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Abducens Nerve

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https://www.readbyqxmd.com/read/29447480/intramuscular-distribution-of-the-abducens-nerve-in-the-lateral-rectus-muscle-for-the-management-of-strabismus
#1
Hyun Jin Shin, Shin-Hyo Lee, Kang-Jae Shin, Ki-Seok Koh, Wu-Chul Song
AIMS: To elucidate the intramuscular distribution and branching patterns of the abducens nerve in the lateral rectus (LR) muscle so as to provide anatomical confirmation of the presence of compartmentalization, including for use in clinical applications such as botulinum toxin injections. METHODS: Thirty whole-mount human cadaver specimens were dissected and then Sihler's stain was applied. The basic dimensions of the LR and its intramuscular nerve distribution were investigated...
February 15, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29446798/life-threatening-headaches-in-children-clinical-approach-and-therapeutic-options
#2
Nagma Dalvi, Lalitha Sivaswamy
Life-threatening headaches in children can present in an apoplectic manner that garners immediate medical attention, or in an insidious, more dangerous form that may go unnoticed for a relatively long period of time. The recognition of certain clinical characteristics that accompany the headache should prompt recognition and referral to an institution equipped with neuroimaging facilities, pediatric neurosurgeons, and neurologists. Thunderclap headaches, which reach a peak within a very short period of time, may be the presenting feature of conditions such as arterial dissection, venous sinus thrombosis, and reversible cerebral vasoconstriction syndrome, which can be addressed by specific pharmacological options instituted in an intensive care setting...
February 1, 2018: Pediatric Annals
https://www.readbyqxmd.com/read/29424937/pathogenesis-of-cranial-neuropathies-in-moebius-syndrome-electrodiagnostic-orofacial-studies
#3
Francis Renault, Roberto Flores-Guevara, Bernard Sergent, Jean Jacques Baudon, Jessie Aouizerate, Marie-Paule Vazquez, Cyril Gitiaux
INTRODUCTION: We designed a retrospective study of 59 patients with congenital sporadic non-progressive bilateral facial and abducens palsies. METHODS: Examinations included needle EMG of facial and oral muscles, facial nerve motor latency and conduction velocity (FNCV), and blink responses (BRs). RESULTS: Neurogenic EMG changes were found in one or more muscles in 55/59 patients, with no abnormal spontaneous activity. EMG changes were homogeneously neurogenic in 17 patients, homogeneously myopathic in one, and heterogeneous in 41/59 patients...
February 9, 2018: Muscle & Nerve
https://www.readbyqxmd.com/read/29408345/novel-segmentation-of-placed-coils-in-the-treatment-of-cavernous-sinus-dural-arteriovenous-fistulas-provides-a-reliable-predictor-of-the-long-term-outcome-in-abducens-nerve-palsy
#4
Masaaki Kohta, Atsushi Fujita, Jun Tanaka, Takashi Sasayama, Kohkichi Hosoda, Eiji Kohmura
No abstract text is available yet for this article.
February 2, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29386499/-a-case-of-lyme-neuroborreliosis-without-erythema-migrans
#5
Katsuki Eguchi, Kazuhumi Tsuzaka, Ichiro Yabe, Hidenao Sasaki
A 56-year-old man was sustained ticks at the left axilla and flank. He did not have a rash. About 3 months after the tick bites, he developed back pain, right leg weakness, right abducens nerve palsy, and left facial palsy. Western blot analysis for serum IgM and IgG antibodies against Borrelia were positive. We diagnosed Lyme borreliosis. The patient was treated with antibiotics and steroids, and the symptoms improved. Our findings demonstrate that, even if erythema migrans is not obvious, neuroborreliosis should be considered when neurological signs, such as multiple cranial nerve palsies, are present...
January 31, 2018: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/29386492/-a-case-of-neurolymphomatosis-that-was-diagnosed-by-acoustic-nerve-biopsy
#6
Asuka Asanome, Kohei Kano, Kae Takahashi, Tsukasa Saito, Jun Sawada, Takayuki Katayama
A 58-year-old female was admitted to our hospital because of recurrent multiple cranial neuropathy (right facial palsy followed by involvement of the left trigeminal, facial, acoustic, pharyngeal, and vagal nerves and the right abducens nerve). Brain MRI showed gadolinium enhancement of the right abducens, bilateral facial/acoustic, and left pharyngeal/vagal nerves, and 18F-Fluorodeoxyglucose (FDG)-positron emission tomography revealed abnormal FDG uptake in the right facial, acoustic, pharyngeal, and vagal nerves and the left cervical lymph nodes...
January 31, 2018: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/29376441/spontaneous-haemorrhage-into-a-large-abducens-nerve-schwannoma-a-case-report
#7
Daniel Brown, Nicolas McConnell, Richard List, Farouk Olubajo, Robin Highley, Mathew Storey, Gueorgui Kounin
PURPOSE: Abducens schwannomas are rare tumors that are not known to present with acute haemorrhage. We present a case of a 59 year-old female on warfarin who presented acutely with a sudden onset headache, nausea and photophobia. Neuroimaging revealed an acute haemorrhage into a lesion that entered Dorello's canal and was consistent with an abducens nerve schwannoma. MATERIALS AND METHODS: The patient's case notes, imaging, histology and operative recording were reviewed retrospectively to compile this case report...
