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https://www.readbyqxmd.com/read/29332305/oblique-thyroarytenoid-muscle-in-humans-an-independent-muscle-or-an-accessory-belly
#1
Shin-Hyo Lee, Ki-Seok Koh, Wu-Chul Song
OBJECTIVES/HYPOTHESIS: This study aimed to determine the prevalence and morphological variations of the oblique thyroarytenoid (TA) muscle in humans. STUDY DESIGN: Cadaveric anatomic dissections. METHODS: One hundred hemilarynges from 50 formalin-embalmed cadavers were dissected to investigate the morphology of muscle fibers of the TA muscle. RESULTS: Thirty-six (36%) hemilarynges were found to have a distinct oblique belly superficial to the TA muscle...
January 14, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29331230/lower-limb-articular-scaling-and-body-mass-estimation-in-pliocene-and-pleistocene-hominins
#2
Christopher B Ruff, M Loring Burgess, Nicole Squyres, Juho-Antti Junno, Erik Trinkaus
Previous attempts to estimate body mass in pre-Holocene hominins have relied on prediction equations derived from relatively limited extant samples. Here we derive new equations to predict body mass from femoral head breadth and proximal tibial plateau breadth based on a large and diverse sample of modern humans (avoiding the problems associated with using diaphyseal dimensions and/or cadaveric reference samples). In addition, an adjustment for the relatively small femoral heads of non-Homo taxa is developed based on observed differences in hip to knee joint scaling...
January 10, 2018: Journal of Human Evolution
https://www.readbyqxmd.com/read/29330950/comparative-anatomy-of-bat-jaw-musculature-via-diffusible-iodine-based-contrast-enhanced-computed-tomography
#3
Sharlene E Santana
Noctilionoid bats exhibit an extraordinary array of cranial specializations that match diverse diets, including variation in jaw musculature physiological cross-sectional areas (PCSA), lever arms, and relative contribution to bite force. Although previous research in this group has linked variation in skull shape and muscle mechanics to biting performance, there are still important gaps about the anatomical underpinnings of noctilionoid dietary adaptations, including the degree of compartmentalization of the jaw musculature, and whether and how muscle attachment sites have evolved across noctilionoid species that specialize on derived diets...
February 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29330651/3d-computed-tomography-to-compare-the-dimensions-of-the-left-atrial-appendage-in-patients-with-normal-sinus-rhythm-and-those-with-paroxysmal-atrial-fibrillation
#4
Maiko Hozawa, Yoshihiro Morino, Yuki Matsumoto, Ryoichi Tanaka, Kyohei Nagata, Akiko Kumagai, Atsushi Tashiro, Akio Doi, Kunihiro Yoshioka
Although paroxysmal atrial fibrillation (PAF) is an important cause of cardioembolic stroke, in contrast to chronic AF patients, the anatomical features of the left atrial appendage (LAA) in PAF patients remain unknown. Here, we investigated differences in LAA structures in patients with PAF and those with normal sinus rhythms (NSR) using 3D-computed tomography (3D-CT), which allows us to visualize complicated LAA structures at high spatial resolution. Study subjects were 30 consecutive PAF and 30 NSR patients with complete enhanced cardiac 3D-CT images available...
January 12, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29329435/expanding-a-radiology-lexicon-using-contextual-patterns-in-radiology-reports
#5
Bethany Percha, Yuhao Zhang, Selen Bozkurt, Daniel Rubin, Russ B Altman, Curtis P Langlotz
Objective: Distributional semantics algorithms, which learn vector space representations of words and phrases from large corpora, identify related terms based on contextual usage patterns. We hypothesize that distributional semantics can speed up lexicon expansion in a clinical domain, radiology, by unearthing synonyms from the corpus. Materials and Methods: We apply word2vec, a distributional semantics software package, to the text of radiology notes to identify synonyms for RadLex, a structured lexicon of radiology terms...
January 10, 2018: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/29328966/cementum-as-a-source-of-dna-in-challenging-forensic-cases
#6
Hussam Mansour, Oliver Krebs, Jan Peter Sperhake, Christa Augustin, Till Koehne, Michael Amling, Klaus Püschel
Each forensic case is characterized by its own uniqueness. Deficient forensic cases require additional sources of human identifiers to assure the identity. We report on two different cases illustrating the role of teeth in answering challenging forensic questions. The first case involves identification of an adipocere male found in a car submersed in water for approximately 2 years. The second scenario, which involves paternity DNA testing of an exhumed body, was performed approximately 2.8 years post-mortem...
January 3, 2018: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29325379/-pay-attention-to-the-clinical-classification-and-individualized-treatment-of-superior-oblique-palsy
#7
X L Kang, Y Wei
Superior oblique palsy (SOP) has many anatomic variations, and the accompanied paralysis generalization could stimulate the secondary changes of other extra-ocular muscles. Therefore, the clinical manifestations of SOP can be various, and the surgical design is complicated and changeable. It is necessary to understand the clinical development, stages and types of SOP correctly, and to take into account the developmental characteristics of the superior oblique muscle and select the individualized treatment plan...
