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Motor tract monitoring

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https://www.readbyqxmd.com/read/29733992/neuronavigation-guided-corticospinal-tract-mapping-in-brainstem-tumor-surgery-better-preservation-of-motor-function
#1
Zhibao Li, Mingran Wang, Liwei Zhang, Xing Fan, Xiaorong Tao, Lei Qi, Miao Ling, Xiong Xiao, Yuliang Wu, Dongze Guo, Hui Qiao
BACKGROUND: A new method in brainstem surgery, neuronavigation (NN)-guided corticospinal tract (CST) mapping, was used in a retrospective study of patients undergoing brainstem tumor surgery. METHODS: We studied 40 patients with a brainstem tumor who were enrolled in this study. Patients whose worst preoperative muscle strength of the four limbs was greater than three levels from normal on the Lovett scale were divided into two groups: a treatment group of 21 patients that included NN-guided CST mapping and routine intraoperative neurophysiology monitoring (IONM), and a control group of 19 patients that included routine NN and routine IONM...
May 4, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29592888/dorsal-and-ventral-horn-atrophy-is-associated-with-clinical-outcome-after-spinal-cord-injury
#2
Eveline Huber, Gergely David, Alan J Thompson, Nikolaus Weiskopf, Siawoosh Mohammadi, Patrick Freund
OBJECTIVE: To investigate whether gray matter pathology above the level of injury, alongside white matter changes, also contributes to sensorimotor impairments after spinal cord injury. METHODS: A 3T MRI protocol was acquired in 17 tetraplegic patients and 21 controls. A sagittal T2-weighted sequence was used to characterize lesion severity. At the C2-3 level, a high-resolution T2*-weighted sequence was used to assess cross-sectional areas of gray and white matter, including their subcompartments; a diffusion-weighted sequence was used to compute voxel-based diffusion indices...
March 28, 2018: Neurology
https://www.readbyqxmd.com/read/29560455/motor-deficits-following-dorsal-corticospinal-tract-transection-in-rats-voluntary-versus-skilled-locomotion-readouts
#3
Lara Bieler, Lukas Grassner, Pia Zaunmair, Christina Kreutzer, Lukas Lampe, Eugen Trinka, Julia Marschallinger, Ludwig Aigner, Sebastien Couillard-Despres
Following spinal cord injury, severe deficits result from damages to ascending and descending tracts, such as the corticospinal tract (CST) which is highly relevant for the motor execution in humans. Unfortunately, no curative treatment is available and intensive efforts are deployed in animal models, such as the CST transection model, to identify interventions providing functional regeneration after spinal cord injury. The CatWalk XT is a system for multi-parameter gait analysis of voluntary locomotion. In this study, the performance of the CatWalk XT for monitoring of functional deficits associated with dorsal CST lesion in rats was compared to skilled locomotion tests...
February 2018: Heliyon
https://www.readbyqxmd.com/read/29550649/progression-of-corticospinal-tract-dysfunction-in-pre-ataxic-spinocerebellar-ataxia-type-2-a-two-years-follow-up-tms-study
#4
Luis Velázquez-Pérez, Roberto Rodríguez-Labrada, Reidenis Torres-Vega, Ricardo Ortega-Sánchez, Jacqueline Medrano-Montero, Rigoberto González-Piña, Yaimeé Vázquez-Mojena, Georg Auburger, Ulf Ziemann
OBJECTIVE: Corticospinal tract (CST) dysfunction is common in the pre-ataxic stage of spinocerebellar ataxia type 2 (SCA2) but quantitative assessment of its progression over time has not been explored. The aim of this study was to quantify the progression of CST dysfunction in pre-ataxic SCA2 using transcranial magnetic stimulation (TMS). METHODS: Thirty-three pre-ataxic SCA2 mutation carriers and a 33 age- and gender-matched healthy controls were tested at baseline and 2-years follow-up by standardized clinical exams, validated clinical scales, and TMS...
May 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29543212/-effectiveness-of-intraoperative-monitoring-of-motor-evoked-potentials-for-predicting-changes-in-the-neurological-status-of-patients-with-cervical-spinal-cord-tumors-in-the-early-postoperative-period
#5
V S Klimov, V V Kel'makov, N V Chishchina, A V Evsyukov
AIM: The study aim was to evaluate the effectiveness of intraoperative monitoring of motor evoked potentials (MEPs) for predicting changes in the neurological status of patients with cervical spinal cord tumors in the early postoperative period. MATERIAL AND METHODS: The study included 74 patients with intradural cervical spinal cord tumors who were operated on using motor evoked potential monitoring in the period from 2013 to 2016. There were 29 (39%) males and 46 (61%) females...
