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Trigeminal nerve

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https://www.readbyqxmd.com/read/28542900/the-sensory-trigeminal-complex-and-the-organisation-of-its-primary-afferents-in-the-zebra-finch-taeniopygia-guttata
#1
Macarena Faunes, J Martin Wild, Thomas Finger
Our knowledge of the avian sensory trigeminal system has been largely restricted to the principal trigeminal nucleus (PrV) and its ascending projections to the forebrain. Studies addressing the cytoarchitecture and organisation of afferent input to the sensory trigeminal complex, which includes both the PrV and the nuclei of the descending trigeminal tract (nTTD), have only been performed in pigeons and ducks. Here we extend such an analysis to a songbird, the zebra finch (Taeniopygia guttata). We describe the cytoarchitecture of the sensory trigeminal complex, the patterns of calbindin-like and substance P-like immunoreactivity, and the organisation of afferents from the three branches of the trigeminal nerve and from the lingual branch of the hypoglossal nerve...
May 24, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28542026/combination-drug-therapy-of-pioglitazone-and-d-cycloserine-attenuates-chronic-orofacial-neuropathic-pain-and-anxiety-by-improving-mitochondrial-function-following-trigeminal-nerve-injury
#2
Danielle N Lyons, Liping Zhang, Jignesh D Pandya, Robert J Danaher, Fei Ma, Craig S Miller, Patrick G Sullivan, Cristian Sirbu, Karin N Westlund
OBJECTIVES: The study aim was to determine how peripheral trigeminal nerve injury affects mitochondrial respiration and to test efficacy of combined treatment with two FDA approved drugs with potential for improving mitochondrial bioenergetics, pain and anxiety related behaviors in a chronic orofacial neuropathic pain mouse model. METHODS: Efficacy of (R)-(+)-4-amino-3-isoxazolidinone (D-cycloserine, DCS), an NMDA antagonist/agonist, and Pioglitazone (PIO), a selective agonist of nuclear receptor peroxisome proliferator-activated receptor gamma (PPARγ) was investigate in the trigeminal inflammatory compression (TIC) neuropathic nerve injury mouse model...
May 24, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28541256/modulation-of-brainstem-activity-and-connectivity-by-respiratory-gated-auricular-vagal-afferent-nerve-stimulation-in-migraine-patients
#3
Ronald G Garcia, Richard L Lin, Jeungchan Lee, Jieun Kim, Riccardo Barbieri, Roberta Sclocco, Ajay D Wasan, Robert R Edwards, Bruce R Rosen, Nouchine Hadjikhani, Vitaly Napadow
Migraine pathophysiology includes altered brainstem excitability, and recent neuromodulatory approaches aimed at controlling migraine episodes have targeted key brainstem relay and modulatory nuclei. In this study, we evaluated the impact of respiratory-gated auricular vagal afferent nerve stimulation (RAVANS), a novel neuromodulatory intervention based on an existing transcutaneous vagus nerve stimulation approach, in the modulation of brainstem activity and connectivity in migraine patients. We applied 3T-functional magnetic resonance imaging with improved in-plane spatial resolution (2...
April 25, 2017: Pain
https://www.readbyqxmd.com/read/28539391/reevaluation-of-reflex-responses-of-the-human-masseter-muscle-to-electrical-lip-stimulation
#4
Paulius Uginčius, Gizem Yilmaz, Oguz Sebik, Kemal Sitki Turker
We examined the reflex response of the human masseter muscle to electrical stimulation of the lip using both single motor unit and surface electromyogram based methods. Using the classical analysis methods, reflex response to mild electrical stimuli generated two distinct short-lasting inhibitions. This pattern may reflect the development of combinations of short and long latency inhibitory postsynaptic potentials as a result of the mildly painful electrical lip stimulation. However, this pattern appearing in the classical analysis methods may have developed as a consequence of earlier responses and may not be genuine...
