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https://www.readbyqxmd.com/read/29222730/morphology-and-morphometry-of-lacrimal-drainage-system-in-relation-to-bony-landmarks-in-caucasian-adults-a-cadaveric-study
#1
Mohammad Javed Ali, Martin Schicht, Friedrich Paulsen
PURPOSE: The objective of this study is to examine the morphometry of the lacrimal drainage system with reference to bony landmarks in the vicinity. METHODS: Twenty midsaggitalized heads obtained from sixteen preserved cadavers were studied. Measurements involved detailed morphometry of anterior and posterior lacrimal crests, bony lacrimal sac fossa, entrance and length of the bony nasolacrimal duct (NLD), attachment of Horner's muscle, and characteristics of the inferior meatal opening of the NLD...
December 8, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29218708/three-dimensional-reconstruction-of-the-cranial-and-anterior-spinal-nerves-in-early-tadpoles-of-xenopus-laevis-pipidae-anura
#2
Benjamin Naumann, Lennart Olsson
Xenopus laevis is one of the most widely used model organism in neurobiology. It is therefore surprising, that no detailed and complete description of the cranial nerves exists for this species. Using classical histological sectioning in combination with fluorescent whole mount antibody staining and micro-computed tomography we prepared a detailed innervation map and a freely-rotatable 3D model of the cranial nerves and anterior-most spinal nerves of early X. laevis tadpoles. Our results confirm earlier descriptions of the pre-otic cranial nerves and present the first detailed description of the post-otic cranial nerves...
December 8, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/29214009/the-role-of-hoxa11-and-hoxa13-in-the-evolution-of-novel-fin-morphologies-in-a-representative-batoid-leucoraja-erinacea
#3
Shannon N Barry, Karen D Crow
Background: Batoids exhibit unique body plans with derived fin morphologies, such as the anteriorly expanded pectoral fins that fuse to the head, or distally extended anterior pelvic fin lobes used for a modified swimming technique utilized by skates (Rajidae). The little skate (Leucoraja erinacea), exhibits both of these unique fin morphologies. These fin modifications are not present in a typical shark body plan, and little is known regarding the mechanisms underlying their development...
2017: EvoDevo
https://www.readbyqxmd.com/read/29212625/use-of-tricortical-iliac-crest-strut-autograft-in-comminuted-posterior-wall%C3%A2-acetabular-fractures-a-case-series
#4
Sandeep Gupta, Naveen Mittal, Jagandeep Singh Virk
PURPOSE: The results for fixation of comminuted posterior wall acetabular fractures are not very promising with reported complications in terms of osteoarthritis, nonunion and malunion which subsequently require conversion to total hip arthroplasty. The conversion to total hip arthroplasty is possible in patients over 50 years of age but not in younger patients. So this requires new methods for salvage of the native hip in young patients. METHODS: There were six patients in our series with highly comminuted posterior wall acetabular fractures where the fragments were excised and the gap filled with tricortical anterior iliac-crest strut autograft, fixed with screws and plate...
November 6, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/29206324/ahns-series-do-you-know-your-guidelines-evidence-based-management-of-oral-cavity-cancers
#5
Amarbir Gill, Nilesh Vasan, Babak Givi, Arjun Joshi
Oral cavity squamous cell carcinoma (OCSCC) is the most common nonmelanoma head and neck cancer in the world, with an estimated 405 000 new cases expected each year. Subsites of the oral cavity include the alveolar ridge, buccal mucosa, anterior tongue, tonsillar pillar, retromolar trigone, hard palate, gingiva, and floor of the mouth. In this issue of the AHNS "Do you know your guidelines?" series, we review the evidence-based approach to the management of oral cavity carcinomas based on the framework provided by the National Comprehensive Cancer Network (NCCN) Clinical Practice Guidelines in Oncology...
