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https://www.readbyqxmd.com/read/29649046/range-of-peak-head-velocity-in-video-head-impulse-testing-for-pediatric-patients
#1
Guangwei Zhou, Cassandra Goutos, Sophie Lipson, Jacob Brodsky
OBJECTIVE: To examine peak head velocity in video head impulse testing of pediatric patients and its effect on vestibulo-ocular reflex (VOR) gain. STUDY DESIGN: Retrospective case review. SETTING: Tertiary referral center. PATIENTS: Pediatric patients ages 3 to 18 years old who underwent video head impulse testing during clinical evaluation of dizziness and/or imbalance. INTERVENTION(S): Conducted video head impulse test (vHIT) in horizontal, left anterior-right posterior (LARP), and right anterior-left posterior (RALP) planes...
April 11, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29627590/exploring-experimental-autoimmune-optic-neuritis-using-multimodal-imaging
#2
Praveena Manogaran, Christine Walker-Egger, Marijana Samardzija, Conny Waschkies, Christian Grimm, Markus Rudin, Sven Schippling
BACKGROUND: Neuro-axonal injury is a key contributor to non-reversible long-term disability in multiple sclerosis (MS). However, the underlying mechanisms are not yet fully understood. Visual impairment is common among MS patients, in which episodes of optic neuritis (ON) are often followed by structural retinal damage and sustained functional impairment. Alterations in the optic nerve and retina have also been described in rodent experimental autoimmune encephalomyelitis (EAE), a model of MS...
April 5, 2018: NeuroImage
https://www.readbyqxmd.com/read/29625480/microvascular-density-is-associated-with-retinal-ganglion-cell-axonal-volume-in-the-laminar-compartments-of-the-human-optic-nerve-head
#3
Min H Kang, Mengchen Suo, Chandrakumar Balaratnasingam, Paula K Yu, William H Morgan, Dao-Yi Yu
Purpose: To quantify associations between microvascular density and retinal ganglion cell (RGC) axonal volume in the laminar compartments of the human optic nerve head (ONH). Methods: Eleven normal human ONHs were evaluated. Antibodies were used to label the vascular endothelium (factor VIII-related antigen/von Willebrand factor antibody) and RGC axons (neurofilament heavy antibody). Three-dimensional analysis of confocal scanning laser microscope images was used to study microvascular density and RGC axonal volume in the prelaminar, anterior lamina cribrosa, posterior lamina cribrosa, and retrolaminar compartments...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29625414/regulation-of-quasi-joint-stiffness-by-combination-of-activation-of-ankle-muscles-in-midstances-during-gait-in-patients-with-hemiparesis
#4
Yusuke Sekiguchi, Takayuki Muraki, Dai Owaki, Keita Honda, Shin-Ichi Izumi
BACKGROUND: The regulation of ankle joint stiffness by combination of activation of plantarflexor and dorsiflexor during gait has not been investigated in patients with hemiparesis. The objective of the present study was to examine the relationship between combination of activation of ankle muscles and quasi-joint stiffness (QJS) during the stance phase of gait. METHODS: The activation of the medial head of the gastrocnemius (MG), soleus, and tibialis anterior, gait parameters were collected from 19 patients with hemiparesis due to stroke and from 12 healthy controls using a three-dimensional motion analysis system...
March 28, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29625080/the-effects-of-age-on-mitochondria-axonal-transport-and-axonal-degeneration-after-chronic-iop-elevation-using-a-murine-ocular-explant-model
#5
Elizabeth C Kimball, Joan L Jefferys, Mary E Pease, Ericka N Oglesby, Cathy Nguyen, Julie Schaub, Ian Pitha, Harry A Quigley
The purpose of this study was to compare younger and older mice after chronic intraocular pressure (IOP) elevation lasting up to 4 days with respect to mitochondrial density, structure, and movement, as well as axonal integrity, in an ex vivo explant model. We studied 2 transgenic mouse strains, both on a C57BL/6J background, one expressing yellow fluorescent protein (YFP) in selected axons and one expressing cyan fluorescent protein (CFP) in all mitochondria. Mice of 4 months or 14 months of age were exposed to chronic IOP by anterior chamber microbead injection for 14 h, 1, 3, or 4 days...
April 3, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29624691/early-developmental-and-allometric-patterns-in-the-electric-yellow-cichlid-labidochromis-caeruleus
#6
M Saemi-Komsari, H Mousavi-Sabet, C F Kratochwil, M Sattari, S Eagderi, A Meyer
The electric yellow cichlid Labidochromis caeruleus is a mouth-brooding haplochromine cichlid from Lake Malawi and one of the most popular cichlids in the ornamental fish industry. To investigate the early development of L. caeruleus from hatching until the juvenile stage, we studied its morphological development and allometric growth patterns. In newly-hatched larvae, most organs and body parts were not yet differentiated and continued to develop until 15 days post hatching (dph). The yolk sac was depleted at 13 dph...