2018: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/29525556/neurite-orientation-dispersion-and-density-imaging-of-the-nigrostriatal-pathway-in-parkinson-s-disease-retrograde-degeneration-observed-by-tract-profile-analysis
#6
Christina Andica, Koji Kamagata, Taku Hatano, Ayami Okuzumi, Asami Saito, Misaki Nakazawa, Ryo Ueda, Yumiko Motoi, Kouhei Kamiya, Michimasa Suzuki, Masaaki Hori, Kanako K Kumamaru, Nobutaka Hattori, Shigeki Aoki
INTRODUCTION: Parkinson's disease (PD) is marked by the degeneration of dopaminergic neurons in the nigrostriatal pathway (NSP). We aimed to identify the microstructural changes in the NSP of PD patients using neurite orientation dispersion and density imaging (NODDI). METHODS: NSPs of 29 PD patients, who were retrospectively selected from patients previously admitted to our institution, and 29 age- and gender-matched healthy controls were isolated via deterministic tractography...
February 28, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29499067/increased-risk-of-overactive-bladder-in-patients-with-idiopathic-parkinson-s-disease-insight-from-a-nationwide-population-based-cohort-study
#7
Fu-Yu Lin, Yi-Chien Yang, Cheng-Li Lin, Lukas Jyuhn-Hsiarn Lee
BACKGROUND: Idiopathic Parkinson's disease (IPD) is a progressive neurodegenerative disorder characterized by typical motor impairment. However, lower urinary tract symptoms, including urinary urgency or frequency, which are non-motor phenomena, occur frequently among patients with IPD. In this study, we assess the risk of overactive bladder (OAB) in patients with IPD. METHODS: The National Health Insurance Research Database of Taiwan was used to identify patients with IPD (IPD cohort) and four-fold controls (non-IPD cohort) from 2000 to 2010...
2018: PloS One
https://www.readbyqxmd.com/read/29462365/supratentorial-cavernous-malformations-involving-the-cortico-spinal-tract-and-sensory-motor-cortex-treatment-strategies-surgical-considerations-and-outcomes
#8
Miran Skrap, Maria Caterina Vescovi, Giada Pauletto, Marta Maieron, Barbara Tomasino, Daniele Bagatto, Francesco Tuniz
BACKGROUND: Cavernous malformations (CMs) are congenital malformations and may be located anywhere in the brain. We present a series of CMs located close to or inside of the motor-sensory cortex or corticospinal tract (CST) with clinical onset due to hemorrhage or mass effect. In such cases, surgery becomes an acceptable option. OBJECTIVE: To evaluate the role of diffusion tensor imaging (DTI), functional-magnetic-resonance imaging (fMRI), intraoperative neurophysiological monitoring, neuronavigation, and brain-mapping and the clinical results of surgical treatment of CMs in this critical location...
February 16, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29376093/lifelong-behavioral-and-neuropathological-consequences-of-repetitive-mild-traumatic-brain-injury
#9
Benoit C Mouzon, Corbin Bachmeier, Joseph O Ojo, Christopher M Acker, Scott Ferguson, Daniel Paris, Ghania Ait-Ghezala, Gogce Crynen, Peter Davies, Michael Mullan, William Stewart, Fiona Crawford
Objective: Exposure to repetitive concussion, or mild traumatic brain injury (mTBI), has been linked with increased risk of long-term neurodegenerative changes, specifically chronic traumatic encephalopathy (CTE). To date, preclinical studies largely have focused on the immediate aftermath of mTBI, with no literature on the lifelong consequences of mTBI in these models. This study provides the first account of lifelong neurobehavioral and histological consequences of repetitive mTBI providing unique insight into the constellation of evolving and ongoing pathologies with late survival...
January 2018: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29283918/clinical-utility-of-intraoperative-motor-evoked-potential-monitoring-to-prevent-postoperative-spinal-cord-injury-in-thoracic-and-thoracoabdominal-aneurysm-repair-an-audit-of-the-japanese-association-of-spinal-cord-protection-in-aortic-surgery-database
#10
Kenji Yoshitani, Kenichi Masui, Masahiko Kawaguchi, Mikito Kawamata, Manabu Kakinohana, Shinya Kato, Kyoko Hasuwa, Michiaki Yamakage, Yusuke Yoshikawa, Kimitoshi Nishiwaki, Tadashi Aoyama, Yoshimi Inagaki, Kazumasa Yamasaki, Mishiya Matsumoto, Kazuyoshi Ishida, Atsuo Yamashita, Katsuhiro Seo, Shinichi Kakumoto, Hironobu Hayashi, Yuu Tanaka, Satoshi Tanaka, Takashi Ishida, Hiroyuki Uchino, Takayasu Kakinuma, Yoshitsugu Yamada, Yoshiteru Mori, Shunsuke Izumi, Kunihiro Nishimura, Michikazu Nakai, Yoshihiko Ohnishi
BACKGROUND: Spinal cord ischemic injury is the most devastating sequela of descending and thoracoabdominal aortic surgery. Motor-evoked potentials (MEPs) have been used to intraoperatively assess motor tract function, but it remains unclear whether MEP monitoring can decrease the incidence of postoperative motor deficits. Therefore, we reviewed multicenter medical records of patients who had undergone descending and thoracoabdominal aortic repair (both open surgery and endovascular repair) to assess the association of MEP monitoring with postoperative motor deficits...
