-large-autologous-skin
#13
RANDOMIZED CONTROLLED TRIAL
H Peng, P F Liang, A Wang, L Q Yue
Objective: To investigate influences of different rehabilitative methods on function of hands and psychological anxiety of patients with deeply burned hands retaining denatured dermis and grafting large autologous skin. Methods: Forty-four patients with deeply burned hands, conforming to the study criteria were admitted to Department of Burns and Reconstructive Surgery of Xiangya Hospital of Central South University from January 2014 to June 2015. Patients were divided into propaganda education rehabilitation group (PER, n=23) and specially-assigned person rehabilitation group (SAPR, n=21) according to the random number table and patients' willingness...
May 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28631623/morphological-self-stabilization-of-locomotion-gaits-illustration-on-a-few-examples-from-bio-inspired-locomotion
#14
Christine Chevallereau, Frédéric Boyer, Mathieu Porez, Johan Mauny, Yannick Aoustin
To a large extent, robotics locomotion can be viewed as cyclic motions, named gaits. Due to the high complexity of the locomotion dynamics, to find the control laws that ensure an expected gait and its stability with respect to external perturbations, is a challenging issue for feedback control. To address this issue, a promising way is to take inspiration from animals that intensively exploit the interactions of the passive degrees of freedom of their body with their physical surroundings, to outsource the high-level exteroceptive feedback control to low-level proprioceptive ones...
June 20, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28575032/envelope-statistics-of-self-motion-signals-experienced-by-human-subjects-during-everyday-activities-implications-for-vestibular-processing
#15
Jérome Carriot, Mohsen Jamali, Kathleen E Cullen, Maurice J Chacron
There is accumulating evidence that the brain's neural coding strategies are constrained by natural stimulus statistics. Here we investigated the statistics of the time varying envelope (i.e. a second-order stimulus attribute that is related to variance) of rotational and translational self-motion signals experienced by human subjects during everyday activities. We found that envelopes can reach large values across all six motion dimensions (~450 deg/s for rotations and ~4 G for translations). Unlike results obtained in other sensory modalities, the spectral power of envelope signals decreased slowly for low (< 2 Hz) and more sharply for high (>2 Hz) temporal frequencies and thus was not well-fit by a power law...
2017: PloS One
https://www.readbyqxmd.com/read/28562674/how-does-functionality-proceed-in-acl-reconstructed-subjects-proceeding-of-functional-performance-from-pre-to-six-months-post-acl-reconstruction
#16
Frieder Cornelius Krafft, Bernd Josef Stetter, Thorsten Stein, Andree Ellermann, Johannes Flechtenmacher, Christian Eberle, Stefan Sell, Wolfgang Potthast
This is the first study examining functionality of subjects with anterior cruciate ligament (ACL) tears and a subsequent reconstruction comprehensively by multiple test sessions from pre- to six months post-reconstruction. The purpose was to evaluate if a generally applied rehabilitation program restores functionality to levels of healthy controls. Subjects with unilateral tears of the ACL were compared to matched healthy controls throughout the rehabilitation. 20 recreational athletes were tested: T1 (preoperative), 6 weeks after tear; T2, 6 weeks, T3, 3 months, T4, 6 months post-reconstruction...
2017: PloS One
https://www.readbyqxmd.com/read/28453288/photothermal-transport-of-dna-in-entropy-landscape-plasmonic-waveguides
#17
Cameron L C Smith, Anil H Thilsted, Jonas N Pedersen, Tomas H Youngman, Julia C Dyrnum, Nicolai A Michaelsen, Rodolphe Marie, Anders Kristensen
The ability to handle single, free molecules in lab-on-a-chip systems is key to the development of advanced biotechnologies. Entropic confinement offers passive control of polymers in nanofluidic systems by locally asserting a molecule's number of available conformation states through structured landscapes. Separately, a range of plasmonic configurations have demonstrated active manipulation of nano-objects by harnessing concentrated electric fields. The integration of these two independent techniques promises a range of sophisticated and complementary functions to handle, for example, DNA, but numerous difficulties, in particular, conflicting requirements of channel size, have prevented progress...
April 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28439720/the-impact-of-oral-promethazine-on-human-whole-body-motion-perceptual-thresholds
#18
Ana Diaz-Artiles, Adrian J Priesol, Torin K Clark, David P Sherwood, Charles M Oman, Laurence R Young, Faisal Karmali
Despite the widespread treatment of motion sickness symptoms using drugs and the involvement of the vestibular system in motion sickness, little is known about the effects of anti-motion sickness drugs on vestibular perception. In particular, the impact of oral promethazine, widely used for treating motion sickness, on vestibular perceptual thresholds has not previously been quantified. We examined whether promethazine (25 mg) alters vestibular perceptual thresholds in a counterbalanced, double-blind, within-subject study...
August 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28434022/effects-of-vestibular-disorders-on-vestibular-reflex-and-imagery
#19
B S Cohen, J Provasi, P Leboucher, I Israël
The aim of this study was to establish the effect of vestibular lesion on vestibular imagery. Subjects were required to estimate verbally their passively travelled rotation angles in complete darkness, i.e., to activate vestibular imagery. During motion, the vestibulo-ocular reflex (VOR) was measured. Thus, we examined the coherence between the vestibulo-ocular reflex and self-rotation imagery, with vestibular-lesioned patients and healthy participants. Unilateral acute and chronic patients, bilateral patients, and healthy subjects were compared...
July 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28422641/supporting-stroke-motor-recovery-through-a-mobile-application-a-pilot-study
#20
Sonia Lawson, Ziying Tang, Jinjuan Feng
Neuroplasticity and motor learning are promoted with repetitive movement, appropriate challenge, and performance feedback. ARMStrokes, a smartphone application, incorporates these qualities to support motor recovery. Engaging exercises are easily accessible for improved compliance. In a multiple-case, mixed-methods pilot study, the potential of this technology for stroke motor recovery was examined. Exercises calibrated to the participant's skill level targeted forearm, elbow, and shoulder motions for a 6-wk protocol...
May 2017: American Journal of Occupational Therapy: Official Publication of the American Occupational Therapy Association
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