April 6, 2018: Journal of Fish Biology
https://www.readbyqxmd.com/read/29622088/re-description-of-the-sperm-morphology-of-dalbulus-maidis-hemiptera-cicadellidae-deltocephalinae
#7
Marcelo Silva Barcellos, Glenda Dias, José Lino-Neto
The corn leafhopper, Dalbulus maidis, which is one of the most important vectors of maize diseases, had the morphology of its spermatozoa described more than 40 years ago. However, the description is imprecise, requiring certain rectifications. Hence, we re-describe the sperm morphology of this species using light microscopy and transmission electron microscopy. Their spermatozoa measured from 118.1 to 128.5 μm in length, this value being about three times smaller than what was previously described. The head region is formed by a small acrosome and the nucleus...
April 2018: Tissue & Cell
https://www.readbyqxmd.com/read/29621873/set-up-errors-in-head-and-neck-cancer-treated-with-imrt-technique-assessed-by-cone-beam-computed-tomography-a-feasible-protocol
#8
Durim Delishaj, Stefano Ursino, Francesco Pasqualetti, Fabrizio Matteucci, Agostino Cristaudo, Carlo Pietro Soatti, Amelia Barcellini, Fabiola Paiar
PURPOSE: To investigate set-up errors, suggest the adequate planning target volume (PTV) margin and image-guided radiotherapy frequency in head and neck (H&N) cancer treated with intensity-modulated radiotherapy (IMRT) assessed by kV cone-beam computed tomography (CBCT). METHODS: We analyzed 360 CBCTs in 60 patients with H&N cancer treated with IMRT. The target delineation was contoured according to ICRU62. PTVs were generated by adding a 3-5 mm margin in all directions to the respective clinical target volumes...
March 2018: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29621028/risk-of-perforation-is-high-during-corrective-reaming-of-retroverted-glenoids-a-computer-simulation-study
#9
Alexander W Aleem, Nathan D Orvets, Brendan C Patterson, Aaron M Chamberlain, Jay D Keener
BACKGROUND: Corrective anterior reaming is an accepted method for addressing retroversion in a biconcave retroverted (Walch classification, type B2) glenoid in anatomic total shoulder arthroplasty. However, concern still exists regarding early glenoid component failure in the setting of severe retroversion, which may be related to loss of component containment and/or violation of subchondral bone resulting from reaming. The goal of this study was to determine what characteristics of B2 glenoids are less amenable to corrective reaming by virtually implanting anatomic glenoid components...
April 4, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29620515/progress-in-the-diagnosis-and-management-of-chorea-acanthocytosis
#10
Yang Liu, Zi-Yuan Liu, Xin-Hua Wan, Yi Guo
Chorea-acanthocytosis (ChAc) is the most common subtype of neuroacanthocytosis syndrome, characterized by the presence of acanthocytes and neurological disorders. It is thought to be caused by VPS13A mutations. Characteristic movement disorders in ChAc is choreiform movements affecting both trunk and extremities and prominent orolingual dyskinesia is pathognomonic. Acanthocytosis in peripheral blood smear, elevated serum creatine kinase and atrophy of heads of caudate nuclei and dilation of the anterior horn of the lateral ventricles in magnetic resonance imaging could assist the diagnosis of ChAc...
March 30, 2018: Chinese Medical Sciences Journal, Chung-kuo i Hsüeh K'o Hsüeh Tsa Chih
https://www.readbyqxmd.com/read/29617854/microsurgical-treatment-of-bowhunter-s-syndrome-3-dimensional-operative-video
#11
Vijay Agarwal, Daniel L Barrow
We present the case of a 56-yr-old previously healthy male who presented with an approximately 1-yr history of intermittent dizziness, near syncope, and holocephalic headaches when turning his head to the left side for a prolonged period of time. He had a distant history of a previous anterior cervical discectomy and fusion at the C6-7 level. He was neurologically intact. Static, dynamic, and vascular imaging confirmed hypoplasia of the right vertebral artery and dominance of the left vertebral artery that completely filled the posterior circulation...
March 29, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29616086/kissing-aneurysms-of-the-distal-anterior-cerebral-artery-a-case-report-and-literature-review
#12
Chuan-Yi Fu, Jian-Long Chen, Zhao-Hui Liu, Peng-Cheng Wang, Chuan-Zhi Duan, Jian-Nong Zhao
Intracranial 'kissing' aneurysms are rare types of multiple aneurysms referring to two adjacent aneurysms arising from identical or different arteries with separate origins and partially adherent walls. The present study reported a 54-year-old female patient, who was identified with a 'kissing' aneurysm in the A3 segment of the bilateral anterior cerebral arteries, as demonstrated by head computed tomography and emergency cerebral digital subtraction angiography analysis. In total, 12 days following the clipping of the aneurysms, the patient was discharged with a Modified Rankin Scale=0 and recovered well with no neurological deficits...
April 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29615567/the-roles-of-the-wnt-antagonists-axin-and-lrp4-during-embryogenesis-of-the-red-flour-beetle-tribolium-castaneum
#13
Romy Prühs, Anke Beermann, Reinhard Schröder
In both vertebrates and invertebrates, the Wnt-signaling pathway is essential for numerous processes in embryogenesis and during adult life. Wnt activity is fine-tuned at various levels by the interplay of a number of Wnt-agonists (Wnt ligands, Frizzled-receptors, Lrp5/6 coreceptors) and Wnt-antagonists (among them Axin, Secreted frizzled and Lrp4) to define anterior-posterior polarity of the early embryo and specify cell fate in organogenesis. So far, the functional analysis of Wnt-pathway components in insects has concentrated on the roles of Wnt-agonists and on the Wnt-antagonist Axin...
