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Hand anatomy

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https://www.readbyqxmd.com/read/28453339/the-painful-sacrifice-the-epidemiology-of-hand-injuries-during-the-holy-festivals-in-the-sultanate-of-oman-a-10-year-case-control-study
#1
Sultan Al-Shaqsi, Taimoor Al-Bulushi, Ayman Al-Salmi, Ammar Al-Kashmiri, Ali Al-Lawatti
BACKGROUND: The human hand is an important functional and sensory organ. Its complex anatomy reflects its important functional capabilities. Many Muslim countries observe the holy festivals with a traditional sacrifice of an animal in order to share the meat (basic commodity) with beloved ones. During such festivals hand injuries have been reported to increase. This study aimed to compare cases and controls of hand injuries treated at the national trauma center in the Sultanate of Oman during a 10-year time period...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28453336/the-relationship-between-the-intercrease-line-and-the-a1-digital-pulley-a-cadaveric-study
#2
Colyn J Watkins, Nikola Zivaljevic, Kyle R Eberlin, Michael Rivlin, Chaitanya S Mudgal
BACKGROUND: Accurate identification of surface anatomy is critical to identify the location of the A1 pulley. The intercrease line (ICL) describes a transverse line between the radial edge of the proximal palmar crease and the ulnar edge of the distal palmar crease. We hypothesize that this easily identifiable surface landmark approximates the location of the A1 pulley. METHODS: The ICL was marked on 7 cadaver hands. We marked a point proximal to the proximal digital crease (PDC) equal to the distance between each digit's proximal interphalangeal crease (PIC) and PDC (the PIC/PDC point)...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28442732/human-bipedal-instability-in-tree-canopy-environments-is-reduced-by-light-touch-fingertip-support
#3
L Johannsen, S R L Coward, G R Martin, A M Wing, A van Casteren, W I Sellers, A R Ennos, R H Crompton, S K S Thorpe
Whether tree canopy habitats played a sustained role in the ecology of ancestral bipedal hominins is unresolved. Some argue that arboreal bipedalism was prohibitively risky for hominins whose increasingly modern anatomy prevented them from gripping branches with their feet. Balancing on two legs is indeed challenging for humans under optimal conditions let alone in forest canopy, which is physically and visually highly dynamic. Here we quantify the impact of forest canopy characteristics on postural stability in humans...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438411/magnetic-resonance-imaging-of-the-digital-nerves-of-the-hand-anatomy-and-spectrum-of-pathology
#4
REVIEW
Charles H Mitchell, Laura M Fayad, Shivani Ahlawat
Digital nerves are intrinsic to the sensory and motor function of the hand. These nerves represent the terminal ramifications of the ulnar, median, and radial nerves and are located distal to the carpal tunnel and Guyon canal. With magnetic resonance imaging, traumatic and nontraumatic abnormalities of the digital nerves can be shown with high contrast as well as high spatial resolution. Digital nerve abnormalities are most commonly posttraumatic in nature; however, infection, inflammatory, vascular malformations, and neoplasms can rarely occur...
March 6, 2017: Current Problems in Diagnostic Radiology
https://www.readbyqxmd.com/read/28427870/all-endoscopic-brachial-plexus-complete-neurolysis-for-idiopathic-neurogenic-thoracic-outlet-syndrome-a-prospective-case-series
#5
Thibault Lafosse, Malo Le Hanneur, Laurent Lafosse
PURPOSE: To describe an all-endoscopic technique for infra- and supraclavicular brachial plexus (BP) neurolysis and to assess its functional outcomes for patients suffering from nonspecific neurogenic thoracic outlet syndrome (NTOS). METHODS: Between January 2010 and January 2013, 36 patients presenting an idiopathic nonspecific NTOS benefited from an endoscopic decompression in our institution. The inclusion criteria were a typical clinical NTOS and failure of a 6-month well-conducted nonsurgical treatment...
April 17, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28419750/the-effectiveness-of-virtual-and-augmented-reality-in-health-sciences-and-medical-anatomy
#6
Christian Moro, Zane Štromberga, Athanasios Raikos, Allan Stirling
Although cadavers constitute the gold standard for teaching anatomy to medical and health science students, there are substantial financial, ethical, and supervisory constraints on their use. In addition, although anatomy remains one of the fundamental areas of medical education, universities have decreased the hours allocated to teaching gross anatomy in favor of applied clinical work. The release of virtual (VR) and augmented reality (AR) devices allows learning to occur through hands-on immersive experiences...
April 17, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28416451/diffeomorphic-functional-brain-surface-alignment-functional-demons
#7
Karl-Heinz Nenning, Hesheng Liu, Satrajit Ghosh, Mert Sabuncu, Ernst Schwartz, Georg Langs
Aligning brain structures across individuals is a central prerequisite for comparative neuroimaging studies. Typically, registration approaches assume a strong association between the features used for alignment, such as macro-anatomy, and the variable observed, such as functional activation or connectivity. Here, we propose to use the structure of intrinsic resting state fMRI signal correlation patterns as a basis for alignment of the cortex in functional studies. Rather than assuming the spatial correspondence of functional structures between subjects, we have identified locations with similar connectivity profiles across subjects...