May 24, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28535550/high-voltage-pulsed-radiofrequency-for-the-treatment-of-refractory-neuralgia-of-the-infraorbital-nerve-a-prospective-double-blinded-randomized-controlled-study
#5
Fang Luo, Tao Wang, Ying Shen, Lan Meng, Jingjing Lu, Nan Ji
BACKGROUND: A recent study showed that 50% of patients who suffered from refractory neuralgia of the infraorbital nerve obtained satisfactory efficacy after pulsed radiofrequency (PRF) treatment. A pilot study showed that increasing the output voltage of PRF significantly improved the efficacy for trigeminal neuralgia; however, whether increasing the output voltage of PRF can improve the treatment outcomes for neuralgia of the infraorbital nerve is unknown. OBJECTIVE: To evaluate the efficacy and safety of high voltage PRF treatment in comparison with standard voltage PRF for neuralgia of the infraorbital nerve...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28533998/ipilimumab-as-a-cause-of-severe-pan-colitis-and-colonic-perforation
#6
Raj Shah, Danielle Witt, Talal Asif, Fahad F Mir
Ipilimumab is a human monoclonal antibody that functions as a cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) inhibitor that is used to treat malignant melanoma. Due to ipilimumab's removal of immune regulation, specifically through the inactivation of CTLA-4, it is commonly associated with inflammatory and autoimmune events. Gastrointestinal (GI) related immune-related adverse events such as diarrhea occur in 29% of patients with 7.6% of patients specifically suffering from colitis. We describe a case of colonic perforation with ipilimumab use...
April 20, 2017: Curēus
https://www.readbyqxmd.com/read/28533177/immunohistochemical-comparison-of-astrocytic-mglur5-upregulation-in-infraorbital-nerve-versus-sciatic-nerve-ligated-rat
#7
Benoit Michot, Ronald Deumens, Emmanuel Hermans
The differential pharmacological responsiveness of cephalic and extra-cephalic neuropathic pain has been proposed to relate to distinct mechanisms that may involve neuroinflammatory reactions mediated by glial cells. Astrocytes are particularly important for neuronal sensitization in neuropathic pain, in part through modulation of glutamatergic transmission. Because the metabotropic glutamate receptor 5 (mGluR5) is involved in the astrocytic regulation of the glutamatergic system, we investigated modifications of its expression in models of cephalic versus extra-cephalic neuropathic pain...
May 19, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28532907/nerve-atrophy-and-a-small-trigeminal-pontine-angle-in-primary-trigeminal-neuralgia-a-morphometric-mri-study
#8
Jian Cheng, Jinli Meng, Wenke Liu, Heng Zhang, Ding Lei, Xuhui Hui
OBJECTIVE: To prospectively evaluate the morphological and structural changes of trigeminal nerve in patients with trigeminal neuralgia (TN) and to perform a comparison with healthy controls. METHODS: We conducted a prospective case-control study of 60 consective patients diagnosed with TN and 30 sex-and age-matched healthy controls. All subjects underwent high-resolution three-dimensional MRI. The volume and length of the cisternal segment of trigeminal nerve and the angle between the trigeminal nerve and the anterior surface of the pons (trigeminal pontine angle) were measured and compared...
May 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28531285/paratrigeminal-paraclival-precavernous-or-all-of-the-above-a-circumferential-anatomical-study-of-the-c3-c4-transitional-segment-of-the-internal-carotid-artery
#9
Eleonora Marcati, Norberto Andaluz, Sebastien C Froelich, Lee A Zimmer, James L Leach, Juan Carlos Fernandez-Miranda, Almaz Kurbanov, Jeffrey T Keller
BACKGROUND: Although the term paraclival carotid pervades recent skull base literature, no clear consensus exists regarding boundaries or anatomical segments. OBJECTIVE: To reconcile various internal carotid artery (ICA) nomenclatures for transcranial and endoscopic-endonasal perspectives, we reexamined the transition between lacerum (C3) and cavernous (C4) segments using a C1-C7 segments schema. In this cadaveric study, we obtained a 360°-circumferential view integrating histological, microsurgical, endoscopic, and neuroradiological analyses of this C3-C4 region and identified a distinct transitional segment...