December 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29325356/-the-role-and-significance-of-digital-reconstruction-technique-in-liver-segments-based-on-portal-vein-structure
#8
X J Zhou, Q Dong, C Z Zhu, X Chen, B Wei, Y H Duan, J Zhao, X W Hao, H Zhang, P Nie, B Hu, W J Xu, R W Shen, Z H Chen, K R Dong, Y Z Bai, Q Shu, W J Luo, F Gao, N Xia, Q Y Yu
Objective: To study the segment of liver according to the large amount of three-dimensional(3D) reconstructive images of normal human livers and the vascular system, and to recognize the basic functional liver unit based on the anatomic features of the intrahepatic portal veins. Methods: The enhanced CT primitive DICOM files of 1 260 normal human livers from different age groups who treated from October 2013 to February 2017 provided by 16 hospitals were analyzed using the computer-aided surgery system.The 3D liver and liver vascular system were reconstructed, and the digital liver 3D model was established...
January 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29325002/traits-and-trade-offs-in-whole-tree-hydraulic-architecture-along-the-vertical-axis-of-eucalyptus-grandis
#9
Sebastian Pfautsch, Michael J Aspinwall, John E Drake, Larissa Chacon-Doria, Rob J A Langelaan, David T Tissue, Mark G Tjoelker, Frederic Lens
Background and Aims: Sapwood traits like vessel diameter and intervessel pit characteristics play key roles in maintaining hydraulic integrity of trees. Surprisingly little is known about how sapwood traits covary with tree height and how such trait-based variation could affect the efficiency of water transport in tall trees. This study presents a detailed analysis of structural and functional traits along the vertical axes of tall Eucalyptus grandis trees. Methods: To assess a wide range of anatomical and physiological traits, light and electron microscopy was used, as well as field measurements of tree architecture, water use, stem water potential and leaf area distribution...
January 9, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29324930/characteristics-socioeconomic-status-and-ethnic-variations-of-primary-idiopathic-macular-hole-repair-in-vitreoretinal-centers-in-the-united-kingdom
#10
M Vasalaki, E Papavasileiou, S Velissaris, C Garnavou-Xirou, V Zygoura, O Theodorou, R Zakir, G Duguid, T Sandinha, D Steel, T L Jackson
OBJECTIVE: The purpose of this multicentre retrospective study was to investigate the characteristics and role of ethnicity and socioeconomic status amongst patients with idiopathic macular holes (IMH) and the surgical outcome. SUBJECTS AND METHOD: Consecutive patients undergoing primary IMH surgery at three vitreoretinal units in the UK (King's College Hospital, London, UK, Western Eye Hospital, London, UK, Sunderland Eye Infirmary, Sunderland, UK) between January 2007 and May 2017 were included...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29324373/abdominal-ct-aided-diagnosis-of-acute-appendicitis-in-the-presence-of-mobile-cecum-a-case-report
#11
Kentaro Yazawa, Yuki Azuma, Tomohiro Kurokawa, Yuichiro Yoshioka, Giichiro Tsurita, Masaru Shinozaki
INTRODUCTION: A mobile cecum is a frequently encountered congenital anomaly. It is important to recognize this atypical position of the cecum as it may interfere with an accurate diagnosis of acute appendicitis. PRESENTATION OF CASE: A 48-year-old man presented with abdominal pain, anorexia, and fever. He had mild lower abdominal discomfort, and rebound tenderness in the suprapubic region, but no guarding or right lower quadrant findings. Laboratory tests identified an elevated white blood cell count (12350 cells/mL) and C-reactive protein level (4...
December 28, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29323624/sella-turcica-bridging-and-ossified-carotico-clinoid-ligament-correlation-with-sex-and-age
#12
Daniele Gibelli, Michaela Cellina, Stefano Gibelli, Marta Panzeri, Antonio Giancarlo Oliva, Giovanni Termine, Chiarella Sforza
Aim Sella turcica bridging and ossified carotico-clinoid ligament are two variants of the sella turcica, the origin of which is partially unknown. These variations should be properly recognised, as they may hamper the removal of the anterior clinoid process in surgical procedures. Therefore, our aim was to determine the prevalence of these two anatomical variants and to investigate their prevalence according to patient sex and age in a series of maxilla computed tomography scans. Materials and methods We revised 300 computed tomography scans of the head from northern Italian patients, stratified into three age groups (18-40 years, 41-60 years, >60 years): a logistic regression analysis was used to explore an association of sella turcica bridging with age and sex through Matlab software, also including a test for the extracted model ( P < 0...
January 1, 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29322587/growth-rings-in-roots-of-medicinal-perennial-dicotyledonous-herbs-from-temperate-and-subtropical-zones-in-china
#13
Shanshan Chu, Lingling Tan, Chanchan Liu, Huasheng Peng, Haiyan Duan, Luqi Huang
Growth years are closely related to the quality of Chinese medicinal materials, and they can provide a reliable basis for quality evaluation on crude drugs in accordance with the suitable growth years. Herbchronology, the numerical and pattern analysis of annual growth rings in herbaceous perennials, has emerged to be a recognized science that is applied in age determination of perennial forbs. Fifty medicinal species growing in temperate and subtropical zones of China were examined by microstructure observation to determine the presence of growth rings in the secondary root xylem of medicinal perennial dicotyledonous herbs...
