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https://www.readbyqxmd.com/read/28922886/intracranial-bypass-of-posterior-inferior-cerebellar-artery-aneurysms-indications-technical-aspects-and-clinical-outcomes
#1
David J Bonda, Mohamad Labib, Jeffrey M Katz, Rafael A Ortiz, David Chalif, Avi Setton, David J Langer, Amir R Dehdashti
BACKGROUND: For some posterior inferior cerebellar artery (PICA) aneurysms, there is no constructive endovascular or direct surgical clipping option. Intracranial bypass is an alternative to a deconstructive technique. OBJECTIVE: To evaluate the clinical features, surgical techniques, and outcome of PICA aneurysms treated with bypass and obliteration of the diseased segment. METHODS: Retrospective review of PICA aneurysms treated via intracranial bypass was performed...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28904465/spectrum-of-visual-impairment-in-cerebral-venous-thrombosis-importance-of-tailoring-therapies-based-on-pathophysiology
#2
Sanjith Aaron, Anupriya Arthur, A T Prabakhar, Pavitra Mannam, N K Shyamkumar, Sunithi Mani, Vivek Mathew, Jeyanthi Peter, Ajith Sivadasan, Anika Alexander, M Karthik, Rohith Ninan Benjamin, Mathew Alexander
Visual impairment can complicate cerebral venous thrombosis (CVT). Here, we describe the various pathophysiological mechanisms and treatments available. A retrospective chart review of all patients treated for CVT in a large quaternary teaching hospital was done, and cases with visual impairment due to CVT were identified. The various mechanisms causing visual impairment in CVT were (1) raised intracranial pressure (ICP) caused by venous thrombosis without venous infarcts resulting in a benign intracranial hypertension-like presentation of CVT, (2) venous infarcts involving the occipital cortex, (3) raised ICP following the development of a secondary dural arteriovenous (AV) fistula, and (4) arterial occipital infarcts due to posterior cerebral artery compression secondary to herniation in large venous infarcts...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28901169/predictors-of-response-to-occipital-nerve-stimulation-in-refractory-chronic-headache
#3
Sarah Miller, Laurence Watkins, Manjit Matharu
Background Occipital nerve stimulation is a promising treatment for refractory chronic headache disorders, but is invasive and costly. Identifying predictors of response would be useful in selecting patients. We present the results of an open-label prospective cohort study of 100 patients (35 chronic migraine, 33 chronic cluster headache, 20 short-lasting unilateral neuralgiform headache attacks and 12 hemicrania continua) undergoing occipital nerve stimulation, using a multivariate binary regression analysis to identify predictors of response...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28885117/the-interperiosteodural-concept-applied-to-the-jugular-foramen-and-its-compartmentalization
#4
Florian Bernard, Ilyess Zemmoura, Jean Philippe Cottier, Henri-Dominique Fournier, Louis-Marie Terrier, Stéphane Velut
OBJECTIVE The dura mater is made of 2 layers: the endosteal layer (outer layer), which is firmly attached to the bone, and the meningeal layer (inner layer), which directly covers the brain and spinal cord. These 2 dural layers join together in most parts of the skull base and cranial convexity, and separate into the orbital and perisellar compartments or into the spinal epidural space to form the extradural neural axis compartment (EDNAC). The EDNAC contains fat and/or venous blood. The aim of this dissection study was to anatomically verify the concept of the EDNAC by focusing on the dural layers surrounding the jugular foramen area...
September 8, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28882864/mr-neurography-of-greater-occipital-nerve-neuropathy-initial-experience-in-patients-with-migraine
#5
L Hwang, R Dessouky, Y Xi, B Amirlak, A Chhabra
BACKGROUND AND PURPOSE: MR imaging of peripheral nerves (MR neurography) allows improved assessment of nerve anatomy and pathology. The objective of this study was to evaluate patients with unilateral occipital neuralgia using MR neurography and to assess the differences in greater occipital nerve signal and size between the symptomatic and asymptomatic sides. MATERIALS AND METHODS: In this case-control evaluation using MR neurography, bilateral greater occipital nerve caliber, signal intensity, signal-to-noise ratios, and contrast-to-noise ratios were determined by 2 observers...
