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Trigeminal nerve

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https://www.readbyqxmd.com/read/28437509/thermal-perception-as-a-key-factor-for-assessing-effects-of-trigeminal-nerve-injury
#1
Hye-Kyoung Kim, Ki-Suk Kim, Mee-Eun Kim
AIMS: To conduct a functional examination using multimodal exploration of a sample of patients with iatrogenic trigeminal nerve injury to understand the underlying mechanisms of neuropathic pain following trigeminal nerve injury. METHODS: Subjective and objective symptoms and responses to thermal and electrical quantitative sensory testing (QST) were evaluated in 85 patients with unilateral trigeminal nerve injury. Objective symptoms were measured by seven clinical sensory tests...
April 2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/28434965/trochlear-schwannoma-presenting-with-isolated-trigeminal-neuralgia
#2
Cody L Nesvick, Avital Perry, Christopher S Graffeo, Aditya Raghunathan, Julie E Hammack, Jamie J Van Gompel
BACKGROUND: Schwannomas arising from the cranial nerves controlling extraocular eye movements are very rare and usually present with some degree of diplopia. CASE DESCRIPTION: We report a 50-year-old woman who presented with isolated left-sided trigeminal neuralgia of six months' duration. Imaging demonstrated a homogeneously enhancing mass in the left ambient cistern, and the patient was taken to the operating room for resection. A retrosigmoid approach was used, and the mass was directly visualized arising from the trochlear nerve and compressing on the dorsal root entry zone of the trigeminal nerve...
April 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28426550/neuropathic-pain-after-chronic-nerve-constriction-may-not-correlate-with-chloride-dysregulation-in-mouse-trigeminal-nucleus-caudalis-neurons
#3
Alberto Castro, Ying Li, Charles Raver, Ramesh Chandra, Radi Masri, Mary Kay Lobo, Asaf Keller
Changes in chloride reversal potential in rat spinal cord neurons have previously been associated with persistent pain in nerve injury and inflammation models. These changes correlate with a decrease in the expression of the potassium% chloride transporter, KCC2, and with increases in neuronal excitability. Here, we test the hypothesis that similar changes occur in mice with neuropathic pain induced by chronic constriction injury of the trigeminal infraorbital nerve (CCI¬-ION). This model allows us to distinguish an acute pain phase (3-¬5 days after injury) from a persistent pain phase (12¬-14 days after CCI-¬ION)...
April 18, 2017: Pain
https://www.readbyqxmd.com/read/28425266/nitroglycerin-challenge-induces-lateralized-headache-in-nasociliarynerve-ligated-rats-implications-for-chronic-migraine
#4
Didem Akçali, Ahmet Deniz Belen, Avni Babacan, Hayrunnisa Bolay
BACKGROUND/AIM: Chronic migraine is a common debilitating disease with limited treatment options. We aimed to develop a novel model for chronic migraine by ligating the nasociliary nerve (NCL) and administering nitroglycerin (NTG) to exacerbate acute headache attacks. MATERIALS AND METHODS: Exacerbation of the headache was induced by NTG (10 mg/kg, subcutaneously) administered to male Wistar rats (n = 36) 14 days following unilateral NCL. Cutaneous and cold allodynia was tested using Von Frey (VF) filaments and acetone, respectively...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28424990/proteomic-analysis-of-the-hippocampus-in-mouse-models-of-trigeminal-neuralgia-and-inescapable-shock-induced-depression
#5
Qing-Huan Guo, Qing-He Tong, Ning Lu, Hong Cao, Liu Yang, Yu-Qiu Zhang
To investigate the behavioral and biomolecular similarity between neuralgia and depression, a trigeminal neuralgia (TN) mouse model was established by constriction of the infraorbital nerve (CION) to mimic clinical trigeminal neuropathic pain. A mouse learned helplessness (LH) model was developed to investigate inescapable foot-shock-induced psychiatric disorders like depression in humans. Mass spectrometry was used to assess changes in the biomolecules and signaling pathways in the hippocampus from TN or LH mice...
