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https://www.readbyqxmd.com/read/29651555/larval-neurogenesis-in-the-copepod-tigriopus-californicus-tetraconata-multicrustacea
#1
Hendrikje Hein, Gerhard Scholtz
Arthropod early neurogenesis shows distinct patterns that have been interpreted in an evolutionary framework. For instance, crustaceans and Hexapoda form the taxon Tetraconata and share the differentiation of specific neural precursors, the neuroblasts, a character which sets them apart from Chelicerata and Myriapoda. Neuroblasts are relatively large stem cells that generate ganglion mother cells by asymmetric divisions. Ganglion mother cells typically divide once to give rise to neurons and glia cells. In hexapods, neuroblasts segregate from the neuroectoderm before they begin their characteristic proliferative activity...
April 12, 2018: Development Genes and Evolution
https://www.readbyqxmd.com/read/29649006/the-influence-of-volume-and-anatomic-location-of-optic-disc-drusen-on-the-sensitivity-of-autofluorescence
#2
Frederik Cornelius Loft, Lasse Malmqvist, Anne-Sofie Wessel Lindberg, Steffen Hamann
BACKGROUND: Optic disc drusen (ODD) are acellular deposits in the optic nerve head. ODD can be diagnosed using different imaging modalities, including enhanced depth imaging optical coherence tomography (EDI-OCT) and autofluorescence (AF). It is unknown which factors determine the sensitivity of AF. The aim of this study was to investigate the effect of volume and anatomic location of ODD on the sensitivity of AF. METHODS: Cross-sectional study. RESULTS: A total of 38 patients (75 eyes) with ODD were included...
April 11, 2018: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29644964/ulnar-and-superficial-radial-nerve-swellings-in-two-patients-with-leprosy
#3
Neeraj Kumar, Ravindra Kumar Garg, Hardeep Singh Malhotra
No abstract text is available yet for this article.
April 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29644112/unusual-bilateral-sensory-innervation-of-the-dorsum-of-hand-by-lateral-antebrachial-cutaneous-nerve-a-case-report
#4
Neha, Hare Krishna
A 68-year-old male cadaver showed bilateral variation in the sensory innervation of the dorsum of hand. On the dorsum of right hand, first digit and lateral half of second digit were supplied by lateral antebrachial cutaneous nerve (LABCN); medial side of second digit and lateral side of third digit were supplied by superficial branch of radial nerve (SBRN) and medial side of third digit, the fourth and fifth digits were supplied by dorsal cutaneous branch of ulnar nerve (DBUN). On the dorsum of the left hand, lateral side of first digit was supplied by LABCN, medial side of first digit, the second and third digits as well as the lateral side of fourth digit were supplied by SBRN; medial side of fourth digit and fifth digit were supplied by DBUN...
March 2018: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/29642947/absence-of-flexor-carpi-radialis-identified-during-volar-approach-for-fixation-of-distal-radius-fracture-a-case-report
#5
Tomoyo Irie, Makoto Motomiya, Norimasa Iwasaki
BACKGROUND: Volar locking plate fixation of distal radius fractures is commonly performed because of its good clinical outcomes. The flexor carpi radialis (FCR) approach is one of the most popular approaches to dissecting the volar side of the distal radius because of its simplicity and safety. We describe an extremely rare case of an absent FCR identified during a volar approach for fixation of a distal radius fracture. CASE PRESENTATION: A 59-year-old woman with distal radius fracture underwent surgery using the usual FCR approach and volar locking plate...
April 11, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29625795/the-venous-patterns-of-the-cubital-fossa-in-subjects-from-brazil
#6
L Pires, A L Ráfare, B U Peixoto, T O J S Pereira, D M M Pinheiro, M E B Siqueira, R D Vaqueiro, R C de Paula, M A Babinski, C A A Chagas
Venous punctures are among the most common procedures performed by healthcare professionals. In particular, the cubital fossa is the site where the venous accesses are frequently made due to the number of superficial veins and the numerous anastomoses in this region. The arrangement of these venous connections is of particular interest for clinical application in several areas, thus, the healthcare professional must possess knowledge about these vessels and their anatomical relationships. The present study aims to analyze the venous pattern of the cubital fossa among individuals from Brazil...
April 3, 2018: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/29615086/comparison-of-lateral-entry-with-crossed-entry-pinning-for-pediatric-supracondylar-humeral-fractures-a-meta-analysis
#7
Yuyan Na, Rui Bai, Zhenqun Zhao, Changxu Han, Lingyue Kong, Yizhong Ren, Wanlin Liu
BACKGROUND: The standard treatment for severe displaced pediatric supracondylar humeral fracture (SCHF) is closed reduction and percutaneous pin fixation. However, controversy persists concerning the optimal pin fixation technique. The purpose of this study was to compare the safety and efficacy on the configuration of lateral entry only with crossed entry pin fixation for SCHF, including Gartland type II and type III fractures in children. METHODS: Published literatures, including retrospective studies, prospective studies, and randomized controlled trials, presenting the probability of poor functional consequence of elbow and/or loss of reduction and/or iatrogenic ulnar nerve injury and/or superficial infection and/or cubitus varus were included...