September 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28877142/adding-prefrontal-transcranial-direct-current-stimulation-before-occipital-nerve-stimulation-in-fibromyalgia
#6
Hye Bin Yoo, Jan Ost, Wim Joos, Tony Van Havenbergh, Dirk De Ridder, Sven Vanneste
OBJECTIVES: Fibromyalgia is a type of chronic musculoskeletal pain without a clear peripheral origin of nociception, often associated with depression. The underlying pathophysiology involves changes in a functional network that is related to pain and emotional processing in the central nervous system. Transcranial direct current stimulation (tDCS) targeting the dorsolateral prefrontal cortex or the occipital nerve (ON) are non-invasive neuromodulation techniques capable of improving fibromyalgia symptoms...
September 1, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28875347/the-relationship-between-contrast-sensitivity-and-retinal-nerve-fiber-layer-thickness-in-patients-with-glaucoma
#7
Sarah Amanullah, Joseph Okudolo, Kamran Rahmatnejad, Shuai-Chun Lin, Sheryl S Wizov, Remy S Manzi Muhire, Lisa A Hark, Cindy X Zheng, Tingting Zhan, George L Spaeth
PURPOSE: To evaluate the correlation between contrast sensitivity (CS) and retinal nerve fiber layer (RNFL) in different areas of vision. METHODS: This report is a sub-analysis of a prospective, observational cohort study investigating changes in performance-based assessment, vision-related quality of life, and clinical measures in patients with moderate to advanced glaucoma. The study included 161 participants with at least a 2-year history of glaucoma who underwent annual testing for 4 years...
September 5, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28875113/fully-endoscopic-minimally-invasive-transrectus-capitis-posterior-muscle-triangle-approach-to-the-posterolateral-condyle-and-jugular-tubercle
#8
Wang Mingdong, Juan C Fernandez-Miranda, Roger Neves Mathias, Eric Wang, Paul Gardner, Hong Wang
Background  We evaluated a transrectus capitis posterior muscle triangle approach to the posterolateral foramen magnum, occipital condyles, jugular tubercle, and the fourth ventricle. We also assessed factors that affect the amount of bone removal required. Objective  To evaluate if the proposed approach is as effective as standard open approaches to expose the lateral portion of the foramen magnum. Methods  The proposed minimally invasive fully endoscopic approach was performed in 15 cadaveric specimens using 4-mm (0- and 45-degree) endoscopes...
October 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28844531/influence-of-greater-occipital-nerve-block-on-pain-severity-in-migraine-patients-a-systematic-review-and-meta-analysis
#9
REVIEW
Yongguo Tang, Junfang Kang, Yu Zhang, Xuejun Zhang
AIMS: Greater occipital nerve (GON) block may be a promising approach to treat migraine. However, the results remained controversial. We conducted a systematic review and meta-analysis to explore the efficacy of GON block in migraine patients. METHODS: PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases were systematically searched. Randomized controlled trials (RCTs) assessing the efficacy of GON block versus placebo in migraine patients were included...
August 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28808597/visual-evoked-potentials-in-primary-open-angle-glaucoma
#10
Mukesh Kumar Jha, Dilip Thakur, Nirmala Limbu, Badri Prasad Badhu, Bishnu Hari Paudel
BACKGROUND AND AIMS: Visual evoked potentials (VEPs) assess the integrity of the visual pathways from the optic nerve to the occipital cortex. Optic disc cupping and visual field loss have been associated with prolongation of latency of VEP in primary open angle glaucoma (POAG). METHODS: Pattern reversal and flash VEP tests were done in consenting 20 primary open angle glaucoma eyes and 40 normal control eyes. RESULTS: In POAG cases, the refractive error [3...