January 29, 2018: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29344066/diagnostic-challenge-sequential-unilateral-cranial-neuropathies-due-to-perineural-spread-of-carcinoma
#8
Heather E Moss, Peter W MacIntosh, Konstantin V Slavin, John M Collins
An 86-year old man developed sequential dysfunction of trigeminal (V1), facial, abducens, trigeminal (v2), oculomotor, and hypoglossal cranial nerves on the right over 20 months. Magnetic resonance imaging (MRI) showed a lesion in the right cavernous sinus. Although there was clinical suspicion that this was related to perineural spread of an extracranial tumour, a primary lesion was not discovered. Stereotactic biopsies of the intracranial lesion were non-diagnostic, and the patient succumbed to his tumour following a period of rapid growth...
August 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/29341940/mucocele-of-the-sphenoid-sinus
#9
Karen B Djambazov, Borislav D Kitov, Christo B Zhelyazkov, Atanas N Davarski, Alexandrina R Topalova
Mucocele of the paranasal sinuses is a rare disease with slow evolution. It is a benign, encapsulated and destructive formation filled with mucous fluid and tapistrated with respiratory epithelium. Of all the paranasal sinuses, the sphenoid sinus is affected in only 1-7% of the cases. We present two cases of mucocele of the sphenoid sinus involving the posterior ethmoidal cells. We consider here their clinical presentation, use of neuroimaging in the diagnosis, surgical care and postoperative results. Both patients presented with a history of persistent headache and in addition, one of them had a paresis of the right oculomotor and abducens nerves...
December 20, 2017: Folia Medica
https://www.readbyqxmd.com/read/29298208/electrophysiology-of-extraocular-cranial-nerves-oculomotor-trochlear-and-abducens-nerve
#10
Praveen Hariharan, Jeffery R Balzer, Katherine Anetakis, Donald J Crammond, Parthasarathy D Thirumala
The utility of extraocular cranial nerve electrophysiologic recordings lies primarily in the operating room during skull base surgeries. Surgical manipulation during skull base surgeries poses a risk of injury to multiple cranial nerves, including those innervating extraocular muscles. Because tumors distort normal anatomic relationships, it becomes particularly challenging to identify cranial nerve structures. Studies have reported the benefits of using intraoperative spontaneous electromyographic recordings and compound muscle action potentials evoked by electrical stimulation in preventing postoperative neurologic deficits...
January 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29260052/spasm-of-the-near-reflex-a-case-report
#11
Maedbh Rhatigan, Caroline Byrne, Patricia Logan
Purpose: Spasm of the near reflex (SNR) is a triad of miosis, excess accommodation and excess convergence. Primary SNR is most often functional in origin We aim to highlight the clinical features which distinguish primary convergence from other conditions with a similar presentation but more sinister underlying aetiology, for example bilateral abducens nerve palsy. Observations: There is a paucity of published data on SNR, in particular diagnostic criteria and treatment...
June 2017: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29223524/gamma-knife-stereotactic-radiosurgery-for-non-vestibular-cranial-nerve-schwannomas
#12
Anne-Marie Langlois, Christian Iorio-Morin, Laurence Masson-Côté, David Mathieu
BACKGROUND: Non-vestibular cranial schwannomas represent a rare type of benign intracranial tumor. Few studies have evaluated the use of stereotactic radiosurgery (SRS) as a primary management option for these lesions. We therefore performed a retrospective review of our institution's experience focussing on efficacy with regards to tumor control and clinical symptom stabilization, as well as treatment safety. METHODS: Patients were included if they underwent at least one SRS procedure for a non-vestibular schwannoma and had at least 6 months of available imaging follow-up...
December 6, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29212484/clinical-features-of-visual-disturbances-secondary-to-isolated-sphenoid-sinus-inflammatory-diseases
#13
Lanlan Chen, Libin Jiang, Bentao Yang, Prem S Subramanian
BACKGROUND: Visual disturbances associated with isolated sphenoid sinus inflammatory diseases (ISSIDs) are easily misdiagnosed due to the nonspecific symptoms and undetectable anatomical location. The main objective of this retrospective case series is to investigate the clinical features of visual disturbances secondary to ISSIDs. METHODS: Clinical data of 23 patients with unilateral or bilateral visual disturbances secondary to ISSIDs from 2004 to 2014 with new symptoms were collected...