April 3, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29611789/superficial-branch-of-the-radial-nerve-injury-a-case-for-conscious-perioperative-arterial-cannulation
#8
John Hickman, Ahmed Chekairi
We present a case of an injury to the superficial branch of the radial nerve following unconscious radial artery cannulation in a 57-year-old gentleman for revision of lumbar spinal fusion. Nerve damage is a rare complication of this commonly used technique; whilst usually self-limiting, it can lead to a significant under-reported burden of morbidity on our patients. We discuss current norms of practice, questioning the safety of unconscious arterial cannulation, and suggest that, where possible, it should be performed in the conscious patient to minimise the risk of this rare complication...
April 2018: Journal of Perioperative Practice
https://www.readbyqxmd.com/read/29609439/a-better-facial-contour-accomplished-by-parotid-duct-preserving-superficial-parotidectomy
#9
Jun Ho Park, Chang Yong Choi, Syeo Young Wee, Young Man Lee
Depression of facial contour after parotidectomy is still challenging to many of surgeons. A 68-year-old man presented with a 4-month history of a painless swelling in both parotid area. The mass was multiple and fixed at the parotid region. We conducted a parotid duct preserving bilateral superficial parotidectomy by one-stage operation to remove the multiple tumors. A lazy S incision was made in both preauricular area and the peripheral branches of the facial nerve were identified using surgical landmark...
March 2018: Archives of Craniofacial Surgery
https://www.readbyqxmd.com/read/29604459/subcortical-sources-dominate-the-neuroelectric-auditory-frequency-following-response-to-speech
#10
Gavin M Bidelman
Frequency-following responses (FFRs) are neurophonic potentials that provide a window into the encoding of complex sounds (e.g., speech/music), auditory disorders, and neuroplasticity. While the neural origins of the FFR remain debated, renewed controversy has reemerged after demonstration that FFRs recorded via magnetoencephalography (MEG) are dominated by cortical rather than brainstem structures as previously assumed. Here, we recorded high-density (64 ch) FFRs via EEG and applied state-of-the art source imaging techniques to multichannel data (discrete dipole modeling, distributed imaging, independent component analysis, computational simulations)...
March 28, 2018: NeuroImage
https://www.readbyqxmd.com/read/29600216/a-rare-case-of-intraneural-neurothekeoma-of-median-nerve-mimicking-carpal-tunnel-syndrome
#11
Ayush Sharma, Prashant Chandrakant Kamble, Vijay Singh
Introduction: Neurothekeomas are uncommon benign soft tissue tumors of the peripheral nerves. It is commonly found in the upper extremities and in the head and the neck region as a small, asymptomatic, and superficial nodule. Case Report: We report a rare case of intraneural neurothekeoma (2.8 χ 2.4 x 1.8 cm) of the median nerve at the wrist in a 56-year-old female, which presented with clinical features of carpal tunnel syndrome. Conclusion: Carpal tunnel syndrome caused by intraneural neurothekeoma has been rarely reported...
November 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29600178/the-optic-nerve-head-perfusion-and-its-correlation-with-the-macular-blood-perfusion-in-unilateral-idiopathic-macular-hole-an-optical-coherence-tomography-angiography-study
#12
Xin-Xin Liu, Yu-Fei Teng, Meng Gao, Xi-Da Liang, Yan-Ping Yu, Wu Liu
AIM: To compare the optic nerve head (ONH) perfusion in both eyes of unilateral idiopathic macular hole (IMH) with normal control group by using optical coherence tomography angiography (OCTA) and investigate its correlationship with the macular blood perfusion. METHODS: We performed a prospective and cross-sectional study that included 19 patients with full-thickness unilateral IMH and 24 age- and sex-matched controls. All participants received OCTA test. The ONH perfusion was evaluated by the regions of peripapillary and whole en face (the sum of peripapillary and optic disc)...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29595737/surgical-approach-to-injuries-of-the-cervical-plexus-and-its-peripheral-nerve-branches
#13
David L Brown, A Lee Dellon
BACKGROUND: Located in the neck beneath the sternocleidomastoid muscle, the cervical plexus comprises a coalition of nerves originating from C1 through C4, which provide input to four cutaneous, seven motor, and three cranial nerves and the sympathetic trunk. Sporadic instances of injury to these superficial nerves have been reported. Nevertheless, this specific anatomical cause of neurogenic pain remains incompletely described and underrecognized. METHODS: Twelve patients presented with pain and were diagnosed with various combinations of injury to the lesser occipital, great auricular, transverse cervical, and supraclavicular nerves...