April 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28413989/anatomical-wrist-patterns-on-plain-radiographs
#8
Aviv Kramer, Raviv Allon, Alon Wolf, Tal Kalaiman, Idit Lavi, Ronit Wollstein
BACKGROUND: Interpreting the structure in the wrist is complicated by the existence of multiple joints as well as variability in bone shapes and anatomical patterns. Previous studies have evaluated lunate and capitate shape in an attempt to understand functional anatomical patterns. OBJECTIVE: The purpose of this study was to describe anatomical shapes and wrist patterns in normal wrist radiographs. We hypothesized that there is a significant relationship in the midcarpal joint with at least one consistent pattern of wrist anatomy...
April 17, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28412442/human-brain-mapping-a-systematic-comparison-of-parcellation-methods-for-the-human-cerebral-cortex
#9
REVIEW
Salim Arslan, Sofia Ira Ktena, Antonios Makropoulos, Emma C Robinson, Daniel Rueckert, Sarah Parisot
The macro-connectome elucidates the pathways through which brain regions are structurally connected or functionally coupled to perform a specific cognitive task. It embodies the notion of representing and understanding all connections within the brain as a network, while the subdivision of the brain into interacting functional units is inherent in its architecture. As a result, the definition of network nodes is one of the most critical steps in connectivity network analysis. Although brain atlases obtained from cytoarchitecture or anatomy have long been used for this task, connectivity-driven methods have arisen only recently, aiming to delineate more homogeneous and functionally coherent regions...
April 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28410000/properties-of-porcine-adipose-derived-stem-cells-and-their-applications-in-preclinical-models
#10
Julien H Arrizabalaga, Matthias U Nollert
Adipose-derived stem cells represent a reliable adult stem cell source thanks to their abundance, straightforward isolation, and broad differentiation abilities. Consequently, human adipose-derived stem cells (hASCs) have been used in vitro for several innovative cellular therapy and regenerative medicine applications. However, the translation of a novel technology from the laboratory to the clinic requires first to evaluate its safety, feasibility, and potential efficacy through preclinical studies in animals...
March 30, 2017: Adipocyte
https://www.readbyqxmd.com/read/28409134/anatomical-variations-of-pronator-teres-muscle-predispositional-role-for-nerve-entrapment
#11
Edie Benedito Caetano, Luiz Ângelo Vieira, Fábio Antonio Anversa Sprovieri, Guilherme Camargo Petta, Maurício Tadeu Nakasone, Bárbara Lívia Correa Serafim
OBJECTIVE: To assess the anatomical variations of the pronator teres muscle (PTM) and its implication in the compression of the median nerve, which passes through the humeral and ulnar heads of the PTM. METHODS: For the present study, 100 upper limbs from human cadavers from the anatomy laboratory were dissected. Forty-six specimens were male and four, female, whose aged ranged from 28 to 77 years; 27 were white and 23, non-white. A pilot study consisting of six hands from three fresh cadaver dissections was conducted to familiarize the authors with the local anatomy; these were not included in the present study...
March 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28407076/differential-gene-expression-and-transport-functionality-in-the-bundle-sheath-versus-mesophyll-a-potential-role-in-leaf-mineral-homeostasis
#12
Noa Wigoda, Metsada Pasmanik-Chor, Tianyuan Yang, Ling Yu, Menachem Moshelion, Nava Moran
Under fluctuating ambient conditions, the ability of plants to maintain hydromineral homeostasis requires the tight control of long distance transport. This includes the control of radial transport within leaves, from veins to mesophyll. The bundle sheath is a structure that tightly wraps around leaf vasculature. It has been suggested to act as a selective barrier in the context of radial transport. This suggestion is based on recent physiological transport assays of bundle sheath cells (BSCs), as well as the anatomy of these cells...
April 12, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28399788/distal-radioulnar-joint-functional-anatomy-including-pathomechanics
#13
J R Haugstvedt, M F Langer, R A Berger
The distal radioulnar joint allows the human to rotate the forearm to place the hand in a desired position to perform different tasks, without interfering with the grasping function of the hand. The ulna is the stable part of the forearm around which the radius rotates; the stability of the distal radioulnar joint is provided by the interaction between ligaments, muscles and bones. The stabilizing structures are the triangular fibrocartilage complex, the ulnocarpal ligament complex, the extensor carpi ulnaris tendon and tendon sheath, the pronator quadratus, the interosseous membrane and ligament, the bone itself and the joint capsule...
May 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28392310/the-role-of-the-autonomic-nervous-system-in-arrhythmias-and-sudden-cardiac-death
#14
REVIEW
Sonia Franciosi, Frances K G Perry, Thomas M Roston, Kathryn R Armstrong, Victoria E Claydon, Shubhayan Sanatani
The autonomic nervous system (ANS) is complex and plays an important role in cardiac arrhythmia pathogenesis. A deeper understanding of the anatomy and development of the ANS has shed light on its involvement in cardiac arrhythmias. Alterations in levels of Sema-3a and NGF, both growth factors involved in innervation patterning during development of the ANS, leads to cardiac arrhythmias. Dysregulation of the ANS, including polymorphisms in genes involved in ANS development, have been implicated in sudden infant death syndrome...
