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https://www.readbyqxmd.com/read/28621462/evidence-for-convergent-evolution-of-a-neocortex-like-structure-in-a-late-permian-therapsid
#1
Michael Laaß, Anders Kaestner
The special sensory, motor, and cognitive capabilities of mammals mainly depend upon the neocortex, which is the six-layered cover of the mammalian forebrain. The origin of the neocortex is still controversial and the current view is that larger brains with neocortex first evolved in late Triassic Mammaliaformes. Here, we report the earliest evidence of a structure analogous to the mammalian neocortex in a forerunner of mammals, the fossorial anomodont Kawingasaurus fossilis from the late Permian of Tanzania...
June 16, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28619482/correction-of-sunken-upper-eyelid-with-orbital-fat-transposition-flap-and-dermofat-graft
#2
Won Lee, Soon-Beom Kwon, Se-Kwang Oh, Eun-Jung Yang
BACKGROUND: Sunken upper eyelid is a commonly found deformity among Asians, mostly due to the aging process and excessive orbital fat removal during oriental blepharoplasty procedures. This deformity is frequently accompanied by multiple, poorly defined upper eyelid folds and blepharoptosis. To date, autologous fat graft has been the treatment of choice for this group of patients. However, accurate placement of the graft in the orbital fat is quite challenging, and it can result in contour irregularities when injected into the preseptal plane...
May 24, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28614155/the-role-of-the-back-plate-in-angle-anatomy-with-the-boston-type-i-keratoprosthesis
#3
Elise V Taniguchi, Eleftherios I Paschalis, Alja Crnej, Ai Ren, Kathryn A Colby, James Chodosh, Louis R Pasquale, Lucy Q Shen, Claes H Dohlman, Andrea Cruzat
PURPOSE: To quantitatively evaluate the angle anatomy in eyes with the Boston type I keratoprosthesis (B-KPro) differing in the back plate (BP) material and size using anterior segment optical coherence tomography. METHODS: B-KPro eyes with poly(methyl methacrylate) (PMMA) (7.0 and 8.5 mm) and titanium (7.0, 8.5, and 9.5 mm) BPs were imaged with anterior segment optical coherence tomography. The angle opening distance at 500 μm from the scleral spur (AOD500), trabecular iris surface area at 500 μm from the scleral spur (TISA500), and trabecular iris angle at 500 μm from the scleral spur (TIA500) were measured...
June 13, 2017: Cornea
https://www.readbyqxmd.com/read/28613427/clinical-anatomy-of-the-anterior-chamber-angle-in-congenital-aniridia-and-consequences-for-trabeculotomy-cyclophotocoagulation
#4
Arne Viestenz, Berthold Seitz, Eva Deland, Miltiadis Fiorentzis, Lorenz Latta, Anja Viestenz, Barbara Käsmann-Kellner
INTRODUCTION: Intraocular pressure (IOP) lowering surgery in congenital aniridia glaucoma (CAG) can be complicated by dysgenesis of the limbal region, anterior chamber angle, iris and lens. METHODS: The anterior segments of 23 eyes (17 patients) with congenital aniridia were investigated under general anesthesia using ultrasound biomicroscopy (UBM). The structures of the anterior segment were examined: distance of ciliary body processes from the anterior chamber angle and positioning of Schlemm's canal...
June 14, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28612422/tenonplasty-for-closing-defects-during-sclerocorneal-surgery-a-brief-review-of-its-anatomy-and-clinical-applications
#5
Fabian N Fries, Shady Suffo, Loay Daas, Berthold Seitz, Miltiadis Fiorentzis, Arne Viestenz
PURPOSE: To provide insight into the clinical anatomy of Tenon's capsule and to describe a technique to manage sclerocorneal defects using autologous Tenon's tissue. METHODS: A thin layer of Tenon's capsule harvested from the patient's own eye is used to seal the defect and act as a scaffold. The Tenon's flap is spread over the defect and held in place by Vicryl sutures. A bandage contact lens is then placed on the eye. RESULTS: Tenon's capsule is composed of thick fibrous tissue with smooth muscle fibers and a thin posterior capsule of orbital fat...