April 19, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28421829/hydrocephalus-and-trigeminal-neuralgia-exploring-the-association-and-management-options
#6
Yuuki Charlie Barke Na, Shyam Vijay Pujara, Ahmad Abdelhai Moussa, Amy Charlotte Gerrish, Surajit Basu
We report the successful surgical management of three patients with trigeminal neuralgia and hydrocephalus. MRI revealed no neurovascular contact at the trigeminal root entry zone. Trigeminal neuralgic symptoms were controlled following alleviation of hydrocephalus. We hypothesize that trigeminal nerve traction, secondary to hydrocephalus, as the cause for their trigeminal neuralgia.
April 19, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28409393/stereotactic-radiosurgery-vs-fractionated-radiotherapy-for-tumor-control-in-vestibular-schwannoma-patients-a-systematic-review
#7
REVIEW
Oscar Persson, Jiri Bartek, Netanel Ben Shalom, Theresa Wangerid, Asgeir Store Jakola, Petter Förander
OBJECTIVE: Repeated controlled studies have revealed that stereotactic radiosurgery is better than microsurgery for patients with vestibular schwannoma (VS) <3 cm in need of intervention. In this systematic review we aimed to compare results from single-fraction stereotactic radiosurgery (SRS) to fractionated stereotactic radiotherapy (FSRT) for patients with VS. DATA SOURCES AND ELIGIBILITY CRITERIA: We systematically searched MEDLINE, Web of Science, Embase and Cochrane and screened relevant articles for references...
April 13, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28403646/neuropathic-orofacial-pain-facts-and-fiction
#8
Lene Baad-Hansen, Rafael Benoliel
Definition and taxonomy This review deals with neuropathic pain of traumatic origin affecting the trigeminal nerve, i.e. painful post-traumatic trigeminal neuropathy (PTTN). Symptomatology The clinical characteristics of PTTN vary considerably, partly due to the type and extent of injury. Symptoms involve combinations of spontaneous and evoked pain and of positive and negative somatosensory signs. These patients are at risk of going through unnecessary dental/surgical procedures in the attempt to eradicate the cause of the pain, due to the fact that most dentists only rarely encounter PTTN...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28403323/a-critical-review-of-trials-of-transcranial-direct-current-stimulation-and-trigeminal-nerve-stimulation-for-depression-the-issue-of-treatment-emergent-mania
#9
REVIEW
Pedro Shiozawa, Quirino Cordeiro, Hyong Jin Cho, Alisson Paulino Trevizol, Elisa Brietzke
Objective: This study is a critical review analyzing occurrence of treatment-emergent mania (TEM) related to transcranial direct current stimulation (tDCS) and trigeminal nerve stimulation (TNS). Method: We present a systematic review of the literature on TEM related to tDCS and TNS treatment for major depressive disorder (MDD), conducted in accordance with the recommendations from Cochrane Group and the PRISMA guidelines. Results: Our search identified few reported episodes of TEM in the literature...
January 2017: Trends in Psychiatry and Psychotherapy
https://www.readbyqxmd.com/read/28401031/sella-turcica-measurements-on-lateral-cephalograms-of-patients-with-neurofibromatosis-type-1
#10
Reinhard E Friedrich, Johanna Baumann, Anna Suling, Hannah T Scheuer, Hanna A Scheuer
The aim of this study was to measure line segments and areas of sella turcica on lateral cephalograms with respect to the clinical diagnosis of facial phenotype of patients with neurofibromatosis type 1 (NF1). Special attention was given to correlate the measured values with certain tumour types that are typical for this disease. Material and methods: Lateral cephalograms of 194 individuals were investigated. Patients with NF1 were further divided according to the detection and topography of facial plexiform neurofibromas (PNF) taking into account the distribution pattern of the trigeminal nerve...
