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https://www.readbyqxmd.com/read/27896803/the-effect-of-craniokinesis-on-the-middle-ear-of-domestic-chickens-gallus-gallus-domesticus
#1
Raf Claes, Pieter G G Muyshondt, Luc Van Hoorebeke, Jelle Dhaene, Joris J J Dirckx, Peter Aerts
The avian middle ear differs from that of mammalians and contains a tympanic membrane, one ossicle (bony columella and cartilaginous extra-columella), some ligaments and one muscle. The rim of the eardrum (closing the middle ear cavity) is connected to the neurocranium and, by means of a broad ligament, to the otic process of the quadrate. Due to the limited number of components in the avian middle ear, the possibilities of attenuating the conduction of sound seem to be limited to activity of the stapedius muscle...
November 29, 2016: Journal of Anatomy
https://www.readbyqxmd.com/read/27833874/effect-of-type-1-tympanoplasty-on-the-quality-of-life-of-csom-patients
#2
Khyati Bhatia, Lakshmi Vaid, H C Taneja
Chronic suppurative otitis media (CSOM) continues to be an important public health problem despite significant advances in medical science. Ear discharge, pain, discomfort, difficulty in hearing, limitation of routine activities and emotional problems due to CSOM cause a significant impact on the health and general well being of the patient. We have done Type 1 tympanoplasty in tubotympanic type of COM to reconstruct the tympanic membrane and alleviate the symptoms of the patients. This study presents an analysis of the impact of the surgery on the patient subjectively and its correlation with objective outcomes...
December 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/27809939/electrocoagulation-improving-bone-cement-use-in-middle-ear-surgery-short-term-and-middle-term-results
#3
C Galy-Bernadoy, M Akkari, M Mondain, A Uziel, F Venail
BACKGROUND: Bone cement is used for ossicular chain repair and revision stapes surgery. Its efficient use requires cautious removal of mucosa from the ossicles. This paper reports a technique for easy, fast and safe removal of this mucosa prior to cement application. It consists of the application of monopolar electrocoagulation on the ossicles prior to bone cement application. METHODS: The outcomes of six cases of revision stapes surgery and seven cases of partial ossiculoplasty, conducted between 2007 and 2012 using this new technique, were evaluated...
November 4, 2016: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/27807249/singing-whales-generate-high-levels-of-particle-motion-implications-for-acoustic-communication-and-hearing
#4
T Aran Mooney, Maxwell B Kaplan, Marc O Lammers
Acoustic signals are fundamental to animal communication, and cetaceans are often considered bioacoustic specialists. Nearly all studies of their acoustic communication focus on sound pressure measurements, overlooking the particle motion components of their communication signals. Here we characterized the levels of acoustic particle velocity (and pressure) of song produced by humpback whales. We demonstrate that whales generate acoustic fields that include significant particle velocity components that are detectable over relatively long distances sufficient to play a role in acoustic communication...
November 2016: Biology Letters
https://www.readbyqxmd.com/read/27790313/age-related-incidence-of-cervical-spondylosis-in-residents-of-jeju-island
#5
Myung-Sang Moon, Min-Geun Yoon, Bong-Keun Park, Min-Suk Park
STUDY DESIGN: Cervical spine radiograms of 460 Jeju islanders. PURPOSE: To investigate the age-matched incidences and severity of the cervical disc degeneration and associated pathologic findings. OVERVIEW OF LITERATURE: Several related studies on the incidences of disc and Luschka's and facet joint degeneration have provided some basic data for clinicians. METHODS: Cervical radiographs of 460 (220 males and 240 females) patients in their fourth to ninth decade were analyzed...
October 2016: Asian Spine Journal
https://www.readbyqxmd.com/read/27755357/cochleariform-process-abutment-on-tbct-in-early-congenital-cholesteatoma
#6
Chang Ho Lee, So Young Kim, Hyoung-Mi Kim, Young Ju Kim, Ji Yoon Kim, Mi Kyung Kim
OBJECTIVES: To study the influence of the cochleariform process abutment (CPA) of early congenital cholesteatomas (CC) (ECCs) on surgical outcomes. STUDY DESIGN: Retrospective case review. SETTING: University hospital otology referral clinic. PATIENTS: Two hundred consecutive pediatric ECC patients. INTERVENTIONS: The patients were classified into three groups based on the temporal bone computed tomography (TBCT) findings of ECC: A) the absence of CPA, B) the presence of CPA, and C) the presence of CPA and extension posterior to the malleus handle...
