keyword
MENU ▼
Read by QxMD icon Read
search

eye reconstruction

keyword
https://www.readbyqxmd.com/read/28334883/selective-impairment-of-hippocampus-and-posterior-hub-areas-in-alzheimer-s-disease-an-meg-based-multiplex-network-study
#1
Meichen Yu, Marjolein M A Engels, Arjan Hillebrand, Elisabeth C W van Straaten, Alida A Gouw, Charlotte Teunissen, Wiesje M van der Flier, Philip Scheltens, Cornelis J Stam
Although frequency-specific network analyses have shown that functional brain networks are altered in patients with Alzheimer's disease, the relationships between these frequency-specific network alterations remain largely unknown. Multiplex network analysis is a novel network approach to study complex systems consisting of subsystems with different types of connectivity patterns. In this study, we used magnetoencephalography to integrate five frequency-band specific brain networks in a multiplex framework...
March 16, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28302062/ancestral-and-novel-roles-of-pax-family-genes-in-mollusks
#2
Maik Scherholz, Emanuel Redl, Tim Wollesen, André Luiz de Oliveira, Christiane Todt, Andreas Wanninger
BACKGROUND: Pax genes are transcription factors with significant roles in cell fate specification and tissue differentiation during animal ontogeny. Most information on their tempo-spatial mode of expression is available from well-studied model organisms where the Pax-subfamilies Pax2/5/8, Pax6, and Paxα/β are mainly involved in the development of the central nervous system (CNS), the eyes, and other sensory organs. In certain taxa, Pax2/5/8 seems to be additionally involved in the development of excretion organs...
March 16, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28300740/imiquimod-5-cream-for-the-treatment-of-large-nodular-basal-cell-carcinoma-at-the-medial-canthal-area
#3
Gamze Ozturk Karabulut, Pelin Kaynak, Can Ozturker, Korhan Fazil, Osman Bulut Ocak, Muhittin Taskapılı
Context (Background): Imiquimod (IMQ) 5% cream is an immunomodulatory and antitumorigenic agent, which was used as a topical treatment regimen, who had periocular basal cell carcinoma (BCC). AIM: This study aims to present three cases with large BCC at the medial canthal area treated with IMQ 5% cream. MATERIALS AND METHODS: IMQ 5% cream was used in three patients with ages 45, 49, and 73 who preferred medical treatment over surgery. Following incisional biopsy IMQ cream was used once a day, 5 times a week and the patients were followed up weekly during 12 week treatment period and monthly after the clearance of the lesion...
January 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28300738/preliminary-results-from-the-comparison-of-simple-limbal-epithelial-transplantation-with-conjunctival-limbal-autologous-transplantation-in-severe-unilateral-chronic-ocular-burns
#4
Ritu Arora, Pallavi Dokania, Aditi Manudhane, Jawahar Lal Goyal
PURPOSE: To compare the safety, efficacy, and clinical outcomes of simple limbal epithelial transplantation (SLET) with conjunctival-limbal autologous transplantation (CLAU) in severe unilateral ocular chemical burns. MATERIALS AND METHODS: Twenty patients of unilateral chronic ocular burns with more than 270° limbal stem cell deficiency and a healthy fellow eye were divided into two groups - ten patients of Group A underwent SLET while ten patients of Group B were operated for CLAU...
January 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28295917/gaze-based-rehearsal-in-children-under-7-a-developmental-investigation-of-eye-movements-during-a-serial-spatial-memory-task
#5
Candice C Morey, Silvana Mareva, Jaroslaw R Lelonkiewicz, Nicolas Chevalier
The emergence of strategic verbal rehearsal at around 7 years of age is widely considered a major milestone in descriptions of the development of short-term memory across childhood. Likewise, rehearsal is believed by many to be a crucial factor in explaining why memory improves with age. This apparent qualitative shift in mnemonic processes has also been characterized as a shift from passive visual to more active verbal mnemonic strategy use, but no investigation of the development of overt spatial rehearsal has informed this explanation...