May 21, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28530470/cd73-controls-extracellular-adenosine-generation-in-the-trigeminal-nociceptive-nerves
#10
X Liu, L Ma, S Zhang, Y Ren, R T Dirksen
Purinergic signaling is involved in pain generation and modulation in the nociceptive sensory nervous system. Adenosine triphosphate (ATP) induces pain via activation of ionotropic P2X receptors while adenosine mediates analgesia via activation of metabotropic P1 receptors. These purinergic signaling are determined by ecto-nucleotidases that control ATP degradation and adenosine generation. Using enzymatic histochemistry, we detected ecto-AMPase activity in dental pulp, trigeminal ganglia (TG) neurons, and their nerve fibers...
June 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28524797/the-relationship-of-dose-to-nerve-volume-in-predicting-pain-recurrence-after-stereotactic-radiosurgery-in-trigeminal-neuralgia
#11
Amparo Wolf, Amy Tyburczy, Jason Chao Ye, Girish Fatterpekar, Joshua S Silverman, Douglas Kondziolka
OBJECTIVE Approximately 75%-92% of patients with trigeminal neuralgia (TN) achieve pain relief after Gamma Knife surgery (GKS), although a proportion of these patients will experience recurrence of their pain. To evaluate the reasons for durability or recurrence, this study determined the impact of trigeminal nerve length and volume, the nerve dose-volume relationship, and the presence of neurovascular compression (NVC) on pain outcomes after GKS for TN. METHODS Fifty-eight patients with 60 symptomatic nerves underwent GKS for TN between 2013 and 2015, including 15 symptomatic nerves secondary to multiple sclerosis (MS)...
May 19, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28524125/-surgical-management-of-venous-compression-causing-trigeminal-neuralgia
#12
V K Poshataev, A N Konovalov, V N Shimanskiy
Venous compression is a rare cause of trigeminal neuralgia (TN). Vascular decompression of the trigeminal nerve root, as the only etiopathogenetic treatment of trigeminal neuralgia, is a well-known procedure that is extensively used at various neurosurgical clinics. As the number of interventions for TN increases, the absolute number of surgeries for eliminating venous compression of the trigeminal nerve also grows. Five hundred TN patients underwent surgery at the Neurosurgical Institute in the period from 2000 to 2015...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28522210/novel-trigeminal-slice-preparation-method-for-studying-mechanisms-of-nociception-transmission
#13
Mikiko Hirahara, Naoshi Fujiwara, Kenji Seo
BACKGROUND: The trigeminal subnucleus caudalis (Vc) plays a critical role in transmission and modulation of nociceptive afferent inputs, and exhibits a similar layer construction to the spinal dorsal horn. However, afferent inputs enter the brainstem and project to a separately located nucleus. It has previously been difficult to record responses of the Vc to afferent fiber activation in a brainstem slice preparation. The aim of the present study was to establish a novel brainstem slice preparation method to study trigeminal nociceptive transmission mechanisms...
May 15, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28521670/intranasal-drug-delivery-a-non-invasive-approach-for-the-better-delivery-of-neurotherapeutics
#14
Umesh Gupta, Hitesh Kumar, Gaurav Mishra, Ashok Kumar Sharma, Avinash Gothwal, Prashant Kesharwani
BACKGROUND: The convoluted pathophysiology of brain disorders along with penetration issue of drugs to brain represents major hurdle that requires some novel therapies. The blood-brain barrier (BBB) denotes a rigid barrier for delivery of therapeutics in vivo, to overcome this barrier intranasal delivery is an excellent strategy to deliver the drug directly to brain via olfactory and trigeminal nerve pathways that originate as olfactory neuro-epithelium in the nasal cavity and terminate in brain...
May 14, 2017: Pharmaceutical Nanotechnology
https://www.readbyqxmd.com/read/28518084/subcutaneous-trigeminal-nerve-field-stimulation-for-refractory-facial-pain
#15
Martin Jakobs, Sigrid Schuh-Hofer, Andreas Unterberg, Rezvan Ahmadi
Chronic or neuropathic trigeminal facial pain can be challenging to treat. Neurosurgical procedures should be applied when conservative treatment fails. Neuromodulation techniques for chronic facial pain include deep brain stimulation and motor cortex stimulation, which are complex to perform. Subcutaneous nerve field stimulation is certified for chronic back pain and is the least invasive form of neuromodulation. We applied this technique to treat chronic and neuropathic trigeminal pain as an individual therapy concept...