December 5, 2017: Head & Neck
https://www.readbyqxmd.com/read/29203574/blunt-chest-trauma-a-clinical-chameleon
#6
REVIEW
Kaveh Eghbalzadeh, Anton Sabashnikov, Mohamed Zeriouh, Yeong-Hoon Choi, Alexander C Bunck, Navid Mader, Thorsten Wahlers
The incidence of blunt chest trauma (BCT) is greater than 15% of all trauma admissions to the emergency departments worldwide and is the second leading cause of death after head injury in motor vehicle accidents. The mortality due to BCT is inhomogeneously described ranging from 9% to 60%. BCT is commonly caused by a sudden high-speed deceleration trauma to the anterior chest, leading to a compression of the thorax. All thoracic structures might be injured as a result of the trauma. Complex cardiac arrhythmia, heart murmurs, hypotension, angina-like chest pain, respiratory insufficiency or distention of the jugular veins may indicate potential cardiac injury...
December 4, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29203431/surgical-reduction-of-congenital-hip-dislocation
#7
REVIEW
C Glorion
Surgical reduction of congenital hip dislocation is technically challenging. In our practice, surgical reduction is usually reserved for patients who have failed non-operative treatment, which is the first-line strategy. However, primary surgery may be indicated if the dislocation is diagnosed late and can be performed until 8 years of age. The reduction step is crucial. It starts with painstaking exposure of the capsule. Identifying the lower part of the acetabulum is the key to accurate repositioning of the epiphysis...
December 1, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29200486/a-minimally-invasive-technique-using-a-modified-stoppa-approach-for-periacetabular-osteotomy-a-preliminary-cadaveric-study
#8
Turgut Akgul, Osman Coskun, Murat Korkmaz, Ilke Ali Gurses, Cengiz Sen, Ozcan Gayretli
Background: Developmental hip dysplasia is diagnosed when the femoral head is not sufficiently covered by the acetabulum. Anterior and lateral cover deficiency is seen, as a result a dysplastic hip joint. Various incision modifications have been developed because of the muscle dissection and wide wound scar in Smith-Peterson incision, which was originally used in Bernese osteotomy. This study evaluates applicability of the modified Stoppa approach in the performance of Bernese periacetabular osteotomy (PAO)...
November 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/29198754/divergent-connectivity-of-homologous-command-like-neurons-mediates-segment-specific-touch-responses-in-drosophila
#9
Suguru Takagi, Benjamin Thomas Cocanougher, Sawako Niki, Dohjin Miyamoto, Hiroshi Kohsaka, Hokto Kazama, Richard Doty Fetter, James William Truman, Marta Zlatic, Albert Cardona, Akinao Nose
Animals adaptively respond to a tactile stimulus by choosing an ethologically relevant behavior depending on the location of the stimuli. Here, we investigate how somatosensory inputs on different body segments are linked to distinct motor outputs in Drosophila larvae. Larvae escape by backward locomotion when touched on the head, while they crawl forward when touched on the tail. We identify a class of segmentally repeated second-order somatosensory interneurons, that we named Wave, whose activation in anterior and posterior segments elicit backward and forward locomotion, respectively...
November 17, 2017: Neuron
https://www.readbyqxmd.com/read/29197736/abnormal-cortical-neural-synchrony-during-working-memory-in-schizophrenia
#10
Seung Suk Kang, Angus W MacDonald, Matthew V Chafee, Chang-Hwan Im, Edward M Bernat, Nicholas D Davenport, Scott R Sponheim
OBJECTIVE: To better understand the origins of working memory (WM) impairment in schizophrenia we investigated cortical oscillatory activity in people with schizophrenia (PSZ) while they performed a WM task requiring encoding, maintenance, and retrieval/manipulation processes of spatial information. METHODS: We examined time-frequency synchronous energy of cortical source signals that were derived from magnetoencephalography (MEG) localized to cortical regions using WM-related hemodynamic responses and individualized structural head-models...
November 6, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29196823/quantitative-mapping-of-glenohumeral-cartilage-in-asymptomatic-subjects-using-3%C3%A2-t-magnetic-resonance-imaging
#11
Carly A Lockard, Katharine J Wilson, Charles P Ho, Richard C Shin, J Christoph Katthagen, Peter J Millett
OBJECTIVE: The purpose of this study was to develop quantitative T2 mapping methodology in asymptomatic shoulders for the entire mappable region of the glenohumeral cartilage in the coronal and sagittal planes, to assess the feasibility and limitations of the development of a diagnostic tool for future application in symptomatic patients. MATERIALS AND METHODS: Twenty-one asymptomatic volunteers underwent sagittal and coronal glenohumeral T2 mapping, as the spherical geometry of the humeral head obviates the need to evaluate the entire glenohumeral cartilage in a single plane...
