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https://www.readbyqxmd.com/read/27900329/postinsertional-cable-movements-of-cochlear-implant-electrodes-and-their-effects-on-intracochlear-pressure
#1
I Todt, D Karimi, J Luger, A Ernst, P Mittmann
Introduction. To achieve a functional atraumatic cochlear implantation, intracochlear pressure changes during the procedure should be minimized. Postinsertional cable movements are assumed to induce intracochlear pressure changes. The aim of this study was to observe intracochlear pressure changes due to postinsertional cable movements. Materials and Methods. Intracochlear pressure changes were recorded in a cochlear model with a micro-pressure sensor positioned in the apical region of the cochlea model to follow the maximum amplitude and pressure gain velocity in intracochlear pressure...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27899889/anodal-tdcs-to-right-dorsolateral-prefrontal-cortex-facilitates-performance-for-novice-jazz-improvisers-but-hinders-experts
#2
David S Rosen, Brian Erickson, Youngmoo E Kim, Daniel Mirman, Roy H Hamilton, John Kounios
Research on creative cognition reveals a fundamental disagreement about the nature of creative thought, specifically, whether it is primarily based on automatic, associative (Type-1) or executive, controlled (Type-2) processes. We hypothesized that Type-1 and Type-2 processes make differential contributions to creative production that depend on domain expertise. We tested this hypothesis with jazz pianists whose expertise was indexed by the number of public performances given. Previous fMRI studies of musical improvisation have reported that domain expertise is characterized by deactivation of the right-dorsolateral prefrontal cortex (r-DLPFC), a brain area associated with Type-2 executive processing...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27895000/severe-acute-otitis-media-and-acute-mastoiditis-in-adults
#3
Anu Laulajainen Hongisto, Jussi Jero, Antti Markkola, Riste Saat, Antti A Aarnisalo
OBJECTIVE: To evaluate and compare clinical and microbiological findings in adults hospitalized for acute otitis media (AOM) or mastoid infections (acute or latent). MATERIALS AND METHODS: We retrospectively reviewed the medical records of all adults (≥17 years old) hospitalized (between 2003 and 2012) at a tertiary referral center for acute mastoid infections or AOM not responding to outpatient medical treatment. RESULTS: Of the 160 patients in the study sample, 19% had an infection caused by S...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27890320/trepanation-in-the-late-bronze-age-and-early-iron-age-in-armenia
#4
A Yu Khudaverdyan
In this study, trepanations in ancient Armenia are discussed. In total, 10 cases were studied. Seven were male, 1 female and 2 were children. Age of the individuals ranged from 6 to 65 years. Among nine cases of surgical trepanations four had possible healing signs. In these cases the individuals showed evidence of previous trauma to the skull or infection (mastoiditis, tuberculosis), suggesting that the operation had been carried out for therapeutic purposes. This provides further support for the suggestion that trepanation (or trephination) was performed primarily for therapeutic purposes, and because of cranial infection or injury...
October 4, 2016: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/27884592/nasopharyngeal-carcinoma-with-mastoid-recurrence-after-concurrent-chemoradiotherapy-masquerading-as-acute-otomastoiditis
#5
Chih-Yu Hu, Shiang-Fu Huang, Wan-Ling Ho, Wen-Yu Chuang, Kai-Chieh Chan
Nasopharyngeal cancer (NPC) with mastoid recurrence is extraordinarily rare, and its development is thought to involve the Eustachian tube. We herein report a case of NPC with mastoid recurrence masquerading as acute otomastoiditis with facial paralysis in a 60-year-old man 44 months after concurrent chemoradiotherapy. The diagnosis was confirmed by exploratory tympanomastoidectomy with biopsy and Epstein-Barr-encoding region (EBER) in situ hybridization. Distant liver metastasis was detected simultaneously, and the patient underwent salvage treatment...
November 21, 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27883982/exocranial-surfaces-for-sex-assessment-of-the-human-cranium
#6
Barbora Musilová, Ján Dupej, Jana Velemínská, Kathia Chaumoitre, Jaroslav Bruzek
Determination of sex is one of the most important and challenging disciplines in biological anthropology. Creating a robust tool for sexing crania is crucial for forensic anthropology, especially in this period of migration, travel, and globalization, when different populations are mixed together in one region. Many different approaches to sex estimation using the skull have been published; however, population specificity and oscillation of variable sexual dimorphism typically reduces their effectiveness. The aim of this study was to create a robust classifier using virtual anthropology without the use of a CT scanner...
November 11, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27879558/impact-of-pneumococcal-conjugate-vaccines-on-selected-head-and-neck-infections-in-hospitalized-israeli-children
#7
Tal Marom, Shiran Bookstein Peretz, Orna Schwartz, Abraham Goldfarb, Yahav Oron, Sharon Ovnat Tamir
INTRODUCTION: Streptococcus pneumoniae is a major pathogen of pediatric head and neck infections (HNIs), e.g. acute otitis media (AOM), acute mastoiditis (AM), acute bacterial sinusitis (ABS) and meningitis. The aim of the study was to characterize the epidemiology of pneumococcal HNIs (pHNIs) before, during, and after the introduction of pneumococcal conjugate vaccines (PCVs). METHODS: Children 0-16 years who were hospitalized with HNIs in the Pediatrics Department in a general hospital between 1/1/2007-12/31/2014 were retrospectively identified...