October 12, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27752406/apophysitis-of-the-tibial-tuberosity-osgood-schlatter-disease-a-review
#7
Raju Vaishya, Ahmad Tariq Azizi, Amit Kumar Agarwal, Vipul Vijay
Osgood-Schlatter disease (OSD) is a condition in which the patellar tendon insertion on the tibial tuberosity becomes inflamed. It is a well-known condition in late childhood characterized by pain and a bony prominence over the tibial tuberosity. The pain is usually exacerbated by physical activities like running, jumping, and climbing stairs. In the acute stage, the margins of the patellar tendon become blurred in radiographs due to the soft tissue swelling. After three to four months, bone fragmentation at the tibial tuberosity is viewed...
September 13, 2016: Curēus
https://www.readbyqxmd.com/read/27748341/minimally-invasive-cochlear-implantation-assisted-by-bi-planar-device-an-exploratory-feasibility-study-in-vitro
#8
Jia Ke, Shao-Xing Zhang, Lei Hu, Chang-Sheng Li, Yun-Feng Zhu, Shi-Long Sun, Li-Feng Wang, Fu-Rong Ma
BACKGROUND: A single drilled tunnel from the lateral mastoid cortex to the cochlea via the facial recess is essential for minimally invasive cochlear implant surgery. This study aimed to explore the safety profile of this kind of new image-guided and bi-planar device-assisted surgery procedure in vitro. METHODS: Image-guided minimally invasive cochlear implantations were performed on eight cadaveric temporal bone specimens. The main procedures were: (1) temporal bone specimens were prepared for surgery and fiducial markers were registered...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27690307/ossicular-bone-damage-and-hearing-loss-in-rheumatoid-arthritis-a-correlated-functional-and-high-resolution-morphometric-study-in-collagen-induced-arthritic-mice
#9
Rensa Chen, Martin Schwander, Mary F Barbe, Marion M Chan
Globally, a body of comparative case-control studies suggests that rheumatoid arthritis (RA) patients are more prone to developing hearing loss (HL). However, experimental evidence that supports this hypothesis is still lacking because the human auditory organ is not readily accessible. The aim of this study was to determine the association between bone damage to the ossicles of the middle ear and HL, using a widely accepted murine model of collagen-induced arthritis (RA mice). Diarthrodial joints in the middle ear were examined with microcomputer tomography (microCT), and hearing function was assessed by auditory brainstem response (ABR)...
2016: PloS One
https://www.readbyqxmd.com/read/27671791/viable-ednra-y129f-mice-feature-human-mandibulofacial-dysostosis-with-alopecia-mfda-syndrome-due-to-the-homologue-mutation
#10
Sibylle Sabrautzki, Michael A Sandholzer, Bettina Lorenz-Depiereux, Robert Brommage, Gerhard Przemeck, Ingrid L Vargas Panesso, Alexandra Vernaleken, Lillian Garrett, Katharina Baron, Ali O Yildirim, Jan Rozman, Birgit Rathkolb, Christine Gau, Wolfgang Hans, Sabine M Hoelter, Susan Marschall, Claudia Stoeger, Lore Becker, Helmut Fuchs, Valerie Gailus-Durner, Martin Klingenspor, Thomas Klopstock, Christoph Lengger, Leuchtenberger Stefanie, Eckhard Wolf, Tim M Strom, Wolfgang Wurst, Martin Hrabě de Angelis
Animal models resembling human mutations are valuable tools to research the features of complex human craniofacial syndromes. This is the first report on a viable dominant mouse model carrying a non-synonymous sequence variation within the endothelin receptor type A gene (Ednra c.386A>T, p.Tyr129Phe) derived by an ENU mutagenesis program. The identical amino acid substitution was reported recently as disease causing in three individuals with the mandibulofacial dysostosis with alopecia (MFDA, OMIM 616367) syndrome...