December 1, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29192947/-executive-functions-in-frontal-lob-syndrome-a-case-report
#12
Özge Metin, Ali Evren Tufan, Nagihan Cevher Binici, Özge Saraçlı, Adnan Atalay, Ayşegül Yolga Tahiroğlu
Prefrontal cortex in frontal lobe (FL) is the center of executive functions (EF). FL damage can lead to executive dysfunction by influencing frontal-subcortical circuits (dorsolateral, orbitofrontal, ventromedial). Damage to the dorsolateral prefrontal cortex (DLPFC) can lead to deterioration in EF, whereas damage to the orbitofrontal cortex (OFC) can lead to personality changes with the characteristic of disinhibition and irritability. In addition, damage to the anterior cingulate cortex/medial prefrontal cortex (ACC/MPFC) can result in decreased spontaneity...
2017: Türk Psikiyatri Dergisi, Turkish Journal of Psychiatry
https://www.readbyqxmd.com/read/29191153/the-effect-of-specially-designed-and-managed-occlusal-devices-on-patient-symptoms-of-tinnitus-a-cohort-study
#13
L Parnell Taylor, Wayne O Sletten, Thomas D Dumont
Objective Bioesthetic maxillary anterior guided orthoses (BMAGOs) were designed and adjusted to establish the mandibular location referred to as stable seated condylar position SSCP. This study demonstrates treatment efficacy of this device on tinnitus. Methods All patients had histories of temporomandibular disorder (TMD), head, neck and shoulder pain. Each patient wore the BMAGO at all times, eating, talking and sleeping with it functioning as a surrogate occlusion. Patients were seen every two weeks for adjustments...
November 30, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/29190334/the-ventral-posterior-lateral-thalamus-preferentially-encodes-externally-applied-versus-active-movement-implications-for-self-motion-perception
#14
Alexis Dale, Kathleen E Cullen
Successful interaction with our environment requires that voluntary behaviors be precisely coordinated with our perception of self-motion. The vestibular sensors in the inner ear detect self-motion and in turn send projections via the vestibular nuclei to multiple cortical areas through 2 principal thalamocortical pathways, 1 anterior and 1 posterior. While the anterior pathway has been extensively studied, the role of the posterior pathway is not well understood. Accordingly, here we recorded responses from individual neurons in the ventral posterior lateral thalamus of macaque monkeys during externally applied (passive) and actively generated self-motion...
November 28, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29190238/longitudinal-changes-in-the-optic-nerve-head-and-retina-over-time-in-very-young-children-with-familial-exudative-vitreoretinopathy
#15
Jonghyun Lee, Mays A El-Dairi, Du Tran-Viet, Shwetha Mangalesh, Alexandria Dandridge, Kim Jiramongkolchai, Christian Viehland, Cynthia A Toth
PURPOSE: To explore vitreoretinal pathologies and their longitudinal changes visible on handheld optical coherence tomography (OCT) of young children with familial exudative vitreoretinopathy. METHODS: The authors retrospectively analyzed handheld OCT images for vitreoretinal interface and retinal abnormalities and optic nerve head (ONH) elevation. RESULTS: From 26 eyes of 16 children (mean age 32 months) with familial exudative vitreoretinopathy, 10 had ONH dragging on photographs, and in these, handheld OCT revealed temporal and anterior retinal displacement, prominent vitreopapillary adhesion or traction, and retinal nerve fiber layer thickening at ONH margins with adjacent retinal elevation...
November 22, 2017: Retina
https://www.readbyqxmd.com/read/29188151/arachnoid-cyst-and-psychosis
#16
Afaque H Khan, Syed E Ahmed
Few case reports discuss suspected psychiatric disturbances secondary to arachnoid cysts. To the best of our knowledge, psychosis from arachnoid cysts has not been reported in the recent literature. This case report discusses our experience with a 55-year-old male patient who manifested multiple psychotic episodes suspected in association with an arachnoid cyst. During the initial examinations, a computed tomography (CT) scan of his head revealed a relatively large left anterior superior arachnoid cyst with a mass effect on the frontal lobe...