May 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28517492/practical-considerations-of-linear-accelerator-based-frameless-extracranial-radiosurgery-for-treatment-of-occipital-neuralgia-for-nonsurgical-candidates
#16
Travis R Denton, Lisa B E Shields, Jonathan N Howe, Todd S Shanks, Aaron C Spalding
Occipital neuralgia generally responds to medical or invasive procedures. Repeated invasive procedures generate increasing complications and are often contraindicated. Stereotactic radiosurgery (SRS) has not been reported as a treatment option largely due to the extracranial nature of the target as opposed to the similar, more established trigeminal neuralgia. A dedicated phantom study was conducted to determine the optimum imaging studies, fusion matrices, and treatment planning parameters to target the C2 dorsal root ganglion which forms the occipital nerve...
May 18, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28514232/ppar%C3%AE-agonists-attenuate-trigeminal-neuropathic-pain
#17
Danielle N Lyons, Liping Zhang, Robert J Danaher, Craig S Miller, Karin N Westlund
The aim of this study is to investigate the role of peroxisome proliferator-activated receptor-gamma isoform (PPARγ), in trigeminal neuropathic pain utilizing a novel mouse trigeminal inflammatory compression (TIC) injury model. The study determined that the PPARγ nuclear receptor plays a significant role in trigeminal nociception transmission, evidenced by: (1) Intense PPARγ immunoreactivity is expressed 3 weeks after TIC nerve injury in the spinal trigeminal caudalis, the termination site of trigeminal nociceptive nerve fibers...
May 16, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28512048/combined-hyperactive-dysfunction-syndrome-of-the-cranial-nerves-a-retrospective-systematic-study-of-clinical-characteristics-in-44-patients
#18
Jingwei Cao, Jie Jiao, Zhenhui Du, Wenzhe Xu, Bin Sun, Feng Li, Yuguang Liu
BACKGROUND: Combined hyperactive dysfunction syndrome (HDS) is defined as the combination symptoms arising from overactivity in cranial nerves specifically, trigeminal neuralgia (TN), hemifacial spasm (HFS), and glossopharyngeal neuralgia (GPN) without an obvious explanatory structural lesion. The study aims to retrospectively analyze the clinical characteristics of combined HDS treated with microvascular decompression (MVD) in a single institution. METHODS: A total of 1450 patients with HDS were treated with MVD in our department during a 10-year period, among which 44 cases of combined HDS were identified...
May 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28499808/high-contrast-high-resolution-imaging-of-posttraumatic-mandibular-nerve-by-3dac-propeller-magnetic-resonance-imaging-correlation-with-the-severity-of-sensory-disturbance
#19
Makoto Terumitsu, Hitoshi Matsuzawa, Kenji Seo, Masaki Watanabe, Shigenobu Kurata, Akiko Suda, Tsutomu Nakada
OBJECTIVE: Magnetic resonance neurography reveals abnormal morphologies of regenerated nerves and overgrown connective tissue in injured trigeminal nerves, suggesting neuroma formation. We hypothesized that such deformities and scar formation contribute to pain symptoms. STUDY DESIGN: High-contrast high-resolution magnetic resonance imaging was utilized to evaluate the inferior alveolar nerve and lingual nerve following traumatic injury in 19 patients. The relationship between the morphologic classification and severity of the sensory disorder was assessed...
March 14, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28496430/cholinergic-nociceptive-mechanisms-in-rat-meninges-and-trigeminal-ganglia-potential-implications-for-migraine-pain
#20
Irina Shelukhina, Nikita Mikhailov, Polina Abushik, Leniz Nurullin, Evgeny E Nikolsky, Rashid Giniatullin
BACKGROUND: Parasympathetic innervation of meninges and ability of carbachol, acetylcholine (ACh) receptor (AChR) agonist, to induce headaches suggests contribution of cholinergic mechanisms to primary headaches. However, neurochemical mechanisms of cholinergic regulation of peripheral nociception in meninges, origin place for headache, are almost unknown. METHODS: Using electrophysiology, calcium imaging, immunohistochemistry, and staining of meningeal mast cells, we studied effects of cholinergic agents on peripheral nociception in rat hemiskulls and isolated trigeminal neurons...
2017: Frontiers in Neurology
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