December 2016: Mammalian Genome: Official Journal of the International Mammalian Genome Society
https://www.readbyqxmd.com/read/27671643/morphology-and-function-of-neandertal-and-modern-human-ear-ossicles
#11
Alexander Stoessel, Romain David, Philipp Gunz, Tobias Schmidt, Fred Spoor, Jean-Jacques Hublin
The diminutive middle ear ossicles (malleus, incus, stapes) housed in the tympanic cavity of the temporal bone play an important role in audition. The few known ossicles of Neandertals are distinctly different from those of anatomically modern humans (AMHs), despite the close relationship between both human species. Although not mutually exclusive, these differences may affect hearing capacity or could reflect covariation with the surrounding temporal bone. Until now, detailed comparisons were hampered by the small sample of Neandertal ossicles and the unavailability of methods combining analyses of ossicles with surrounding structures...
October 11, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27664768/gene-expression-analysis-during-the-induction-and-patterning-of-the-conjunctival-papillae-in-the-chick-embryonic-eye
#12
Karyn Jourdeuil, Tamara Anne Franz-Odendaal
The induction and patterning of the conjunctival papillae (i.e. epithelial thickenings of the conjunctiva required for the induction of the underlying, neural crest-derived scleral ossicles) is complex. It takes place over a period of two days and follows a defined spatiotemporal sequence. In this study, we investigated the spatial and temporal expression pattern of four genes over seven morphological stages of development of these papillae. We show that β-catenin is expressed during the pre-patterning of the epithelium prior to papilla induction and second that β-catenin, Ednrb and Inhba are expressed during the induction and patterning of the conjunctival papillae...
September 2016: Gene Expression Patterns: GEP
https://www.readbyqxmd.com/read/27663221/ossiculoplasty-in-chronic-otitis-media-surgical-results-and-prognostic-factors-of-surgical-success
#13
Ana Castro Sousa, Vânia Henriques, Jorge Rodrigues, Rui Fonseca
BACKGROUND AND OBJECTIVES: The goal of ossiculoplasty is to improve hearing. Successful ossiculoplasty depends on several factors. This retrospective study was carried out to analyze hearing results of ossiculoplasty in ears with chronic otitis media (COM) and evaluate clinical outcomes and factors predictive of hearing improvement. SUBJECTS AND METHODS: We reviewed the results of 153 patients with COM (with cholesteatoma (COMC) and without cholesteatoma (COMWC)) who underwent ossiculoplasty between January of 2002 to December of 2011...
September 20, 2016: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/27649402/the-rare-lesser-metatarsal-bipartite-sesamoid-a-case-report-and-literature-review
#14
Christopher R Hood, Stephanie Eldridge, Matthew Tran, Jason R Miller
INTRODUCTION AND OBJECTIVES: There are several various accessory ossicles and sesamoid bones that can be seen throughout the foot and ankle, with reported incidence of 21.2% and 9.6%, respectively. Accessory ossicles and sesamoid bones usually remain asymptomatic until an inciting event (trauma, overuse) occurs and can then cause pain or degenerative changes. They can also be found in routine imaging. One of these confusing findings are lesser metatarsal sesamoids, which are a rare occurrence...
September 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/27614443/quantitative-assessment-of-surgical-anatomy-and-three-dimensional-relationships-in-the-supralabyrinthine-space
#15
Yusu Ni, Kaishi Wang, Yi Jiang, Ren Zhou, Yan Sha, Huawei Li
OBJECTIVE: To explore and quantify the surgically relevant anatomic relationships and three-dimensional (3D) morphology of the supralabyrinthine space, and enable a deeper, clearer understanding of its regional anatomy. MATERIALS AND METHODS: 3D-DOCTOR software was used to create a 3D reconstruction of the axial CT images and multiplanar reformatting of 55 slices of temporal bone in 29 patients (17 males and 12 females), whose average age was 38.69 ± 17.81 years...