October 15, 2017: Journal of Developmental Biology
https://www.readbyqxmd.com/read/29599172/submandibular-gland-transfer-a-potential-imaging-pitfall
#14
X Wu, S S Yom, P K Ha, C M Heaton, C M Glastonbury
BACKGROUND AND PURPOSE: The Seikaly and Jha submandibular gland transfer surgery is performed to facilitate gland shielding during radiation therapy for head and neck tumors to circumvent radiation-induced xerostomia. It results in an asymmetric postsurgical appearance of the submandibular and submental spaces. Our purpose was to characterize the morphologic and enhancement characteristics of the transferred submandibular gland and identify potential pitfalls in postoperative radiologic interpretation...
March 29, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29589980/le-fort-iii-distraction-with-internal-vs-external-distractors-a-cephalometric-analysis
#15
Kevin J Robertson, Bernardino M Mendez, William J Bruce, Brendan D McDonnell, Michael V Chiodo, Parit A Patel
OBJECTIVE: This study compares the change in midface position following Le Fort III advancement using either rigid external distraction (group 1) or internal distraction (group 2). We hypothesized that, with reference to right-facing cephalometry, internal distraction would result in increased clockwise rotation and inferior displacement of the midface. DESIGN: Le Fort III osteotomies and standardized distraction protocols were performed on 10 cadaveric specimens per group...
January 1, 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29588902/gross-total-resection-of-chordoid-glioma-of-the-third-ventricle-via-anterior-interhemispheric-transcallosal-transforaminal-approach-at-two-stages
#16
Ihsan Dogan, Melih Ucer, Mustafa Kemal Başkaya
Suprasellar tumors in particular tumors located in the retrochiasmatic area and anterior third ventricle are challenging cases in terms of optimal surgical exposure. Several approaches have been described including transsylvian, translamina terminalis, endoscopic endonasal, and anterior interhemispheric. Each approach has advantages and disadvantages. In this video, we present a case of retrochiasmatic anterior third ventricular tumor that was operated via anterior interhemispheric transcallosal transforaminal approach...
April 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29588891/transcallosal-transchoroidal-resection-of-a-recurrent-craniopharyngioma
#17
Walter C Jean
Objective  To demonstrate the transchoroidal approach for the resection of a recurrent craniopharyngioma. Design  Video case report. Setting  Microsurgical resection. Participant  The patient was a 27-year-old woman with a history of a craniopharyngioma, resected twice during the year prior to presentation to our unit. Both operations were done via the left anterolateral corridor, and afterward, she was blind in the left eye and was treated with Desmopressin (DDAVP) for diabetes insipidus (DI). Serial magnetic resonance imaging (MRI) showed progression of the tumor residual, and she was referred for further surgical intervention...
April 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29581658/effect-of-interferential-current-therapy-on-forward-head-posture
#18
Ye-Jin Choi, Hee-Jung Kim, Sun-Young Han, Bo-Ram Choi
[Purpose] The purpose of this study was to examine the effects of interferential current therapy on the shoulder muscles of subjects with forward head posture. [Subjects and Methods] Thirty volunteers (15 forward head posture, 15 control) participated in this study. Interferential current therapy treatment was conducted for 10 min, three times per week, for 3 weeks on both the upper trapezius and levator scapulae. Subjects were measured anterior both acromion distance and posterior both acromial distance using a ruler, and the forward head posture angle using an electronic application...
March 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29580744/anthropometric-study-of-the-radiocapitellar-joint
#19
Matthias Vanhees, Dave R Shukla, James S Fitzsimmons, Kai-Nan An, Shawn W O'Driscoll
PURPOSE: There is scant knowledge about the relationship between the size of the radial head and the size of the capitellum. Also, no data exist comparing the size of the capitellum between the left and the right elbow. METHODS: Eight pairs of elbows and 12 single elbows from fresh-frozen cadavers were obtained for this study. The vertical height and anterior width of the capitellum were measured with digital calipers. Four different measurements were performed at the radial head: longest outer diameter, shortest outer diameter, the long dish diameter, and short dish diameter...
March 23, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29577103/traumatic-chiasmal-syndrome-a-meta-analysis
#20
Loganathan Vellayan Mookan, Philip A Thomas, Ankit Anil Harwani
Purpose: To report a case presenting with bitemporal hemianopia due to traumatic chiasmal syndrome after head injury, and to compare the findings with individual case reports published in the literature. Methods: A detailed search was made in PubMed, MedIND, Taylor and Francis online and Wiley online library databases for individual case reports of traumatic chiasmal syndrome. All the case reports were read in full and the findings summarized in a table, which included details of the case who presented with bitemporal hemianopia as an index case...
March 2018: American Journal of Ophthalmology Case Reports
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