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https://www.readbyqxmd.com/read/28095539/a-proposed-method-for-upper-eyelid-and-infrabrow-tightening-using-a-transcutaneous-temperature-controlled-radiofrequency-device-with-opaque-plastic-eye-shields
#1
Douglas J Key, Lauren Boudreaux
BACKGROUND: Laxity of the eyelid and periorbital area, a common manifestation of aging, is usually addressed via blepharoplasty and/ or fat transfer. Given the trend toward safer, less invasive treatments preferred by those patients reticent to undergo more invasive procedures, viable alternatives have been sought. Transcutaneous temperature controlled radiofrequency (TTCRF) integrates non- invasive super cial RF treatment with automatic temperature feedback control of energy deposition, as a stimulator of overall collagen remodeling; however, the globe of the eye is particularly sensitive to RF energy...
November 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28092577/social-touch-technology-a-survey-of-haptic-technology-for-social-touch
#2
Gijs Huisman
This survey provides an overview of work on haptic technology for social touch. Social touch has been studied extensively in psychology and neuroscience. With the development of new technologies it is now possible to engage in social touch at a distance or engage in social touch with artificial social agents. Social touch research has inspired research into technology mediated social touch, and this line of research has found effects similar to actual social touch. The importance of haptic stimulus qualities, multimodal cues, and contextual factors in technology mediated social touch is discussed...
January 9, 2017: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/28092413/disruption-of-right-posterior-parietal-cortex-by-ctbs-alters-the-control-of-body-balance-in-quiet-stance
#3
David Kaulmann, Joachim Hermsdörfer, Leif Johannsen
Control of body balance relies on the integration of multiple sensory modalities. Lightly touching an earth-fixed reference augments the control of body sway. We aimed to advance the understanding of cortical integration of an afferent signal from light fingertip contact (LT) for the stabilisation of standing body balance. Assuming that right-hemisphere Posterior Parietal Cortex (rPPC) is involved in the integration and processing of touch for postural control, we expected that disrupting rPPC would attenuate any effects of light touch...
January 16, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28080111/generalized-movement-representation-in-haptic-perception
#4
Lucile Dupin, Vincent Hayward, Mark Wexler
The extraction of spatial information by touch often involves exploratory movements, with tactile and kinesthetic signals combined to construct a spatial haptic percept. However, the body has many tactile sensory surfaces that can move independently, giving rise to the source binding problem: when there are multiple tactile signals originating from sensory surfaces with multiple movements, are the tactile and kinesthetic signals bound to one another? We studied haptic signal combination by applying the tactile signal to a stationary fingertip while another body part (the other hand or a foot) or a visual target moves, and using a task that can only be done if the tactile and kinesthetic signals are combined...
January 12, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28070622/haptic-feedback-attenuates-illusory-bias-in-pantomime-grasping-evidence-for-a-visuo-haptic-calibration
#5
Jillian Chan, Matthew Heath
Relative visual information has been shown to mediate grasping responses directed to an area previously occupied by a target object (i.e., pantomime-grasping) and is an information type functionally distinct from the absolute visual information supporting naturalistic grasping (i.e., grasping a physical target). Pantomime- and naturalistic grasps differ not only in terms of their visual properties, but also because the former lacks physical interaction with a target object (i.e., no-haptic feedback). The absence of haptic feedback may represent a reason why pantomime- and naturalistic grasps differ...
January 9, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28068514/interpersonal-interactions-for-haptic-guidance-during-maximum-forward-reaching
#6
S M Steinl, L Johannsen
Caregiver-patient interactions rely on interpersonal coordination (IPC) involving the haptic and visual modalities. We investigated in healthy individuals spontaneous IPC during joint maximum forward reaching. A 'contact-provider' (CP; n=2) kept light interpersonal touch (IPT) laterally with the wrist of the extended arm of a forward reaching, blind-folded 'contact-receiver' (CR; n=22). Due to the stance configuration, CP was intrinsically more stable. CR received haptic feedback during forward reaching in two ways: (1) presence of a light object (OBT) at the fingertips, (2) provision of IPT...
December 30, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28055906/haptics-in-music-the-effects-of-vibrotactile-stimulus-in-low-frequency-auditory-difference-detection-tasks
#7
Gareth W Young, Dave Murphy, Jeffrey Weeter
We present an experiment that investigated the effect of vibrotactile stimulation in auditory pitch discrimination tasks. Extra-auditory information was expected to have some influence upon the frequency discrimination of auditory Just Noticeable Difference (JND) detection levels at 160 Hz. To measure this, the potential to correctly identified positive and negative frequency changes for two randomly divided groups was measured and then compared. The first group was given an audio only JND test and the second group was given the same test, but with additional vibrotactile stimulus delivered via a vibrating glove device...