September 21, 2017: Curēus
https://www.readbyqxmd.com/read/29183359/acute-on-chronic-bilateral-subdural-hematoma-presenting-with-acute-complete-flaccid-paraplegia-and-urinary-retention-mimicking-an-acute-spinal-cord-injury-a-case-report
#17
H M M T B Herath, Anne Thushara Matthias, Aruna Kulatunga
BACKGROUND: A subdural hematoma refers to a collection of blood between the dura and the arachnoid membranes and is classified into acute, sub acute and chronic. Subdural hematoma has been referred to as the "great neurologic imitator" as it can mimic many neurological conditions. CASE PRESENTATION: Forty-three year old Sri Lankan female presented 2 weeks following traumatic head injury with bilateral flaccid complete paraplegia and urinary retention. Her non-contrast computer tomography of the brain revealed bilateral acute, chronic subdural hematomas...
November 28, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29182108/triple-pelvic-osteotomy-for-the-treatment-of-symptomatic-acetabular-dysplasia-in-adolescents-and-adults-a-review-of-42-hips
#18
M E Baki, A Abdioğlu, H Aydın, S Kerimoğlu, C Bak
We treated 42 hips with symptomatic acetabular dysplasia using triple pelvic osteotomy. The mean age of the patients was 20.7 years (12-47). The median follow-up was 50.3 months. The average Harris hip score improved from 74 to 92 points. Significant improvement from the preoperative to the latest follow-up evaluation was seen radiologically with reference to the center-edge angle, the anterior center-edge angle, the acetabular index and the femoral head extrusion index. Shenton's line was intact in 9 hips before the operation and it was intact in 40 hips at the latest follow-up...
December 2016: Acta Orthopaedica Belgica
https://www.readbyqxmd.com/read/29181900/a-new-species-of-the-southeast-asian-genus-opisthotropis-serpentes-colubridae-natricinae-from-western-hunan-china
#19
Jin-Long Ren, Kai Wang, Ke Jiang, Peng Guo, Jia-Tang Li
A new species of natricine snake of the Southeast Asian genus Opisthotropis Gü nther, 1872 is described from western Hunan Province of China based on both mitochondrial DNA and morphological data. The new species is morphologically most similar and genetically most closely related to O. cheni Zhao, 1999 and O. latouchii (Boulenger, 1899), but possesses considerable genetic divergence (p-distance 5.1%-16.7%) and can be differentiated from all other congeners by a combination of the following morphological characters: (1) body size large (total length 514-586 mm) and strongly built; (2) dorsal scale rows 17 throughout, feebly keeled anteriorly and moderately keeled posteriorly; (3) ventral scales 147-152, subcaudal scales 54-62; (4) preocular absent, loreal elongated and touching orbit; (5) supralabials 8-9, fifth and sixth entering obit; (6) anterior temporals short, length 1...
September 18, 2017: Zoological Research
https://www.readbyqxmd.com/read/29181825/a-primary-hepatic-gastrinoma-accompanied-by-hyperplasia-of-multi-nodular-brunner-s-glands
#20
Takaomi Hagi, Yohei Hosoda, Izumi Komoto, Shinji Uemoto, Susumu Hijioka, Yoshiro Taki, Kazuhiro Nishiyama, Masayuki Imamura
BACKGROUND: Primary hepatic gastrinoma causing severe ulcerogenic syndrome is extremely rare. Herein, we report a case of primary hepatic gastrinoma accompanied by hyperplasia of multi-nodular Brunner's glands in a patient who instead, preoperatively, was suspected of having multiple duodenal gastrinomas and hepatic metastasis. CASE PRESENTATION: A 57-year-old woman consulted a clinic complaining of melena, intermittent abdominal pain, diarrhea, and vomiting which had persisted for about 3 years...
November 28, 2017: Surgical Case Reports
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