March 12, 2017: Developmental Science
https://www.readbyqxmd.com/read/28291204/-staged-complex-treatment-of-paralytic-lagophthalmos-case-report
#6
M B Gushchina, S A Mal'kov, E V Kovshun, N S Yuzhakova
Paralytic lagophthalmos, resulting from facial nerve palsy, is a difficult medical and social issue that requires cooperation of different specialists. Complications that arise in paralytic lagophthalmos may cause significant vision loss and even eye loss. Various techniques of paralytic lagophthalmos correction are used to protect the cornea and restore eyelid anatomy and functions. These comprise palliative (conservative), surgical, and alternative treatments (such as botulinum toxin type A therapy). Surgical treatment of paralytic lagophthalmos patients often has to be staged and complex...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28290071/structural-connectivity-in-spatial-attention-network-reconstruction-from-left-hemispatial-neglect
#7
Takaaki Hattori, Kenji Ito, Chika Nakazawa, Yoshiyuki Numasawa, Mayumi Watanabe, Shigeki Aoki, Hidehiro Mizusawa, Sumio Ishiai, Takanori Yokota
Left hemispatial neglect (neglect) is an impaired state of spatial attention. We aimed to reconstruct structural connectivity in the spatial attention network and to identify disconnection patterns underlying neglect. We enrolled 59 right-handed patients who had their first-ever infarction in the right hemisphere and classified them into neglect group (34 patients with neglect) and control group (25 patients without neglect). The neglect group was further subcategorized into 6 subgroups based on infarcted vascular territories...
March 13, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28280895/epicanthoplasty-with-epicanthal-dermatic-tension-releasing-incision-based-on-skin-projection-of-inner-canthal-ligament
#8
Linghuan Zeng, Ying Cen, Junjie Chen, Lei Lei
BACKGROUND: Epicanthoplasty is a reconstructive procedure that eliminates the deformity of the epicanthal fold and provides a more esthetic inner canthus. The epicanthal tension-releasing incision is a core technique of epicanthoplasty. However, which epicanthal dermatic tension-releasing incision most effectively provides epicanthal tension release remains unclear. We designed a novel dermatic tension-releasing incision based on the skin projection of the inner canthal ligament and compared it with the more conventional incision parallel to the lower inner canthal mucocutaneous junction (white line)...
March 9, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28277482/the-role-of-prosthesis-spacer-for-ocular-prostheses
#9
Luiza Alencar De Andrade Figueiredo, Aline Araújo Sampaio, Samilly Evangelista Souza, Fernando José Rigolin Ferreira, Edmur Pereira Buzzá, Celia Marisa Rizzatti-Barbosa
Eye defects can lead to emotional, psychological, and social changes, impacting negatively the quality of life of the patient. When these structures cannot be satisfactorily repaired by reconstructive surgery, the prosthetic rehabilitation is the better treatment option to restore lost ocular anatomy and promote the social integration of the individual. The aim of this clinical report is to report and discuss a case of ocular prosthesis confection eviscerated patient with opening limitation eyelid and shortening of the distance between palpebral commissure, to obtain a more natural and comfortable to the patient ocular rehabilitation...
March 8, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28270978/optics-of-the-human-cornea-influence-the-accuracy-of-stereo-eye-tracking-methods-a-simulation-study
#10
A D Barsingerhorn, F N Boonstra, H H L M Goossens
Current stereo eye-tracking methods model the cornea as a sphere with one refractive surface. However, the human cornea is slightly aspheric and has two refractive surfaces. Here we used ray-tracing and the Navarro eye-model to study how these optical properties affect the accuracy of different stereo eye-tracking methods. We found that pupil size, gaze direction and head position all influence the reconstruction of gaze. Resulting errors range between ± 1.0 degrees at best. This shows that stereo eye-tracking may be an option if reliable calibration is not possible, but the applied eye-model should account for the actual optics of the cornea...