2017: Journal of Neurodegenerative Diseases
https://www.readbyqxmd.com/read/28802798/most-common-sites-on-mri-of-intracranial-neoplastic-leptomeningeal-disease
#11
J Matthew Debnam, Rory R Mayer, T Linda Chi, Leena Ketonen, Jeffrey S Weinberg, Wei Wei, Morris D Groves, Nandita Guha-Thakurta
Neoplastic leptomeningeal disease (LMD) represents infiltration of the leptomeninges by tumor cells. Knowledge of the frequencies of locations of LMD on MRI may assist in early detection, help elucidate the process of leptomeningeal spread of cancer and understand how LMD affects the central nervous system. Our goal was to identify intracranial sites of neoplastic LMD predilection on MRI in patients with cytologically-proven LMD. The presence of FLAIR signal hyperintensity and T1-weighted post-contrast enhancement in the sulci of the supratentorial compartment and cerebellum and enhancement of the cranial nerves (CNs), basal cisterns, pituitary stalk, and ependymal surface of the lateral ventricles, as well as the presence of parenchymal metastasis were recorded...
August 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28763879/-study-of-fraction-amplitude-of-low-frequency-fluctuation-on-resting-state-functional-magnetic-resonance-imaging-in-adultperipheral-facial-paralysis
#12
Y J Zhu, G L Ma, T B Song, L Du, R C Guo, S L Sun, H Li, L G Sun
Objective: To analysis the change of brain functional activity in the left and right peripheral facial paralysis by using resting-state functional magnetic resonance imaging (R-fMRI) of fraction amplitude of low frequency fluctuation(fALFF) measurement technique, and research the abnormal brain region with different side patients whether there are differences. Methods: A total of 43 patients with peripheral facial paralysis patients (patient groups, divided into left / right two subgroups) and 21 healthy volunteers (control group) in this study...
July 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28739475/posterior-osteosynthesis-with-monoaxial-lateral-mass-screw-rod-system-for-unstable-c1-burst-fractures
#13
Yin-Shun Zhang, Jian-Xiang Zhang, Qing-Guo Yang, Wei Li, Hui Tao, Cai-Liang Shen
BACKGROUND CONTEXT: Surgical treatment for unstable atlas fractures has evolved in recent decades from C1-C2 or C0-C2 fusion to motion-preservation techniques of open reduction and internal fixation (ORIF). However, regardless of transoral or posterior approach, the reduction is still not satisfactory. PURPOSE: The article describes and evaluates a new technique for treating the unstable atlas fractures by using a monoaxial screw-rod system. STUDY DESIGN: This is a retrospective study PATIENT SAMPLE: The sample includes adult patients with unstable C1 fractures treated with a posterior monoaxial screw-rod system...
July 21, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28728320/temple-and-postauricular-dissection-in-face-and-neck-lift-surgery
#14
Joo Heon Lee, Tae Suk Oh, Sung Wan Park, Jae Hoon Kim, Tanvaa Tansatit
Periauricular paresthesia may afflict patients for a significant amount of time after facelift surgery. When performing face and neck lift surgery, temple and posterior auricular flap dissection is undertaken directly over the auriculotemporal, great auricular, and lesser occipital nerve territory, leading to potential damage to the nerve. The auriculotemporal nerve remains under the thin outer superficial fascia just below the subfollicular level in the prehelical area. To prevent damage to the auriculotemporal nerve and to protect the temporal hair follicle, the dissection plane should be kept just above the thin fascia covering the auriculotemporal nerve...