June 13, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28611650/anterior-360%C3%A2-synechiolysis-in-a-case-of-late-iridocorneal-adhesions-after-25-g-vitrectomy-surgical-and-physiopathogenetic-aspects
#6
Raffaele Nuzzi, Francesca Monteu
We describe the case of an 86-year-old patient, pseudophakic in both eyes and with high myopia, who had previously had a 25-G vitrectomy with 20% C3F8 used as a tamponade due to a total retinal detachment with choroidal hemorrhages and macular hole. At the postoperative 4-month follow-up, we found 360° iridocorneal synechiae with elevated intraocular pressure due to angle closure in all sectors, with an adherent retina and in the absence of choroidal hemorrhage/detachment and of corneal edema or endothelial damage...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28606113/magnetic-resonance-imaging-and-computed-tomography-as-tools-for-the-investigation-of-sperm-whale-physeter-macrocephalus-teeth-and-eye
#7
Aage Kristian Olsen Alstrup, Ole Lajord Munk, Trine Hammer Jensen, Lasse Fast Jensen, Abdi Hedayat, Brian Hansen
BACKGROUND: Scanning techniques such as magnetic resonance imaging (MRI) and computed tomography (CT) are useful tools in veterinary and human medicine. Here we demonstrate the usefulness of these techniques in the study of the anatomy of wild marine mammals as part of a necropsy. MRI and CT scans of sperm whale teeth (n = 4) were performed. The methods were compared and further compared to current standard methods for evaluation of tooth layering. For MRI a zero echo time sequence was used, as previously done for imaging of intact human teeth...
June 12, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28593180/surgical-management-of-spontaneous-late-onset-descemet-membrane-detachment-after-penetrating-keratoplasty-for-keratoconus-a-case-report
#8
Myrsini Petrelli, Konstantinos Oikonomakis, Konstantinos Andreanos, Andreas Mouchtouris, Ilias Georgalas, George Kymionis
BACKGROUND: To report a surgical method for treating corneal oedema in a case of late-onset Descemet membrane detachment after penetrating keratoplasty. CASE PRESENTATION: A 55-year old patient presented with sudden visual loss in his left eye 28 years after penetrating keratoplasty for keratoconus. Slit-lamp biomicroscopy revealed a distortion of the corneal graft anatomy with protrusion of the graft and peripheral thinning and steepening in the residual host tissue, accompanied by corneal graft oedema...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28574496/optical-clearing-of-the-eye-using-the-see-deep-brain-technique
#9
B Hohberger, C Baumgart, A Bergua
PurposeTissue clearing has been used in anatomy for the first time in Germany over a century ago. Neuronal tissue, like cortex, was investigated in mice using a water-based optical clearing method termed See Deep Brain (SeeDB). However, although the eye belongs to the central nervous system, this histological technique was not applied in the eye up to date. We applied SeeDB for the visualization of intraocular structures.Patients and methodsFour eyes of cornea donors (two male, two female: 73-84 years) obtained from the Cornea Bank of the Department of Ophthalmology Erlangen, four chicken eyes and two mices' optic nerve were used...