February 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28269489/eye-movements-as-a-marker-for-visual-prosthesis-spatial-mapping-a-feasibility-study-using-a-blind-patient-implanted-with-the-argus-ii-retinal-prosthesis
#11
Avi Caspi, Jessy Dorn, John B Helder, Kapil D Katyal, Arup Roy
Spatial mapping, the location in space of a perceived location due to an implanted electrode's electrical stimulation is important in the design of visual prostheses. Generally, a visual prosthesis system consists of an implanted electrode array, an external camera that acquires the image, and a transmitter that sends the information to the implanted electrodes. In cortical visual implant, the layout of the implanted array in most cases does not match the retinotopic map and it is necessary to find the location of the percept of each electrode in world coordinates...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268099/frequency-of-testing-to-detect-visual-field-progression-derived-using-a-longitudinal-cohort-of-glaucoma-patients
#12
Zhichao Wu, Luke J Saunders, Fábio B Daga, Alberto Diniz-Filho, Felipe A Medeiros
PURPOSE: To determine the time required to detect statistically significant progression for different rates of visual field loss using standard automated perimetry (SAP) when considering different frequencies of testing using a follow-up scheme that resembles clinical practice. DESIGN: Observational cohort study. PARTICIPANTS: One thousand seventy-two eyes of 665 patients with glaucoma followed up over an average of 4.3±0.9 years. METHODS: Participants with 5 or more visual field tests over a 2- to 5-year period were included to derive the longitudinal measurement variability of SAP mean deviation (MD) using linear regressions...
March 4, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28264130/a-new-matrix-therapy-agent-for-faster-corneal-healing-and-less-ocular-discomfort-following-epi-off-accelerated-corneal-cross-linking-in-progressive-keratoconus
#13
Koray Gumus, Marta Gomes Guerra, Sara Homem de Melo Marques, Sarper Karaküçük, Denis Barritault
PURPOSE: To investigate the hypothesis that a new matrix therapy agent (ReGeneraTing Agent, [RGTA]) would speed up the corneal reepithelialization, improve stromal healing, and reduce ocular symptoms after epi-off corneal cross-linking (CXL). METHODS: Sixty eyes of 60 patients with progressive keratoconus were enrolled in the study. Epi-off accelerated CXL was performed in all patients. Sixty eyes were randomized into two groups according to use of RGTA eye drops prior to contact lens fitting at the end...
March 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28264098/intravitreally-injected-fluid-dispersion-importance-of-injection-technique
#14
Koen Willekens, Geert Reyns, Marjan Diricx, Marc Vanhove, Bernard Noppen, Walter Coudyzer, Yicheng Ni, Jean H M Feyen, Peter Stalmans
Purpose: The purpose of this study was to evaluate the dispersion of intravitreally injected solutions and investigate the influence of varying injection techniques. Methods: This was a prospective study using enucleated porcine eyes and ultra-high-resolution computed tomography (UHRCT) scanning to visualize iomeprol intravitreal dispersion. Sixty eyes were divided over 12 different groups according to the injection procedure: fast (2 seconds) or slow (10 seconds) injection speed and needle tip location (6- and 12-mm needle shaft insertion or premacular tip placement verified by indirect ophthalmoscopy)...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28252388/three-dimensional-segmentation-of-the-ex-vivo-anterior-lamina-cribrosa-from-second-harmonic-imaging-microscopy
#15
Sundaresh Ram, Forest Danford, Stephen Howerton, Jeffrey Rodriguez, Jonathan Vande Geest
The lamina cribrosa (LC) 1 is a connective tissue in the posterior eye with a complex mesh-like trabecular microstructure through which all the retinal ganglion cell axons and central retinal vessels pass. Recent studies have demonstrated that changes in the structure of the LC correlate with glaucomatous damage. Thus, accurate segmentation and reconstruction of the LC is of utmost importance. This paper presents a new automated method for segmenting the microstructure of the anterior LC in the images obtained via multiphoton microscopy using a combination of ideas...