November 22, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27875773/bereitschaftspotential-preceding-spontaneous-and-voluntary-eyelid-blinks-in-normal-individuals
#8
Isabella Araujo Mota, Otávio Gomes Lins
OBJECTIVE: To investigate the Bereitschaftspotential (BP) preceding spontaneous and voluntary eyelid blinks in normal subjects. METHODS: Eighteen healthy individuals (10 female) between 17 and 60years (mean 35) were studied. The EEG was recorded from 11 scalp positions of the 10-20 international electrode placement system referenced to linked mastoids. The vertical electrooculogram (VEOG) was recorded from two electrodes positioned above and below the right eye...
October 28, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27863636/the-effect-of-propofol-infusion-with-topical-epinephrine-on-cochlear-blood-flow-and-hearing-an-experimental-study
#9
Chul Ho Jang, Yong Beom Cho, Jun Sik Lee, Geun Hyung Kim, Won-Kyo Jung, Sok Cheon Pak
BACKGROUND AND OBJECTIVE: Propofol is the most commonly used intravenous (IV) anesthetic agent and is associated with hypotension upon induction of anesthesia. Intravenous propofol infusion has several properties that may be beneficial to patients undergoing middle ear surgery. Topical application of concentrated epinephrine is a valuable tool for achieving hemostasis in the middle ear and during mastoid surgery. The purpose of the present study was to determine the effects of propofol infusion with topical epinephrine on cochlear blood flow (CBF) and hearing in rats...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27863635/cochlear-implantation-of-solid-organ-transplant-patients-receiving-immunosuppressive-therapy
#10
Bushra Ayub, Nancy M Young
OBJECTIVE: To evaluate the incidence of infectious complications and healing problems in cochlear implant (CI) patients receiving immunosuppressive therapy following solid organ transplant. STUDY DESIGN: IRB-approved retrospective chart review of implanted patients. SETTING: Tertiary care children's hospital. METHODS: Seven patients of the more than 1000 implanted during the time period between 1991 and 2014 underwent cochlear implantation while on immunosuppressive therapy after having received a solid organ transplant...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27863632/soft-wall-reconstruction-of-the-canal-wall-with-retrograde-bone-work-for-pediatric-cholesteatoma-long-term-results
#11
Miyako Hatano, Makoto Ito, Hisashi Sugimoto, Masao Noda, Hiroki Hasegawa, Tomokazu Yoshizaki
OBJECTIVE: To retrospectively evaluate the long-term results of surgery for retrograde bone work, using soft-wall reconstruction of the canal wall, for pediatric cholesteatoma. METHODS: We retrospectively evaluated a series of 25 consecutive ears of 24 patients who were ≤16 years of age. All children underwent cholesteatoma surgery between October 2002 and August 2008. The type of cholesteatoma, the length of follow-up, the incidence of residual and recurrent cholesteatoma, postoperative hearing results, and the form of the reconstructed external canal wall and tympanic membrane were assessed...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27861251/fast-click-rate-electrocochleography-and-auditory-brainstem-response-in-normal-hearing-adults-using-continuous-loop-averaging-deconvolution
#12
Wafaa A Kaf, Kelly M Lewis, Erdem Yavuz, Samantha M Dixon, Mark Van Ess, Abdullah M Jamos, Rafael E Delgado
OBJECTIVES: Using the continuous loop averaging deconvolution (CLAD) technique for conventional electrocochleography (ECochG) and auditory brainstem response (ABR) recordings, the effects of testing at high stimulus rates may have the potential to diagnose disorders of the inner ear and auditory nerve. First, a body of normative data using the CLAD technique must be established. DESIGN: Extratympanic click ECochG and ABR to seven stimulus rates using CLAD were measured simultaneously from a tympanic membrane electrode and surface electrodes on the forehead and mastoid of 42 healthy individuals...
November 16, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27860393/dura-and-sinus-compression-with-a-transcutaneous-bone-conduction-device-hearing-outcomes-and-safety-in-38-patients
#13
E Vyskocil, D Riss, C Arnoldner, J S Hamzavi, R Liepins, A Kaider, C Honeder, J Fumicz, W Gstöttner, W D Baumgartner
In 2011 a bone conduction implant that utilizes electromagnetic signals transmitted through the skin instead of vibrations was introduced onto the market. The implantable portion (the bone conduction floating mass transducer, or BC-FMT) is an electromagnetic transducer that is fixed to the skull bone with screws and delivers mechanical vibrations to the inner ear (1) . It is often not possible to place the relatively large BC-FMT (15.8 mm in diameter and 8.7 mm in height) exclusively in the bone of the mastoid...