June 2, 2017: Eye
https://www.readbyqxmd.com/read/28567164/pars-plana-vitrectomy-with-internal-limiting-membrane-peeling-for-nontractional-diabetic-macular-edema
#10
Jan Niklas Ulrich
BACKGROUND: Diabetes mellitus remains the leading cause of blindness among working age Americans with diabetic macular edema being the most common cause for moderate and severe vision loss. OBJECTIVE: To investigate the anatomical and visual benefits of pars plana vitrectomy with inner limiting membrane peeling in patients with nontractional diabetic macular edema as well as correlation of integrity of outer retinal layers on spectral domain optical coherence tomography to visual outcomes...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/28542788/saturated-salt-solution-a-further-step-to-a-formaldehyde-free-embalming-method-for-veterinary-gross-anatomy
#11
M Lombardero, M M Yllera, A Costa-E-Silva, M J Oliveira, P G Ferreira
In the field of veterinary anatomy, most of the specimens used in practical sessions are perfused with fixatives. Thus, they can be used for a longer time, reducing the number of animals for educational purposes. Formalin is the most commonly used fixative, consisting of a 37% formaldehyde solution. However, formaldehyde is a powerful irritant of the eyes and airways and is considered carcinogenic, causing nasopharyngeal cancer in exposed workers and professionals. In the present study, we explored an alternative method to avoid the use of formaldehyde in specimens used for gross anatomy practical sessions...
May 24, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28541579/tailored-extended-bifrontal-craniotomy-for-anterior-skull-base-tumors-anatomic-description-of-a-modified-surgical-technique-and-case-series
#12
Michael M Safaee, Michael W McDermott, Arnau Benet, Philip V Theodosopoulos
BACKGROUND: Open transcranial approaches to the anterior skull base remain an integral component of current skull base practice. Evolution of these and other techniques has resulted in revisions of standard, tried-and-true methods in attempts to improve patient outcomes and cosmesis, while still providing the best combination of surgical exposure and ergonomics. OBJECTIVE: To describe a modified approach for midline tumors of the anterior skull base. METHODS: We describe the anatomy and techniques of a modified extended bifrontal craniotomy for anterior skull base tumors...
May 24, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28541157/isolated-medial-longitudinal-fasciculus-syndrome-review-of-imaging-anatomy-pathophysiology-and-differential-diagnosis
#13
Puneet S Kochar, Yogesh Kumar, Pranav Sharma, Vikash Kumar, Nishant Gupta, Pradeep Goyal
Isolated medial longitudinal fasciculus (MLF) syndrome due to infarction limited only to the midbrain is a rare occurrence. The MLF are a group of fiber tracts located in the paramedian area of the midbrain and pons. They control horizontal eye movements by interconnecting oculomotor and abducens nuclei in the brain stem. Such small infarcts can easily be overlooked by young neuroradiologists and trainees. In this review, we discuss the clinical and imaging characteristics, comprehensive review of the anatomy, pathophysiology, and differential diagnosis...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28540165/nanotechnology-based-strategies-for-treatment-of-ocular-disease
#14
REVIEW
Yuhua Weng, Juan Liu, Shubin Jin, Weisheng Guo, Xingjie Liang, Zhongbo Hu
Ocular diseases include various anterior and posterior segment diseases. Due to the unique anatomy and physiology of the eye, efficient ocular drug delivery is a great challenge to researchers and pharmacologists. Although there are conventional noninvasive and invasive treatments, such as eye drops, injections and implants, the current treatments either suffer from low bioavailability or severe adverse ocular effects. Alternatively, the emerging nanoscience and nanotechnology are playing an important role in the development of novel strategies for ocular disease therapy...
May 2017: Acta Pharmaceutica Sinica. B
https://www.readbyqxmd.com/read/28527653/ultrasound-biomicroscopy-measurement-of-schlemm-s-canal-in-pediatric-patients-with-and-without-glaucoma
#15
Anika Tandon, Caroline Watson, Ramesh Ayyala
PURPOSE: To compare the diameter of Schlemm's canal in children with and without congenital glaucoma as measured in vivo by means of ultrasound biomicroscopy. METHODS: In this prospective single-center study of pediatric subjects (<18 years of age) the diameter of Schlemm's canal in nonglaucomatous and glaucomatous eyes was compared. An 80 MHz iUltrasound probe (iScience Interventional Inc, Menlo Park, CA) placed near the limbus was used to identify and measure the canal's diameter with special attention to the anterior segment anatomy (especially in subjects with congenital glaucoma)...