December 6, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29199032/surgical-outcome-of-superior-rectus-transposition-in-esotropic-duane-syndrome-and-abducens-nerve-palsy
#14
Rohit Agarwal, Medha Sharma, Rohit Saxena, Pradeep Sharma
PURPOSE: To evaluate surgical outcome of superior rectus transposition (SRT) in esotropic Duane syndrome (DS) and abducens nerve palsy. METHODS: Retrospective medical record analysis of all patients with esotropic DS and abducens nerve palsy treated with SRT at our center with minimum follow-up of 6 months. Primary outcome measures were esotropia in primary position and abduction limitation. Secondary outcome measures included head turn, stereopsis, and cyclovertical deviations...
November 30, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/29174523/transvenous-coil-embolization-for-the-treatment-of-carotid-cavernous-fistula-after-pipeline-placement-a-case-report
#15
Ryuta Nakae, Masaya Nagaishi, Issei Takano, Yoshihiro Tanaka, Akio Hyodo, Kensuke Suzuki
The Pipeline embolization device (PED), a type of flow diverter, has become an appealing alternative treatment option for large or giant and wide-necked intracranial aneurysms. Carotid cavernous fistula (CCF) resulting from delayed aneurysmal rupture is a rare complication of PED placement with unknown pathophysiology. Here, we describe a case of CCF resulting from aneurysmal rupture following PED placement, and present the details of treatment by transvenous coil embolization. An 81-year-old woman was referred to our hospital for treatment of an 18...
November 22, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29158094/supernumerary-abducens-nerves-a-comprehensive-review
#16
REVIEW
Joy Mh Wang, Bryan Adam Edwards, Marios Loukas, Rod J Oskouian, R Shane Tubbs
Branching and/or replication of the abducens nerve is not an uncommon occurrence. While numerous variations have been documented, the rarest forms are duplicated or triplicated nerves, where multiple nerve roots originate from the brain stem, travel intracranially and attach to the lateral rectus as separate entities. Herein, we will review the literature on variations found, discuss current hypotheses and clinical relevance, and propose future studies. Neurosurgeons should be aware of such nerve variants when viewing imaging or operating in the regions traversed by the abducens nerve...
November 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29156469/-efficacy-of-vertical-muscle-transpositions-with-and-without-simultaneous-rectus-muscle-recession-for-unilateral-sixth-nerve-palsy
#17
Andrea M Hedergott, Dana Wild, Julia Fricke, Antje Neugebauer
Background We report results of a modified vertical muscle transposition procedure according to the Hummelsheim principle - with and without simultaneous rectus muscle recession - for unilateral sixth nerve palsy. We examine the influence of the duration of the palsy, preoperative angle of squint and preoperative abductive capacity on surgical results of the procedures. Patients and Methods Retrospective study of 29 consecutive patients with unilateral abducens nerve palsy who underwent surgery between 2001 and 2012...
November 20, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29153254/facial-reanimation-surgery-in-m%C3%A3-bius-syndrome-experience-from-76-cases-from-a-tertiary-referral-hospital-in-latin-america
#18
A Cardenas-Mejia, D Palafox
INTRODUCTION: Möbius syndrome is defined as a combined congenital bilateral facial and abducens nerve palsies. The main goal of treatment is to provide facial reanimation by means of a dynamic surgical procedure. The microneurovascular transfer of a free muscle transplant is the procedure of choice for facial animation in a child with facial paralysis. OBSERVATION: Between January 2008 and January 2017, 124 patients with the syndrome have been approached at our institution...
November 15, 2017: Annales de Chirurgie Plastique et Esthétique
https://www.readbyqxmd.com/read/29135718/case-report-adenocarcinoma-of-the-lacrimal-gland-presenting-as-an-abduction-deficit
#19
Crystal L DeLuca, Regina E Zimmers
SIGNIFICANCE: It is imperative to follow the clinical guidelines for abduction deficits to ensure prompt diagnosis of potentially serious etiologies and monitor only those in which a microvascular etiology is most likely. This case reports highlights a rare diagnosis of a malignant tumor of the lacrimal gland presenting as an abduction deficit. PURPOSE: Tumors of the lacrimal gland can cause abduction deficits, which may mimic an abducens nerve palsy. Abducens nerve palsies are often encountered by optometrists...
November 11, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29132416/distinct-functional-consequences-of-ecel1-dine-missense-mutations-in-the-pathogenesis-of-congenital-contracture-disorders
#20
Kenichi Nagata, Mika Takahashi, Sumiko Kiryu-Seo, Hiroshi Kiyama, Takaomi C Saido
Endothelin-converting enzyme-like 1 (ECEL1, also termed DINE in rodents), a membrane-bound metalloprotease, has been identified as a gene responsible for distal arthrogryposis (DA). ECEL1-mutated DA is generally characterized by ocular phenotypes in addition to the congenital limb contractures that are common to all DA subtypes. Until now, the consequences of the identified pathogenic mutations have remained incompletely understood because of a lack of detailed phenotypic analyses in relevant mouse models. In this study, we generated a new knock-in mouse strain that carries an ECEL1/DINE pathogenic G607S missense mutation, based on a previous study reporting atypical DA hindlimb phenotypes in two siblings with the mutation...
November 13, 2017: Acta Neuropathologica Communications
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