2017: GMS Interdisciplinary Plastic and Reconstructive Surgery DGPW
https://www.readbyqxmd.com/read/28399652/facial-presentations-of-primary-headache-disorders
#11
Yair Sharav, Zaza Katsarava, Andrew Charles
Background Many patients with mid-face or lower face craniofacial pain are diagnosed, based on accompanying signs and symptoms and features other than location, as either atypical migraines or atypical TACs. Distinguishing features of headache disorders as a cause of facial pain include the temporal pattern of pain, associated symptoms including light and sound sensitivity and nausea, cranial autonomic symptoms, and the lack of local triggering among others. Results An intraoral neurovascular pain has been observed, and was termed neurovascular orofacial pain (NVOP)...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28397136/an-experimental-animal-model-for-percutaneous-procedures-used-in-trigeminal-neuralgia
#12
Johannes Herta, Wei-Te Wang, Romana Höftberger, Sabine Breit, Sibylle Kneissl, Helga Bergmeister, Heber Ferraz-Leite
OBJECT: This study describes an experimental rabbit model that allows the reproduction of percutaneous operations that are used in patients with trigeminal neuralgia (TN). Attention was given to an exact anatomical description of the rabbit's middle cranial fossa as well as the establishment of conditions for a successful procedure. METHODS: Morphometric measurements were taken from 20 rabbit skulls and CT scans. The anatomy of the trigeminal nerve, as well as its surrounding structures, was assessed by bilateral dissection of 13 New Zealand white rabbits (NWR)...
April 10, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28396882/afferent-fiber-remodeling-in-the-somatosensory-thalamus-of-mice-as-a-neural-basis-of-somatotopic-reorganization-in-the-brain-and-ectopic-mechanical-hypersensitivity-after-peripheral-sensory-nerve-injury
#13
Yuichi Takeuchi, Hironobu Osaki, Yuki Yagasaki, Yoko Katayama, Mariko Miyata
Plastic changes in the CNS in response to peripheral sensory nerve injury are a series of complex processes, ranging from local circuit remodeling to somatotopic reorganization. However, the link between circuit remodeling and somatotopic reorganization remains unclear. We have previously reported that transection of the primary whisker sensory nerve causes the abnormal rewiring of lemniscal fibers (sensory afferents) on a neuron in the mouse whisker sensory thalamus (V2 VPM). In the present study, using transgenic mice whose lemniscal fibers originate from the whisker sensory principle trigeminal nucleus (PrV2) are specifically labeled, we identified that the transection induced retraction of PrV2-originating lemniscal fibers and invasion of those not originating from PrV2 in the V2 VPM...
March 2017: ENeuro
https://www.readbyqxmd.com/read/28394552/multiple-intracranial-schwannomas-case-report
#14
Mario Mihalj, Krešimir Dolić, Pavao Jurinović, Nikolina Ivica Miše, Marina Titlić, Irena Pintarić
Schwannomas are benign encapsulated tumors arising from the sheaths of peripheral nerves. They present as slowly enlarging solitary lumps, which may cause neurological defects. Multiple schwannomas in non-neurofi bromatosis type 2 patients are extremely rare. We report a case of a 60-year-old female patient, without any family history of neurofibromatosis or schwannomatosis, presented with trigeminal neuralgia and progressive facial nerve palsy. Magnetic resonance imaging revealed the presence of acoustic schwannoma involving facial nerve and trigeminal schwannoma of the cisternal part of the nerve involving gasserian ganglion (Meckel’s cave)...
June 2016: Acta Clinica Croatica
https://www.readbyqxmd.com/read/28392449/clinical-analysis-and-surgical-treatment-of-trigeminal-neuralgia-caused-by-vertebrobasilar-dolichoectasia-a-retrospective-study
#15
Shoujia Sun, Wei Jiang, Junwen Wang, Pan Gao, Xiaojing Zhang, Liwu Jiao, Weihua Liu, Kai Shu, Ting Lei
BACKGROUND: Trigeminal neuralgia (TN) caused by vertebrobasilar dolichoectasia (VBD) is rare and needs further exploration. The purpose of this study is to investigate the clinical features and surgical treatment of TN caused by VBD. METHODS: 15 patients with TN caused by VBD were included in our study. The patient data regarding clinical characteristics, neuroimaging presentations, intraoperative findings and treatment outcomes were analyzed retrospectively. Moreover, the previous relevant literature was reviewed simultaneously...