May 18, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28520882/ocular-determinants-of-refractive-error-and-its-age-and-sex-related-variations-in-the-chinese-american-eye-study
#16
Grace M Richter, Mingwu Wang, Xuejuan Jiang, Shuang Wu, Dandan Wang, Mina Torres, Farzana Choudhury, Rohit Varma
Importance: Uncorrected refractive error (RE) is a leading cause of visual impairment, and variations in ocular anatomy determine RE. The unique ocular determinants of RE in Chinese American individuals have not been studied previously. Objective: To report ocular determinants of RE in a Chinese American population 50 years and older in Monterey Park, California. Design, Setting, and Participants: The Chinese American Eye Study, a population-based, cross-sectional study, was conducted from February 1, 2010, through October 31, 2013, in Monterey Park, with this particular data analysis performed from January 1 through December 31, 2016...
May 18, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28514515/detailed-anatomy-of-the-abducens-nerve-in-the-lateral-rectus-muscle
#17
Yong Seok Nam, In-Beom Kim, Sun Young Shin
INTRODUCTION: The aims of this study were to elucidate the detailed anatomy of the abducens nerve in the lateral rectus muscle (LRM) and the intramuscular innervation pattern using Sihler staining. MATERIALS AND METHODS: In this cohort study, 32 eyes of 16 cadavers were assessed. Dissection was performed from the LRM origin to its insertion. The following distances were measured: from LRM insertion to the bifurcation point of the abducens nerve, from LRM insertion to the entry site of the superior branch or inferior branch, from the upper border of the LRM to the entry site of the superior branch, from the lower border of LRM to the entry site of inferior branch, and the widths of the main trunk and superior and inferior branches...
May 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28509328/anatomy-based-dmek-wetlab-in-homburg-saar-novel-aspects-of-donor-preparation-and-host-maneuvers-to-teach-descemet-membrane-endothelial-keratoplasty
#18
B Seitz, L Daas, M Bischoff-Jung, N Szentmáry, S Suffo, M El-Husseiny, A Viestenz, G Milioti
INTRODUCTION: Use of Descemet Membrane Endothelial Keratoplasty (DMEK) has been limited because of problems with donor preparation, i.e. tearing of the Descemet membrane and difficulties in unfolding the Endothelium-Descemet-Membrane-Layer (EDML) in the anterior chamber (AC). The purpose of this work was to describe a novel approach to teaching anatomy-based donor and recipient preparation in a DMEK-Wetlab. MATERIAL AND METHODS: We teach successful mono-manual donor preparation of human corneas in organ culture not suitable for transplantation, including peripheral markers for orientation...
May 16, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28504201/cilia-the-sensory-antennae-in-the-eye
#19
REVIEW
Helen May-Simera, Kerstin Nagel-Wolfrum, Uwe Wolfrum
Cilia are hair-like projections found on almost all cells in the human body. Originally believed to function merely in motility, the function of solitary non-motile (primary) cilia was long overlooked. Recent research has demonstrated that primary cilia function as signalling hubs that sense environmental cues and are pivotal for organ development and function, tissue hoemoestasis, and maintenance of human health. Cilia share a common anatomy and their diverse functional features are achieved by evolutionarily conserved functional modules, organized into sub-compartments...
May 11, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28495033/clinical-applications-of-3-dimensional-printing-in-radiation-therapy
#20
Yizhou Zhao, Kathryn Moran, Mammo Yewondwossen, James Allan, Scott Clarke, Murali Rajaraman, Derek Wilke, Paul Joseph, James L Robar
Three-dimensional (3D) printing is suitable for the fabrication of complex radiotherapy bolus. Although investigated from dosimetric and feasibility standpoints, there are few reports to date of its use for actual patient treatment. This study illustrates the versatile applications of 3D printing in clinical radiation oncology through a selection of patient cases, namely, to create bolus for photon and modulated electron radiotherapy (MERT), as well as applicators for surface high-dose rate (HDR) brachytherapy...
July 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
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