January 11, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29321949/piercing-of-the-lumbocostal-ligament-by-the-subcostal-nerve-a-previously-unreported-case
#14
Marc Vetter, Joe Iwanaga, Rod J Oskouian, R Shane Tubbs
As lateral approaches gain popularity in lumbar spine surgery, detailed discussions regarding anatomical variations in the innervation of the thoracolumbar region are of increasing importance. Damage to intercostal or subcostal nerves can lead to post-operative complications including regional loss of sensitivity, motor function, or abdominal wall hernias. More specifically, the subcostal nerve has been identified in the literature as one of the more vulnerable structures during such procedures. A clear understanding of the position of the subcostal nerve relative to nearby anatomical structures is therefore important for medical professionals...
November 7, 2017: Curēus
https://www.readbyqxmd.com/read/29319237/regional-differences-in-purkinje-cell-morphology-in-the-cerebellar-vermis-of-male-mice
#15
Hermina Nedelescu, Mohamed Abdelhack, Arwel T Pritchard
Regional differences in dendritic architecture can influence connectivity and dendritic signal integration, with possible consequences for neuronal computation. In the cerebellum, analyses of Purkinje cells (PCs), which are functionally critical as they provide the sole output of the cerebellar cortex, have suggested that the cerebellar cortex is not uniform in structure as traditionally assumed. However, the limitations of traditional staining methods and microscopy capabilities have presented difficulties in investigating possible local variations in PC morphology...
January 10, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29318364/five-mental-foramina-in-the-same-mandible-cbct-findings-of-an-unusual-anatomical-variant
#16
Andrea Borghesi, Stefania Pezzotti, Giorgio Nocivelli, Roberto Maroldi
The mental foramen is an important anatomic landmark located on the buccal aspect of the mandible, typically near the apex of the second premolar. Mental foramina exhibit many anatomical variations, including differences in size, shape, position, and number. The most frequent type of variation in number is the presence of double mental foramen, which has a reported incidence ranging from 1.4 to 12.5%. The incidence of triple mental foramen ranges from 0.7 to 1.2%. The frequency of accessory mental foramina varies among ethnic groups, with a low incidence in white Caucasian populations...
January 9, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29318363/double-left-brachiocephalic-vein-with-a-preaortic-course-a-rare-finding
#17
Geum Hee Hwang, Kyung Hee Lee, Soon Gu Cho, Yong Sun Jeon, Yeo Ju Kim, Ha Young Lee, Jun Ho Kim
A double left brachiocephalic vein is an uncommon anatomic variation. Among these, a accessory branch with preaortic course is extremely rare. In this case, both branches of the left brachiocephalic vein were anterior to the aortic arch. We describe the computed tomography findings with volume-rendering imaging of this rare anatomic variation.
January 9, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29317981/percutaneous-intervention-of-a-single-coronary-artery-in-the-setting-of-acute-coronary-syndrome
#18
Mohammady Shahin, Nooraldaem Yousif, Thomas F Luscher, Slayman Obeid
Performing intervention of a single coronary artery (SCA) is challenging and technically difficult since a severe complication may be catastrophic if occurred. It requires a proper selection of instruments and well experienced operator to perform the intervention. However, a definitive standardization treatment for those patients is difficult; each case should be treated individually, according to the anatomical variations. We present three rare cases of SCA in setting of acute coronary syndrome (ACS) and culprit lesion in right coronary artery (RCA), treated successfully with percutaneous coronary intervention...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29316434/characterizing-the-killer-colorectal-carcinomas
#19
Stanley R Hamilton
In this issue of Cancer Cell, Yaeger et al. report mutations, copy number variations, and selected rearrangements from a large series of metastatic colorectal carcinomas and primaries that produced metastases. The results provide important insights into differences in anatomical site of origin, age at onset, etiologic factors, and therapeutic responses.
January 8, 2018: Cancer Cell
https://www.readbyqxmd.com/read/29312840/relationship-between-the-intersesamoid-ligament-and-sesamoid-bones-in-cadaveric-feet-with-hallux-valgus
#20
Regina C Fiacco, Garen M Ream, Charlotte Wilson, R Shane Tubbs, Marios Loukas, Piotr B Kozlowski, Anthony C DiLandro, Kevin T Jules, Anthony V D'Antoni
There is heterogeneity in the literature regarding the anatomy, exact location, and definition of the intersesamoid ligament (IL). Anatomic knowledge of the IL and its variations are important for surgeons who undertake corrective surgery for hallux abducto valgus (HAV). The IL was dissected in 16 feet from 32 formalin-fixed cadavers (12 females, four males; mean age at death, 76.6 years) to examine its morphology. The length, width, and thickness of its constituent bands were recorded with a digital caliper...
November 3, 2017: Curēus
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