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Abducens Nerve

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https://www.readbyqxmd.com/read/28766024/usefulness-of-intraoperative-electromyographic-monitoring-of-oculomotor-and-abducens-nerves-during-skull-base-surgery
#1
Zi-Yi Li, Ming-Chu Li, Jian-Tao Liang, Yu-Hai Bao, Ge Chen, Hong-Chuan Guo, Feng Ling
BACKGROUND: Intraoperative neurophysiologic monitoring of the extraocular cranial nerve (EOCN) is not commonly performed because of technical difficulty and risk, reliability of the result and predictability of the postoperative function of the EOCN. METHODS: We performed oculomotor nerve (CN III) and abducens nerve (CN VI) intraoperative monitoring in patients with skull base surgery by recording the spontaneous muscle activity (SMA) and compound muscle action potential (CMAP)...
August 2, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28761510/a-systematic-review-about-the-position-related-complications-of-acoustic-neuroma-surgery-via-suboccipital-retrosigmoid-approach-sitting-versus-lateral
#2
REVIEW
Mahdi Safdarian, Manouchehr Safdarian, Roger Chou, Seyed Mahmoud Ramak Hashemi, Vafa Rahimi-Movaghar
This systematic review wasdesigned to compare the complications of acoustic neuroma surgery via the suboccipital retrosigmoid approach in the sitting versus lateral positions. Searches for randomized trials and observational studies about the complications of acoustic neuroma surgery were performed in five medical databases (though October 2015) including PubMed, MEDLINE (In-Process and Other Non-Indexed Citations), EMBASE, Cochrane Central Register of Controlled Trials (CENTRAL) and PsycINFO. Primary outcomes in this study were venous air emboli, neuropsychological defects, CSF leak, facial and abducens nerves palsy, postoperative deafness, hydrocephalus and mortality...
July 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28759288/neurological-imaging-in-acquired-cranial-nerve-palsy-ophthalmologists-vs-neurologists
#3
Tessa Klein Hesselink, Mari Gutter, Jan Roelof Polling
PURPOSE: Cranial nerve palsies often require neurological imaging by MRI. Guidelines on whether or not to utilize MRI have been absent or lack clarity. In daily practice, both neurologists and ophthalmologists treat patients with cranial nerve palsy and determine whether neuro-imaging is required. There appear to be differences in policy with respect to neuro-imaging. The question, which will be answered in this study, is the following: to what extent do differences in policy exist between ophthalmologists and neurologists regarding imaging by MRI of patients with acquired ocular cranial nerve palsy? METHOD: PubMed database was searched for literature on acquired cranial nerve palsy and MRI scanning performed by ophthalmologists and neurologists...
July 31, 2017: Strabismus
https://www.readbyqxmd.com/read/28744196/extraocular-motor-system-exhibits-a-higher-expression-of-neurotrophins-when-compared-with-other-brainstem-motor-systems
#4
Rosendo G Hernández, Silvia Silva-Hucha, Sara Morcuende, Rosa R de la Cruz, Angel M Pastor, Beatriz Benítez-Temiño
Extraocular motoneurons resist degeneration in diseases such as amyotrophic lateral sclerosis. The main objective of the present work was to characterize the presence of neurotrophins in extraocular motoneurons and muscles of the adult rat. We also compared these results with those obtained from other cranial motor systems, such as facial and hypoglossal, which indeed suffer neurodegeneration. Immunocytochemical analysis was used to describe the expression of nerve growth factor, brain-derived neurotrophic factor and neurotrophin-3 in oculomotor, trochlear, abducens, facial, and hypoglossal nuclei of adult rats, and Western blots were used to describe the presence of neurotrophins in extraocular, facial (buccinator), and tongue muscles, which are innervated by the above-mentioned motoneurons...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28728290/-advances-in-research-of-divergence-insufficiency
#5
Y P Li, W Zhang
Divergence insufficiency is acquired esotropia at distance fixation with symptomatic uncrossed diplopia but fusion at near. It can be divided into two forms: primary isolated form and secondary form associated with neurologic abnormalities, also called divergence palsy. The clinical features of divergence insufficiency include small esotropia only at distance but orthotropia or small esophoria at near, comitant deviation at lateral gaze, reduced divergence fusion, full abduction and normal saccadic velocities in abduction...
July 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28724831/no-split-no-tenotomy-transposition-procedure-for-complete-abducens-palsy
#6
Sowmya Raveendra Murthy
Abducens palsy is one of the commonly encountered cranial nerve palsies in strabismus clinic. For large-angle esotropia, due to complete abducens palsies, various vertical recti transposition (VRT) procedures have been described. Hummelsheim and Jensen's procedure are especially popular among them. Risk of anterior segment ischemia and induced vertical deviation postVRT prompt to search for better procedures to correct the esotropia and also improve the abduction. Modified Nishida's procedure (no split, no tenotomy transposition) is one of the newly described procedure in this direction...