April 6, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28382578/orofacial-proprioceptive-thalamus-of-the-rat
#16
Atsushi Yoshida, Takashi Fujio, Fumihiko Sato, Md Sams Sazzad Ali, Tahsinul Haque, Haruka Ohara, Masayuki Moritani, Takafumi Kato, Jonathan O Dostrovsky, Yoshihisa Tachibana
The ascending pathway mediating proprioception from the orofacial region is still not fully known. The present study elucidated the relay of jaw-closing muscle spindle (JCMS) inputs from brainstem to thalamus in rats. We injected an anterograde tracer into the electrophysiologically identified supratrigeminal nucleus (Su5), known to receive JCMS input. Many thalamic axon terminals were labeled and were found mainly contralaterally in a small, unpredicted area of the caudo-ventromedial edge (VPMcvm) of ventral posteromedial thalamic nucleus (VPM)...
April 5, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28377255/safety-of-superior-petrosal-vein-sacrifice-during-microvascular-decompression-of-the-trigeminal-nerve
#17
Omar N Pathmanaban, Frazer O'Brien, Yahia Z Al-Tamimi, Charlotte L Hamerbeck-Ward, Scott A Rutherford, Andrew T King
BACKGROUND: Microvascular decompression (MVD) is a safe and effective treatment for trigeminal neuralgia (TGN). Cerebellar venous infarction is a complication associated with surgical sacrifice of the superior petrosal vein (SPV). The SPV intervenes between the trigeminal nerve and the surgeon. Optimal exposure of the cisternal trigeminal nerve, particularly at the brain stem, can be achieved by sacrificing the SPV. We analysed a cohort of 224 patients to determine the frequency of cerebellar venous infarction...
April 1, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28365788/the-magnetic-map-sense-and-its-use-in-fine-tuning-the-migration-programme-of-birds
#18
REVIEW
D Heyers, D Elbers, M Bulte, F Bairlein, H Mouritsen
The Earth's magnetic field is one of several natural cues, which migratory birds can use to derive directional ("compass") information for orientation on their biannual migratory journeys. Moreover, magnetic field effects on prominent aspects of the migratory programme of birds, such as migratory restlessness behaviour, fuel deposition and directional orientation, implicate that geomagnetic information can also be used to derive positional ("map") information. While the magnetic "compass" in migratory birds is likely to be based on radical pair-forming molecules embedded in their visual system, the sensory correlates underlying a magnetic "map" sense currently remain elusive...
April 1, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28365079/a-lateral-cephalometry-study-of-patients-with-neurofibromatosis-type-1
#19
Reinhard E Friedrich, Jan-Marten Lehmann, Jonathan Rother, Georg Christ, Christine Zu Eulenburg, Hannah T Scheuer, Hanna A Scheuer
PURPOSE: Neurofibromatosis type 1 (NF1) is an autosomal dominant transmitted tumour suppressor syndrome and also a bone disease. Osseous dysplasia affecting the craniofacial region is characteristic of NF1. The aim of this study was to analyse the lateral cephalograms of NF1 patients in comparison to individuals who were not affected by this condition in order to describe the skeletal phenotype of NF1 in more detail. MATERIALS AND METHODS: The study comprises the lateral cephalograms of 172 patients with established NF1 diagnoses (female = 85, male = 87)...
February 20, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28364580/end-organ-radiographic-manifestations-of-cranial-neuropathies-a-concise-review
#20
Vijay A Patel, Thomas T Zacharia, David Goldenberg, Johnathan D McGinn
BACKGROUND: Cranial neuropathies are a spectrum of disorders associated with dysfunction of one or more of the twelve cranial nerves and the subsequent anatomic structures they innervate. OBJECTIVE: The purpose of this article is to review radiographic imaging findings of end-organ aberrations secondary to cranial neuropathies. METHOD: All articles related to cranial neuropathies were retrieved through the PubMed MEDLINE NCBI database from January 1, 1991 to August 31, 2014...
March 23, 2017: Clinical Imaging
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