April 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29595735/a-new-composite-eyeball-periorbital-transplantation-model-in-humans-an-anatomical-study-in-preparation-for-eyeball-transplantation
#14
Maria Siemionow, Mehmet Bozkurt, Fatih Zor, Yalcin Kulahci, Safak Uygur, Can Ozturk, Risal Djohan, Frank Papay
BACKGROUND: Vascularized composite allotransplantation offers a new hope for restoration of orbital content and perhaps vision. The aim of this study was to introduce a new composite eyeball-periorbital transplantation model in fresh cadavers in preparation for composite eyeball allotransplantation in humans. METHODS: The composite eyeball-periorbital transplantation flap borders included the inferior border, outlined by the infraorbital rim; the medial border, created by the nasal dorsum; the lateral border, created by the lateral orbital rim; and the superior border, created by the superior part of the eyebrow...
April 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29594083/large-parotid-gland-lipoblastoma-in-a-teenager
#15
Danny Jandali, Ashley Heilingoetter, Ritu Ghai, Jill Jeffe, Samer Al-Khudari
Background: Lipoblastomas are rare benign neoplasms that arise from fetal white fat cells. They are typically found in children under the age of 3 and have been reported in the mediastinum, extremities, and infrequently in the head and neck. We present a rare case of a lipoblastoma arising from the parotid gland and the first known report of a parotid lipoblastoma in a teenager. Case presentation: A 15-year-old male presented with a painless, slowly enlarging parotid mass and left facial swelling...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29588250/a-novel-role-for-lymphotactin-xcl1-signalling-in-the-nervous-system-xcl1-acts-via-its-receptor-xcr1-to-increase-trigeminal-neuronal-excitability
#16
Emma V Bird, Tommaso Iannitti, Claire R Christmas, Ilona Obara, Veselin I Andreev, Anne E King, Fiona M Boissonade
Chemokines are known to have a role in the nervous system, influencing a range of processes including the development of chronic pain. To date there are very few studies describing the functions of the chemokine lymphotactin (XCL1) or its receptor (XCR1) in the nervous system. We investigated the role of the XCL1-XCR1 axis in nociceptive processing, using a combination of immunohistochemical, pharmacological and electrophysiological techniques. Expression of XCR1 in the rat mental nerve was elevated 3 days following chronic constriction injury (CCI), compared with 11days post-CCI and sham controls...
March 24, 2018: Neuroscience
https://www.readbyqxmd.com/read/29582417/dissecting-the-spinal-nop-receptor-distribution-under-a-chronic-pain-model-using-nop-egfp-knock-in-mice
#17
Akihiko Ozawa, Gloria Brunori, Andrea Cippitelli, Nicholas Toll, Jennifer Schoch, Brigitte L Kieffer, Lawrence Toll
BACKGROUND AND PURPOSE: The Nociceptin/orphanin FQ Opioid Peptide (NOP) receptor system plays a significant role in the regulation of pain, and functions differently in the spinal cord and brain. The mechanism by which the NOP receptor agonists regulate pain transmission in these regions is not clearly understood. Here we investigate the peripheral and spinal NOP receptor distribution and antinociceptive effects of intrathecally (i.t) administered nociceptin/orphanin FQ (N/OFQ) under chronic neuropathic pain state...
March 26, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29580331/superficial-peroneal-nerve-injured-during-fasciotomy-a-successful-repair-with-cadaveric-nerve-allograft
#18
Joseph Ogrodnik
No abstract text is available yet for this article.
February 1, 2018: American Surgeon
https://www.readbyqxmd.com/read/29580153/peripheral-nerve-injury-increases-contribution-of-l-type-calcium-channels-to-synaptic-transmission-in-spinal-lamina-ii-role-of-%C3%AE-2%C3%AE-1-subunits
#19
Sascha Ra Alles, Esperanza Garcia, Sridhar Balasubramanyan, Karen Jones, John R Tyson, Twinkle Joy, Terrance P Snutch, Peter A Smith
Background Following peripheral nerve chronic constriction injury, the accumulation of the α2δ-1 auxiliary subunit of voltage-gated Ca2+ channels in primary afferent terminals contributes to the onset of neuropathic pain. Overexpression of α2δ-1 in Xenopus oocytes increases the opening properties of Cav 1.2 L-type channels and allows Ca2+ influx at physiological membrane potentials. We therefore posited that L-type channels play a role in neurotransmitter release in the superficial dorsal horn in the chronic constriction injury model of neuropathic pain...
January 2018: Molecular Pain
https://www.readbyqxmd.com/read/29576929/customizing-perimetric-locations-based-on-en-face-images-of-retinal-nerve-fiber-bundles-with-glaucomatous-damage
#20
Muhammed S Alluwimi, William H Swanson, Victor E Malinovsky, Brett J King
Purpose: Prior studies suggested the use of customized perimetric locations in glaucoma; these studies were limited by imaging only the superficial depths of the retinal nerve fiber layer (RNFL) and by prolonged perimetric testing. We aimed to develop a rapid perimetric test guided by high-resolution images of RNFL bundles. Methods: We recruited 10 patients with glaucoma, ages 56 to 80 years, median 68 years, and 10 controls, ages 55 to 77 years, median 68 years...
March 2018: Translational Vision Science & Technology
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