December 29, 2016: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/28035841/rehabilitation-robotics-for-the-upper-extremity-review-with-new-directions-for-orthopaedic-disorders
#8
Renée M Hakim, Brandon G Tunis, Michael D Ross
The focus of research using technological innovations such as robotic devices has been on interventions to improve upper extremity function in neurologic populations, particularly patients with stroke. There is a growing body of evidence describing rehabilitation programs using various types of supportive/assistive and/or resistive robotic and virtual reality-enhanced devices to improve outcomes for patients with neurologic disorders. The most promising approaches are task-oriented, based on current concepts of motor control/learning and practice-induced neuroplasticity...
December 30, 2016: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28026784/kilohertz-bandwidth-dual-stage-haptic-device-lets-you-touch-brownian-motion
#9
Tianming Lu, Cecile Pacoret, David Heriban, Abdenbi Mohand-Ousaid, Stephane Regnier, Vincent Hayward
This paper describes a haptic interface that has a uniform response over the entire human tactile frequency range. Structural mechanics makes it very difficult to implement articulated mechanical systems that can transmit high frequency signals. Here, we separated the frequency range into two frequency bands. The lower band is within the first structural mode of the corresponding haptic device while the higher one can be transmitted accurately by a fast actuator operating from conservation of momentum, that is, without reaction forces to the ground...
December 23, 2016: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/28018904/3d-volumetric-modeling-and-microvascular-reconstruction-of-irradiated-lumbosacral-defects-after-oncologic-resection
#10
Emilio Garcia-Tutor, Marco Romeo, Michael P Chae, David J Hunter-Smith, Warren Matthew Rozen
BACKGROUND: Locoregional flaps are sufficient in most sacral reconstructions. However, large sacral defects due to malignancy necessitate a different reconstructive approach, with local flaps compromised by radiation and regional flaps inadequate for broad surface areas or substantial volume obliteration. In this report, we present our experience using free muscle transfer for volumetric reconstruction, in such cases, and demonstrate three-dimensional (3D) haptic models of the sacral defect to aid preoperative planning...
2016: Frontiers in Surgery
https://www.readbyqxmd.com/read/28008321/effect-of-redundant-haptic-information-on-task-performance-during-visuo-tactile-task-interruption-and-recovery
#11
Hee-Seung Moon, Jongsoo Baek, Jiwon Seo
Previous studies have revealed that interruption induces disruptive influences on the performance of cognitive tasks. While much research has focused on the use of multimodal channels to reduce the cost of interruption, few studies have utilized haptic information as more than an associative cue. In the present study, we utilized a multimodal task interruption scenario involving the simultaneous presentation of visual information and haptic stimuli in order to investigate how the combined stimuli affect performance on the primary task (cost of interruption)...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/28007114/in%C3%A2-vitro-delivery-performance-assessment-of-a-new-preloaded-intraocular-lens-delivery-system
#12
Lixin Wang, Patricia Wolfe, Alexis Chernosky, Sumit Paliwal, Khiun Tjia, Stephen Lane
PURPOSE: To compare the delivery performance of a new preloaded intraocular lens (IOL) delivery system (Ultrasert [system U]) with that of 2 commercially available preloaded systems (iSert [system S] and Tecnis iTec [system T]), and a manual system (Monarch III D). SETTING: Alcon Laboratories, Fort Worth, Texas, USA. DESIGN: Experimental study. METHODS: Freshly excised porcine eyes were randomly assigned to 5 groups of 10 eyes each as follows: preloaded systems U, S, T 2...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28007100/iris-fixation-of-posterior-chamber-intraocular-lenses
#13
Alireza Yazdani-Abyaneh, Ali R Djalilian, Masoud Aghsaei Fard
: We introduce a technique for iris fixation of a posterior chamber intraocular lens (IOL) in which most of the procedure is done outside the eye. This minimizes intraocular manipulation, maximizes corneal endothelial preservation, and avoids the risk for IOL drop into the vitreous cavity intraoperatively. The IOL is fixated to the most peripheral part of the iris, resulting in a rounder pupil. Sutures are placed at exact positions on the haptics, resulting in a well-centered IOL. FINANCIAL DISCLOSURE: None of the authors has a financial or proprietary interest in any material or method mentioned...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28003799/ergonomics-of-laparoscopic-graspers-and-the-importance-of-haptic-feedback-the-surgeons-perspective
#14
Chantal C J Alleblas, Michel P H Vleugels, Theodoor E Nieboer
Haptic feedback is drastically reduced in laparoscopic surgery compared to open surgery. Introducing enhanced haptic feedback in laparoscopic instruments might well improve surgical safety and efficiency. In the design process of a laparoscopic grasper with enhanced haptic feedback, handle design should be addressed to strive for optimal usability and comfort. Additionally, the surgeons' perspective on the potential benefits of haptic feedback should be assessed to ascertain the clinical interest of enhanced haptic feedback...