July 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28720403/gradenigo-s-syndrome-a-case-of-a-common-infection-with-uncommon-consequences
#7
Matthew Vitale, Misra Amrit, Rajan Arora, Julie Lata
Acute otitis media is a common diagnosis encountered by emergency medicine providers. With appropriate antibiotic treatment, patients with otitis media, in general, have minimal long-term sequela from their underlying infection (Limb et al., 2017 [1]). However, untreated cases can develop life-threatening complications that require prompt intervention. We report a case of an 8-year-old that developed Gradenigo's syndrome, a condition characterized by the triad of otitis media, facial pain in the distribution of the trigeminal nerve, and abducens nerve palsy (Yeung and Lustig, 2016; Janjua et al...
July 5, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28698730/neurobrucellosis-presenting-with-unilateral-abducens-nerve-palsy
#8
Mohsen Andisheh, Susan Amirsalari, Mohammad Torkaman, Marzieh Sabzechian, Shahla Afsharpaiman
One of the rare complications of brucellosis is neurobrucellosis. There have been numerous reports showing clinical forms of brucellosis affecting CNS, such as cranial nerve involvement, myelitis, vascular disease, radiculoneuritis, meningitis, meningoencephalitis, and demyelinating disease. In this case report, we introduce a 2.5 yr old girl with unilateral abducens nerve palsy referred to Baghiyatallah Hospital Outpatient Clinic, Tehran, Iran in June 2015.
2017: Iranian Journal of Child Neurology
https://www.readbyqxmd.com/read/28685728/effects-of-intraorbital-electroacupuncture-on-diabetic-abducens-nerve-palsy
#9
Ling-Yun Zhou, Tie-Juan Liu, Xue-Mei Li, Chang Su, Jin Zhou
No abstract text is available yet for this article.
July 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28673673/bilateral-traumatic-abducens-nerve-avulsion-a-case-series-and-literature-review
#10
REVIEW
Krishnan Ravindran, Bruno Lorensini, Frank Gaillard, Sarah Kalus
Although abducens nerve palsy is an established sequela of head trauma - given the prolonged intracranial course of the nerve - bilateral injury is rare. Here, we present two cases of bilateral traumatic abducens nerve avulsion, in the absence of regional fractures, one of which presented two months following the initial trauma. Additionally, we review the current literature on bilateral abducens nerve palsy secondary to trauma, discussing the anatomy of the nerve's course and potential mechanisms of injury...
June 30, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28664026/transarterial-sinus-embolization-for-a-dural-arteriovenous-fistula-in-a-sinus-of-the-lesser-sphenoid-wing-a-case-report
#11
Tomoaki Murakami, Hajime Nakamura, Takeo Nishida, Tomohiko Ozaki, Katsunori Asai, Tomoki Kidani, Yoshinori Kadono, Toshiki Yoshimine
Dural arteriovenous fistula (DAVF) in a sinus of the lesser sphenoid wing (SLSW) is rarely reported. Here, we report a case of an isolated SLSW DAVF treated by coils placed into the sinus through the feeding artery. A 68-year-old man was admitted to our hospital with headache. Magnetic resonance images and an angiogram showed a varix in the right middle cranial fossa. A DAVF, consisting of three main feeders and the isolated SLSW, was diagnosed based on the angiogram findings. Retrograde leptomeningeal venous drainage to the deep middle cerebral vein was observed...
April 2017: NMC Case Rep J
https://www.readbyqxmd.com/read/28664009/orbital-abducens-nerve-schwannoma-a-case-report-and-review-of-the-literature
#12
Yu Iida, Katsumi Sakata, Natsuki Kobayashi, Junya Tatezuki, Hiroshi Manaka, Takashi Kawasaki
Intraorbital schwannoma is a rare tumor which accounts for about 1-2% of all neoplasms of the orbit. Orbital schwannomas most commonly arise from the sensory branches of the trigeminal nerve. On the other hand, intraorbital abducens nerve schwannomas are extremely rare, with a search of the English literature identifying only four cases of intraorbital abducens nerve schwannoma. This is the 5th reported case of an orbital schwannoma arising from the terminal branch of the abducens nerve to the lateral rectus muscle...
October 2016: NMC Case Rep J
https://www.readbyqxmd.com/read/28619497/long-term-functional-outcome-of-symptomatic-unruptured-intracranial-aneurysms-in-an-interdisciplinary-treatment-concept
#13
M Kunz, F Dorn, T Greve, V Stoecklein, J C Tonn, H Brückmann, Ch Schichor
OBJECTIVE: In symptomatic unruptured intracranial aneurysms (UIA), data on long-term functional outcome are sparse in the literature, even in the light of modern interdisciplinary treatment decisions. We therefore analysed our in-house database for prognostic factors and long-term outcome of neurological symptoms after microsurgical/endovascular treatment. METHODS: Patients treated between 2000 and 2016 after interdisciplinary vascular board decision were included...
June 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28616041/efficacy-of-intraorbital-electroacupuncture-for-diabetic-abducens-nerve-palsy-study-protocol-for-a-prospective-single-center-randomized-controlled-trial
#14
Ling-Yun Zhou, Xue-Mei Li, Tie-Juan Liu, Xiao-Jie Ji, Ming Zhao, Chang Su, Ji-Chao Liu, Jiang-Yun Sun
Abducens nerve palsy (ANP) is commonly seen in patients with diabetes mellitus. The validity of acupuncture as a traditional Chinese medicine method in peripheral nerve repair is well established. However, its efficacy in randomized controlled trials remains unclear. Herein, we designed a protocol for a prospective, single-center, randomized controlled trial to investigate the effect of intraorbital electroacupuncture on diabetic ANP. We plan to recruit 60 patients with diabetic ANP, and randomly divide them into treatment and control groups...