July 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28708647/pneumocephalus-induced-oculomotor-nerve-palsy-after-atlanto-occipital-decompression-with-dural-plasty
#15
Yunfeng Han, Jianjun Sun, Zhenyu Wang
BACKGROUND: Pneumocephalus after posterior fossa craniotomy is very common. However, cranial nerve dysfunction secondary to pneumocephalus is a very rare phenomenon. PATIENT PRESENTATION: This case reports a patient who suffers from Chiari I malformation with syringomyelia in cervical spinal cord and develops unilateral oculomotor nerve palsy after atlanto-occipital decompression with dural plasty. CONCLUSIONS: Cranial nerve dysfunction caused by pneumocephalus after craniotomy is rare and easily misdiagnosed...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28708008/long-term-follow-up-of-intractable-chronic-short-lasting-unilateral-neuralgiform-headache-disorders-treated-with-occipital-nerve-stimulation
#16
Sarah Miller, Laurence Watkins, Manjit Matharu
Background Occipital nerve stimulation is a potential treatment option for medically intractable short-lasting unilateral neuralgiform headache attacks. We present long-term outcomes in 31 patients with short-lasting unilateral neuralgiform headache attacks treated with occipital nerve stimulation in an uncontrolled open-label prospective study. Methods Thirty-one patients with intractable short-lasting unilateral neuralgiform headache attacks were treated with bilateral occipital nerve stimulation from 2007 to 2015...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28702799/greater-occipital-nerve-infiltration-under-mr-guidance-feasibility-study-and-preliminary-results
#17
Adrian Kastler, Romain Perolat, Bruno Kastler, Caroline Maindet-Dominici, Jan Fritz, Alim Louis Benabid, Stephan Chabardes, Alexandre Krainik
OBJECTIVE: To assess the feasibility of greater occipital nerve (GON) intermediate site infiltration with MRI guidance. METHODS: Eleven consecutive patients suffering from chronic refractory cranio-facial pain who underwent 16 GON infiltrations were included in this prospective study. All of the procedures were performed on an outpatient basis in the research facility of our institution, with a 1.5 T scanner. The fatty space between inferior obliquus and semispinalis muscles at C1-C2 level was defined as the target...
July 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28700369/pulsed-radiofrequency-in-chronic-pain
#18
Thibaut Vanneste, Astrid Van Lantschoot, Koen Van Boxem, Jan Van Zundert
PURPOSE OF REVIEW: The increasing number of publications on pulsed radiofrequency (PRF) treatment of chronic pain reflects the interest for this technique. We summarize the literature for PRF in five indications: radicular pain, trigeminal neuralgia (TN), occipital neuralgia, shoulder and knee pain. RECENT FINDINGS: The efficacy and safety of PRF adjacent to the dorsal root ganglion was documented on cervical and on lumbar level.PRF has been used for the treatment of TN...
October 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28694600/long-term-resolution-of-delayed-onset-hypoglossal-nerve-palsy-following-occipital-condyle-fracture-case-report-and-review-of-the-literature
#19
Sudhakar Vadivelu, Zihan Masood, Bryan Krueger, Rudy Marciano, David Chen, Cliff Houseman, Salvatore Insinga
The authors present the case of a patient that demonstrates resolution of delayed onset hypoglossal nerve palsy (HNP) subsequent to occipital condyle fracture following a motor vehicle accident. Decompression of the hypoglossal nerve and craniocervical fixation led to satisfactory long-term (>5 years) outcome. There is a scarcity of literature in recognizing HNPs following trauma and a lack of pathophysiological understanding to both a delayed presentation and to resolution versus persistence. This is the first report demonstrating long-term resolution of hypoglossal nerve injury following trauma to the craniocervical junction...
April 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28691984/stepwise-rostrocaudal-brainstem-anesthesia-as-a-complication-of-local-anesthesia-a-case-report
#20
Braden Waters, Ryan R Kroll, John Muscedere, Lysa Boissé Lomax, Jessica E Burjorjee
Iatrogenic cranial nerve palsies can rarely complicate neurosurgical, oral maxillofacial, and otolaryngological procedures. Among the most serious complications of cranial nerve palsy is upper airway obstruction, which is life threatening. We present a case of multiple cranial nerve palsies evolving rapidly in a rostrocaudal stepwise fashion after infiltration of lidocaine to repair a cerebrospinal fluid leak in a patient postoccipital craniectomy. This led to hypoxic respiratory failure requiring mechanical ventilation before resolving spontaneously...
July 6, 2017: A & A Case Reports
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