2016: Gynecological Surgery
https://www.readbyqxmd.com/read/27994398/risk-of-breaking-haptic-of-trifocal-iol-and-its-management
#15
Tariq Alasbali
Fracture of an intraocular lens (IOL) haptic is a rare complication of cataract surgery. A broken haptic can cause serious damage in the anterior and posterior segments. To the best of our knowledge, a broken haptic in a high-quality, commercially available trifocal IOL has not been documented in the literature. Prompt and proactive action at 1 day postoperatively aided in addressing the complication and restoring the vision. We suggest that the ophthalmologist performed a thorough evaluation on the 1(st) postoperative day and take immediate action after a discussion with the patient and relatives...
October 2016: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/27992349/design-and-psychophysical-evaluation-of-the-hapsticks-a-novel-non-grounded-mechanism-for-presenting-tool-mediated-vertical-forces
#16
Ginga Kato, Yoshihiro Kuroda, Ilana Nisky, Kiyoshi Kiyokawa, Haruo Takemura
Force feedback in tool-mediated interactions with the environment is important for the successful performance of complex tasks in daily life as well as in specialized fields such as medicine. Most stylus-based haptic devices require either grounding or attachment to the user's body. Recently, non-grounded haptic devices have attracted a growing interest. In this study, we propose a non-grounded rotation mechanism to represent the vertical forces applied on the tip of a tool by mimicking the cutaneous sensations that are caused by such forces...
December 12, 2016: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/27992322/energy-prediction-for-teleoperation-systems-that-combine-the-time-domain-passivity-approach-with-perceptual-deadband-based-haptic-data-reduction
#17
Xiao Xu, Clemens Schuwerk, Burak Cizmeci, Eckehard Steinbach
We study the combination of the perceptual deadband (PD)-based haptic packet rate reduction scheme with the time domain passivity approach (TDPA) for time-delayed teleoperation and propose a novel energy prediction (EP) scheme that deals with the conservative behavior of the resulting controller. The PD approach leads to irregular packet transmission, resulting in degraded system transparency and reduced teleoperation quality when the PD approach is combined with the TDPA. The proposed method (PD+TDPA+EP) adaptively predicts the system energy during communication interruptions and allows for larger energy output...
October 2016: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/27986443/3d-printed-simulation-device-for-orbital-surgery
#18
Juergen Thomas Lichtenstein, Alexander Nicolai Zeller, Juliana Lemound, Thorsten Enno Lichtenstein, Majeed Rana, Nils-Claudius Gellrich, Maximilian Eberhard Wagner
OBJECTIVES: Orbital surgery is a challenging procedure because of its complex anatomy. Training could especially benefit from dedicated study models. The currently available devices lack sufficient anatomical representation and realistic soft tissue properties. Hence, we developed a 3D-printed simulation device for orbital surgery with tactual (haptic) correct simulation of all relevant anatomical structures. DESIGN, SETTING, AND PARTICIPANTS: Based on computed tomography scans collected from patients treated in a third referral center, the hard and soft tissue were segmented and virtually processed to generate a 3D-model of the orbit...
January 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/27980513/the-use-of-haptic-interfaces-and-web-services-in-crystallography-an-application-for-a-screen-to-beam-interface
#19
Andrew E Bruno, Alexei S Soares, Robin L Owen, Edward H Snell
Haptic interfaces have become common in consumer electronics. They enable easy interaction and information entry without the use of a mouse or keyboard. The work presented here illustrates the application of a haptic interface to crystallization screening in order to provide a natural means for visualizing and selecting results. By linking this to a cloud-based database and web-based application program interface, the same application shifts the approach from 'point and click' to 'touch and share', where results can be selected, annotated and discussed collaboratively...
December 1, 2016: Journal of Applied Crystallography
https://www.readbyqxmd.com/read/27979361/-warming-up-with-endotrainer-prior-to-laparoscopic-cholecystectomy
#20
Alicia Troncoso-Bacelis, Jaime Soto-Amaro, Carlos Ramírez-Velázquez
BACKGROUND: Laparoscopic cholecystectomy is a safe and effective treatment and remains the gold standard in patients with benign disease. However it presents difficulties such as: the limited movement range of the instruments, the loss of depth perception, haptic feedback and the fulcrum effect. Previous training can optimize surgical performance in patients to master basic skills. OBJECTIVE: Assess the effectiveness of surgeons warming up with an endotrainer before performing laparoscopic cholecystectomy...
December 12, 2016: Cirugia y Cirujanos
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