March 31, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28377943/expert-evaluation-of-a-chicken-tissue-based-model-for-teaching-ultrasound-guided-central-venous-catheter-insertion
#15
Akiva Nachshon, John D Mitchell, Ariel Mueller, Valerie M Banner-Goodspeed, Jakob I McSparron
BACKGROUND: Ultrasound-guided central venous catheterization (CVC) is a commonly performed procedure which carries significant risks for complications. Current models used for simulation-based teaching are expensive and may not replicate tissue feel and ultrasound qualities of human tissues. We aimed to evaluate a tissue model composed of chicken breast and balloons and compare it to a commercially available mannequin. METHODS: Forty attending physicians from four departments with extensive CVC experience were enrolled...
January 2017: Journal of Education in Perioperative Medicine: JEPM
https://www.readbyqxmd.com/read/28373785/chronic-total-coronary-occlusion-recanalization-current-techniques-and-new-devices
#16
REVIEW
Jan-Erik Gülker, Lars Bansemir, Heinrich G Klues, Alexander Bufe
Percutaneous coronary intervention (PCI) of total chronic coronary occlusion (CTO) still remains a major challenge. The prevalence of a CTO has been reported to be up to 30% among patients with a clinical indication for coronary angiography. Progress has been made with further advanced interventional techniques and continuously sophisticated interventional tools. Nevertheless the number of interventions carried out to recanalize a CTO is less than 10% of all procedures. Benefits of a successful CTO recanalization include relief of angina pectoris and ischemia-related dyspnea, substantial improvement in left ventricular function and, avoidance of surgery treatment...
April 2017: Journal of the Saudi Heart Association
https://www.readbyqxmd.com/read/28371793/ultrasound-standard-plane-detection-using-a-composite-neural-network-framework
#17
Hao Chen, Lingyun Wu, Qi Dou, Jing Qin, Shengli Li, Jie-Zhi Cheng, Dong Ni, Pheng-Ann Heng
Ultrasound (US) imaging is a widely used screening tool for obstetric examination and diagnosis. Accurate acquisition of fetal standard planes with key anatomical structures is very crucial for substantial biometric measurement and diagnosis. However, the standard plane acquisition is a labor-intensive task and requires operator equipped with a thorough knowledge of fetal anatomy. Therefore, automatic approaches are highly demanded in clinical practice to alleviate the workload and boost the examination efficiency...
March 30, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28365848/attenuation-of-cortical-activity-triggering-descending-pain-inhibition-in-chronic-low-back-pain-patients-a-functional-magnetic-resonance-imaging-study
#18
Yohei Matsuo, Jiro Kurata, Miho Sekiguchi, Katsuhiro Yoshida, Takuya Nikaido, Shin-Ichi Konno
PURPOSE: A considerable portion of chronic low back pain (cLBP) patients lack anatomical abnormality, resist conventional therapeutic interventions, and their symptoms are often complicated with psychological and social factors. Such patients have been reported to show cerebral abnormalities both in anatomy and function by neuroimaging studies. Here we examined differences in cerebral reactivity to a simulated low back pain stimulus between cLBP patients and healthy controls by functional magnetic resonance imaging (fMRI), and their behavioral correlates from a psychophysical questionnaire...
April 1, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28363298/postburn-contractures-of-the-hand
#19
REVIEW
Matthew Brown, Kevin C Chung
Postburn contractures are a common occurrence after severe burn injuries. It is important to understand the pathologic condition and anatomy of specific postburn deformities in order to provide comprehensive surgical care. Postburn contractures can result in a flexion contracture, boutonniere deformity, burn syndactyly, metacarpophalangeal extension contracture, wrist contracture, or claw hand. A patient evaluation is performed before proceeding to the operating room. Surgery sequences require proper incision design, release of the skin, and deeper contracted structures and coverage with an appropriate flap or graft...
May 2017: Hand Clinics
https://www.readbyqxmd.com/read/28361190/-the-fibrous-skeleton-of-the-hand-changes-with-dupuytren-s-contracture
#20
M F Langer, J Grünert, F Unglaub, B Wieskötter, S Oeckenpöhler
The exact knowledge of the anatomy of the fibrous skeleton of the hand is an absolute prerequisite for any treatment of Dupuytren's disease. The fibrous skeleton does not only include the palmar aponeurosis, but also numerous retinacula cutis, which are not found in current anatomy books. Here, eponyms facilitate the otherwise difficult and over-pronounced names of the fiber systems. Skoog, Legueu and Juvara, Gosset, Grapow, Grayson, Cleland, Thomine, and Barton are the most important. This systematic review of the fibers and strands is designed to help reduce iatrogenic complications...
March 30, 2017: Der Orthopäde
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