February 23, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28245005/-factors-affecting-exposure-level-for-medical-staff-during-orthopedic-procedures-under-fluoroscopic-control
#16
Maria A Staniszewska, Renata Kopeć, Maciej Budzanowski, Edyta Owsiak
BACKGROUND: Extended control of staff exposure in interventional radiology has been legally required over the last few years. This is determined by a number of factors, including the type of procedure, technical conditions and methodology. In orthopedic procedures fluoroscopy is used to control surgical reconstructions. An influence of particular factors on the registered values of doses received by the members of medical team performing osteosynthesis for limb fractures is presented in this paper...
February 28, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28239777/-limbal-epithelial-stem-cell-transplantation-current-state-and-perspectives
#17
D Meller, H Thomasen
Homeostasis of the corneal surface is maintained by epithelial stem cells localized in the limbus. Multiple intrinsic factors or external injuries can destroy the delicate microenvironment of limbal epithelial stem cells causing a state which is termed limbal stem cell deficiency (LSCD). In such cases, re-epithelialization of the cornea is drastically impeded and conjunctival epithelium starts to extend beyond the limbus and to invade the corneal surface. In partial LSCD, a superficial keratectomy combined with an amniotic membrane is advised and helpful to restore an intact, healthy ocular surface...
February 26, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28227741/eye-movements-as-a-marker-for-visual-prosthesis-spatial-mapping-a-feasibility-study-using-a-blind-patient-implanted-with-the-argus-ii-retinal-prosthesis
#18
Avi Caspi, Jessy Dorn, John B Helder, Kapil D Katyal, Arup Roy, Avi Caspi, Jessy Dorn, John B Helder, Kapil D Katyal, Arup Roy, John B Helder, Kapil D Katyal, Jessy Dorn, Arup Roy, Avi Caspi
Spatial mapping, the location in space of a perceived location due to an implanted electrode's electrical stimulation is important in the design of visual prostheses. Generally, a visual prosthesis system consists of an implanted electrode array, an external camera that acquires the image, and a transmitter that sends the information to the implanted electrodes. In cortical visual implant, the layout of the implanted array in most cases does not match the retinotopic map and it is necessary to find the location of the percept of each electrode in world coordinates...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226373/microvascular-flaps-in-nasal-reconstruction
#19
Irene A Kim, Kofi D O Boahene, Patrick J Byrne, Shaun C Desai
Nasal reconstruction for subtotal and total rhinectomy defects is a challenging endeavor, which requires technical finesse, a keen artistic eye, and the ability to anticipate long-term changes that accompany postoperative healing. While local and regional flaps have traditionally been utilized to reconstitute missing nasal elements, certain situations may not provide sufficient or acceptable tissue for optimal reconstruction. In these situations, the three major components of the nose-lining, structural support, and external skin-may require reconstruction with tissues harvested from distant sites through microvascular free tissue transfer...
February 2017: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28220619/the-palatal-interpterygoid-vacuities-of-temnospondyls-and-the-implications-for-the-associated-eye-and-jaw-musculature
#20
Florian Witzmann, Ingmar Werneburg
A diagnostic feature of temnospondyls is the presence of an open palate with large interpterygoid vacuities, unlike the closed palate of most other early tetrapods, in which the vacuities are either slit-like or completely absent. Attachment sites on neurocranium and palatal bones in temnospondyls allow the reconstruction of a powerful m. retractor bulbi and a large, sheet-like m. levator bulbi that formed the elastic floor of the orbit. This muscle arrangement indicates that temnospondyls were able to retract the eyeballs through the interpterygoid vacuities into the buccal cavity, like extant frogs and salamanders...
February 21, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
keyword
keyword
34657
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"