May 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28602444/abducens-nerve-palsy-in-gestational-hypertension-a-case-report-and-review-of%C3%A2-the%C3%A2-literature
#15
Albaro J Nieto-Calvache, Sara Loaiza-Osorio, José Casallas-Carrillo, María F Escobar-Vidarte
BACKGROUND: Headache, blurring of vision, and confusion are common neurologic symptoms of hypertensive disorders of pregnancy, whereas abducens nerve palsy during pregnancy is an extremely rare condition. CASE: A 28-year-old woman with gestational hypertension presented isolated sixth cranial nerve palsy after delivery. Neither simple resonance nor angioresonance showed alterations. No other specific pathology was found. Symptoms of abducens nerve palsy resolved spontaneously...
June 8, 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28601537/trigeminocardiac-reflex-as-the-presentation-of-maxillary-sinus-adenocarcinoma
#16
Jason M Lunt, Ahmad Al-Taee, Rachna Rawal, Fred R Buckhold
The trigeminocardiac reflex is a brainstem reflex that manifests as sudden hemodynamic dysfunction including bradycardia, hypotension, hypopnea, and gastric hypermotility due to mechanical stimulation of the trigeminal nerve. Here, the trigeminocardiac reflex was part of the initial patient presentation that led to the diagnosis of maxillary adenocarcinoma. A 54-year-old male presented to the emergency department with a two-month history of right upper jaw pain. Vital signs included blood pressure of 68/48 mmHg, heart rate of 55, and oxygen saturation of 85%...
June 7, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28586933/a-case-of-pituitary-carcinoma-initially-diagnosed-as-an-ectopic-growth-hormone-producing-pituitary-adenoma-with-a-high-ki-67-labeling-index
#17
Toshiki Endo, Yoshikazu Ogawa, Mika Watanabe, Teiji Tominaga
We report a case of a 66-year-old woman with a malignant transformation of a growth hormone (GH)-producing pituitary adenoma that was mainly located in the clivus. The patient originally presented with left oculomotor and abducens nerve palsies. Magnetic resonance imaging revealed a clival tumor separated from the normal pituitary gland, and the patient subsequently underwent transsphenoidal surgery. Analysis of the resected clival tissue revealed proliferation of tumor cells with slightly irregular nuclei but no mitosis...
June 6, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28580154/parry-romberg-syndrome-presenting-with-a-giant-intracranial-aneurysm-a-case-report
#18
Ilse H de Lange, Anna Mt van Oploo, Feico Jj Halbertsma, F George Roos, Levinus A Bok
A giant intracranial aneurysm was diagnosed in a 10-year-old girl when she developed a right abducens nerve palsy. The aneurysm was treated successfully. Six years later, however, she presented with a progressive en coup de sabre deformity, leading to the diagnosis Parry Romberg Syndrome (PRS), a rare diagnosis characterized by hemifacial atrophy of skin, subcutaneous tissue, skeletal muscle and bones and often associated with various non-specific intracerebral abnormalities. In this patient retrospective analysis of computed tomography and magnetic resonance imaging imaging indeed revealed intracerebral calcifications and aspecific white matter lesions...
May 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28553221/tumors-presenting-as-multiple-cranial-nerve-palsies
#19
Kishore Kumar, Rafeeq Ahmed, Bharat Bajantri, Amandeep Singh, Hafsa Abbas, Eddy Dejesus, Rana Raheel Khan, Masooma Niazi, Sridhar Chilimuri
Cranial nerve palsy could be one of the presenting features of underlying benign or malignant tumors of the head and neck. The tumor can involve the cranial nerves by local compression, direct infiltration or by paraneoplastic process. Cranial nerve involvement depends on the anatomical course of the cranial nerve and the site of the tumor. Patients may present with single or multiple cranial nerve palsies. Multiple cranial nerve involvement could be sequential or discrete, unilateral or bilateral, painless or painful...
January 2017: Case Reports in Neurology
https://www.readbyqxmd.com/read/28526001/postoperative-full-abduction-in-a-patient-of-duane-retraction-syndrome-without-an-abducens-nerve-a-case-report
#20
Jae Hyoung Kim, Jeong-Min Hwang
BACKGROUND: Duane retraction syndrome (DRS) consists of abduction deficit, globe retraction and upshoots or downshoots with adduction. The abducens nerve on the affected side is absent in type 1 DRS. After bilateral medial rectus muscle recession in unilateral type 1 DRS may improve the abduction limitation, but still more than -3 limitation remains. CASE PRESENTATION: A 6-month-old boy presented with esotropia which had been noticed in early infancy. He showed limited abduction, fissure narrowing on attempted adduction and a small upshoot OS...
May 19, 2017: BMC Ophthalmology
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