September 10, 2016: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/27591576/finite-element-modelling-of-sound-transmission-from-outer-to-inner-ear
#16
Bruno Areias, Carla Santos, Renato M Natal Jorge, Fernanda Gentil, Marco Pl Parente
The ear is one of the most complex organs in the human body. Sound is a sequence of pressure waves, which propagates through a compressible media such as air. The pinna concentrates the sound waves into the external auditory meatus. In this canal, the sound is conducted to the tympanic membrane. The tympanic membrane transforms the pressure variations into mechanical displacements, which are then transmitted to the ossicles. The vibration of the stapes footplate creates pressure waves in the fluid inside the cochlea; these pressure waves stimulate the hair cells, generating electrical signals which are sent to the brain through the cochlear nerve, where they are decoded...
September 2, 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/27589966/an-observational-prospective-study-to-evaluate-the-preoperative-planning-tool-ci-wizard-for-cochlear-implant-surgery
#17
Markus Pirlich, Mary Tittmann, Daniela Franz, Andreas Dietz, Mathias Hofer
"CI-Wizard" is a new, three-dimensional software planning tool for cochlear implant surgery with manual and semi-automatic algorithms to visualize anatomical risk structures of the lateral skull base preoperatively. Primary endpoints of the study represented the evaluation of the CI-Wizards usability, accuracy, subjectively perceived and objectively measured time in clinical practice. In a period from January 2014 to March 2015, n = 36 participants were included in this study. These members were divided into three groups of equal number (n = 12), but different level of experience...
September 2, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27563341/resolving-the-evolution-of-the-mammalian-middle-ear-using-bayesian-inference
#18
Héctor E Ramírez-Chaves, Vera Weisbecker, Stephen Wroe, Matthew J Phillips
BACKGROUND: The minute, finely-tuned ear ossicles of mammals arose through a spectacular evolutionary transformation from their origins as a load-bearing jaw joint. This involved detachment from the postdentary trough of the mandible, and final separation from the dentary through resorption of Meckel's cartilage. Recent parsimony analyses of modern and fossil mammals imply up to seven independent postdentary trough losses or even reversals, which is unexpected given the complexity of these transformations...
2016: Frontiers in Zoology
https://www.readbyqxmd.com/read/27538760/implantation-of-stromal-vascular-fraction-progenitors-at-bone-fracture-sites-from-a-rat-model-to-a-first-in-man-study
#19
Franziska Saxer, Arnaud Scherberich, Atanas Todorov, Patrick Studer, Sylvie Miot, Simone Schreiner, Sinan Güven, Laurent A H Tchang, Martin Haug, Michael Heberer, Dirk J Schaefer, Daniel Rikli, Ivan Martin, Marcel Jakob
Stromal Vascular Fraction (SVF) cells freshly isolated from adipose tissue include osteogenic- and vascular-progenitors, yet their relevance in bone fracture healing is currently unknown. Here, we investigated whether human SVF cells directly contribute to the repair of experimental fractures in nude rats, and explored the feasibility/safety of their clinical use for augmentation of upper arm fractures in elderly individuals. Human SVF cells were loaded onto ceramic granules within fibrin gel and implanted in critical nude rat femoral fractures after locking-plate osteosynthesis, with cell-free grafts as control...
August 19, 2016: Stem Cells
https://www.readbyqxmd.com/read/27528610/comparison-of-the-modified-brostr%C3%A3-m-procedure-for-chronic-lateral-ankle-instability-with-and-without-subfibular-ossicle
#20
Hyeon-Wook Ahn, Keun-Bae Lee
BACKGROUND: Subfibular ossicles are frequently found in patients with chronic lateral ankle instability (CLAI). However, there is a lack of consensus about the optimal surgical treatment for CLAI with subfibular ossicle. PURPOSE: To evaluate the clinical and radiographic outcomes of the modified Broström procedure with subfibular ossicle excision compared with the same procedure for CLAI without subfibular ossicle. STUDY DESIGN: Cohort study; Level of evidence, 3...
December 2016: American Journal of Sports Medicine
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