November 12, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27844410/the-great-mimicker-metastatic-breast-carcinoma-to-the-head-and-neck-with-emphasis-on-unusual-clinical-and-pathologic-features
#14
Dikson Dibe Gondim, Rebecca Chernock, Samir El-Mofty, James S Lewis
Distant metastases are relatively common in breast cancer, but spread to the head and neck region is uncommon and can be diagnostically challenging. Pathology databases of two academic hospitals were searched for patients. The diagnoses were by morphologic comparison with the primary breast specimen (when available) or through the use of immunohistochemical stains characteristic of breast carcinoma (cytokeratin 7, mammaglobin, GCDFP15, and/or GATA3 positive-excluding new primary tumors at the respective head and neck sites)...
November 14, 2016: Head and Neck Pathology
https://www.readbyqxmd.com/read/27834169/persistent-fever-with-chills-and-an-endocardial-mass-in-a-child-an-unusual-presentation-of-hughes-stovin-syndrome
#15
Marianna Fabi, Francesca Lami, Maurizio Zompatori
A 12-year-old boy with a right atrium endocardial mass was initially diagnosed as having Lemierre's syndrome on the basis of previous mastoiditis and jugular vein and cerebral venous thrombosis. Lack of response to antibiotics, persistent high fever with chills, acute-phase reactants, and peripheral arterial pseudoaneurysms made us reconsider the diagnosis. Only after the late appearance of radiological pulmonary lesions and recognition of pulmonary artery aneurysms, Hughes-Stovin syndrome was diagnosed. Hughes-Stovin syndrome is an exceedingly rare vasculitis, especially in childhood, consisting of multiple pulmonary artery aneurysms and deep venous thromboses...
November 11, 2016: Cardiology in the Young
https://www.readbyqxmd.com/read/27833868/evaluation-of-role-of-mastoid-surgery-in-the-management-of-safe-chronic-suppurative-otitis-media
#16
Akriti Sharma, Nitish Baisakhiya, L N Garg, Gurchand Singh
This study evaluates the outcome of type 1 tympanoplasty with and with out mastoidectomy. The comparative study comprises of 40 patients with CSOM safe type in dry ear. All cases were operated during a period of one and a half years. 20 of these cases were selected for tympanoplasty alone (Group A) and 20 cases were selected for Tympanoplasty with cortical mastoidectomy (Group B). Patients were reviewed after 3 weeks for inspection of the operated ear. The second and third postoperative reviews were done 6 and 12 weeks respectively for clinical assessment of the operated ear with respect to graft status, ear discharge and hearing improvement...
December 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/27833862/otological-manifestations-of-nonseptic-lateral-sinus-thrombosis-a-review
#17
M S Vijayashree, B Viswanatha
Nonseptic lateral sinus thrombosis differs from septic lateral sinus thrombosis in that it is not associated with ear or sinus infection. Etiologies of these conditions are different and management of these conditions are different. Nonseptic lateral sinus thrombosis requires medical line of management and anticoagulant therapy where as septic lateral sinus thrombosis treatment involves surgical exploration of the mastoid cavity, sinus decompression, and long-term antibiotic therapy. Mastoid changes are frequently detected on computed tomography or magnetic resonance imaging in cases of nonseptic lateral sinus thrombosis...
December 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/27833713/extensive-cervicomediastinal-emphysema-from-mastoid-injury
#18
Yasmina Ahmed, Matthew Ng
Traumatic cervicomediastinal emphysema resulting from isolated head trauma is a rare occurrence. Herein, we describe a patient who sustained a closed mastoid injury after being struck with a batted baseball, resulting in acute extensive cervicomediastinal emphysema. Upon further assessment, the patient's aerodigestive tract was determined to have remained intact and unaffected by the injury. The source of soft-tissue air originated from the fractured mastoid. This case demonstrates the protective properties of a well-pneumatized mastoid...
November 2016: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/27830877/the-prevalence-and-morphometric-features-of-mastoid-emissary-vein-on-multidedector-computed-tomography
#19
Gulen Demirpolat, Erdogan Bulbul, Bahar Yanık
BACKGROUND: To evaluate the prevalence and morphometric features of mastoid emissary vein (MEV) on multidedector computed tomography (MDCT) scans, emphasize its clinical significance and review its surgical implications. MATERIALS AND METHODS: Cranial and temporal bone MDCTs of 248 patients (496 sides) were analyzed by two radiologists. Mastoid foramen (MF) was defined on the 3 dimensional volume rendered (3DVR) images. The MF and mastoid emissary canal (MEC) were investigated in axial thin slices and the diameters of the largest MF and MEC were measured...
November 10, 2016: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/27830489/in-vivo-electrical-impedance-measurement-in-mastoid-bone
#20
Thomas Wyss Balmer, Juan Ansó, Enric Muntane, Kate Gavaghan, Stefan Weber, Andreas Stahel, Philippe Büchler
Nerve monitoring is a safety mechanism to detect the proximity between surgical instruments and important nerves during surgical bone preparation. In temporal bone, this technique is highly specific and sensitive at distances below 0.1 mm, but remains unreliable for distances above this threshold. A deeper understanding of the patient-specific bone electric properties is required to improve this range of detection. A sheep animal model has been used to characterize bone properties in vivo. Impedance measurements have been performed at low frequencies (<1 kHz) between two electrodes placed inside holes drilled into the sheep mastoid bone...
November 9, 2016: Annals of Biomedical Engineering
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