March 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29241172/neurophysiological-monitoring-and-awake-craniotomy-for-resection-of-intracranial-gliomas
#11
Taiichi Saito, Manabu Tamura, Mikhail F Chernov, Soko Ikuta, Yoshihiro Muragaki, Takashi Maruyama
Aggressive resection of intracranial gliomas has a positive impact on patients' prognosis, but is associated with a risk of neurological complications. For preservation of brain functions and avoidance of major postoperative morbidity various methods of intraoperative neurophysiological monitoring have been introduced into clinical practice. At present, somatosensory evoked potentials (SSEP), motor evoked potentials (MEP), visual evoked potentials (VEP), brainstem auditory evoked potentials (BAEP), and electrocorticography (ECoG) are used routinely during neurosurgical procedures...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29230170/the-dancing-brain-structural-and-functional-signatures-of-expert-dance-training
#12
Agnieszka Z Burzynska, Karolina Finc, Brittany K Taylor, Anya M Knecht, Arthur F Kramer
Dance - as a ritual, therapy, and leisure activity - has been known for thousands of years. Today, dance is increasingly used as therapy for cognitive and neurological disorders such as dementia and Parkinson's disease. Surprisingly, the effects of dance training on the healthy young brain are not well understood despite the necessity of such information for planning successful clinical interventions. Therefore, this study examined actively performing, expert-level trained college students as a model of long-term exposure to dance training...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28972128/distinct-laterality-in-forelimb-movement-representations-of-rat-primary-and-secondary-motor-cortical-neurons-with-intratelencephalic-and-pyramidal-tract-projections
#13
Shogo Soma, Akiko Saiki, Junichi Yoshida, Alain Ríos, Masanori Kawabata, Yutaka Sakai, Yoshikazu Isomura
Two distinct motor areas, the primary and secondary motor cortices (M1 and M2), play crucial roles in voluntary movement in rodents. The aim of this study was to characterize the laterality in motor cortical representations of right and left forelimb movements. To achieve this goal, we developed a novel behavioral task, the Right-Left Pedal task, in which a head-restrained male rat manipulates a right or left pedal with the corresponding forelimb. This task enabled us to monitor independent movements of both forelimbs with high spatiotemporal resolution...
November 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28758184/motor-evoked-potentials-and-bis-guided-anaesthesia-in-image-guided-mini-invasive-neurosurgery-of-supratentorial-tumors-nearby-the-cortico-spinal-tract
#14
Roberto Cordella, Eleonora Orena, Francesco Acerbi, Elena Beretta, Dario Caldiroli, Francesco Dimeco, Carla Carozzi
AIM: to describe and evaluate the anaesthesiological regimen used in neurophysiologically monitored image-guided mini-invasive neurosurgery. MATERIAL AND METHODS: 24 patients underwent elective surgery under general anaesthesia that was administered through Target Controlled Infusion (TCI) for effect-site concentration (Ce) of Propofol and Remifentanil, targeting Bispectral Index (BIS) in the 40-60 intervals. Stimulating intensity of transcranial motor evoked potentials (tMEP), BIS index, Propofol and Remifentanil Ce were collected at MEPs threshold (T) definition (respectively BIS@T, CeProp@T and CeRemi@T)...
June 14, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28701541/afferent-input-and-sensory-function-after-human-spinal-cord-injury
#15
Recep A Ozdemir, Monica A Perez
Spinal cord injury (SCI) often disrupts the integrity of afferent (sensory) axons projecting through the spinal cord dorsal columns to the brain. Examinations of ascending sensory tracts, therefore, are critical for monitoring the extent of SCI and recovery processes. In this review, we discuss the most common electrophysiological techniques used to assess transmission of afferent inputs to the primary motor cortex (i.e., afferent input-induced facilitation and inhibition) and the somatosensory cortex [i.e...
January 1, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28529055/intraoperative-mapping-and-monitoring-of-the-pyramidal-tract-using-endoscopic-depth-electrodes
#16
Yukinori Akiyama, Shunya Ohtaki, Katsuya Komatsu, Kentaro Toyama, Rei Enatsu, Takeshi Mikami, Masahiko Wanibuchi, Nobuhiro Mikuni
OBJECTIVE: To evaluate motor function during neuroendoscopic resectioning of deep-seated brain tumors using endoscopically guided depth electrodes. METHODS: For 12 cases of thalamic tumors, including high-grade gliomas, germinomas, and malignant lymphomas, depth electrodes were inserted using endoscopic guides between the tumor and the pyramidal tract in the thalamus. Motor-evoked potentials (MEPs) were continuously recorded during neuroendoscopic resectioning of the tumors...
September 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28524753/continuous-mapping-of-the-corticospinal-tracts-in-intramedullary-spinal-cord-tumor-surgery-using-an-electrified-ultrasonic-aspirator
#17
Ori Barzilai, Zvi Lidar, Shlomi Constantini, Khalil Salame, Yifat Bitan-Talmor, Akiva Korn
Intramedullary spinal cord tumors (IMSCTs) represent a rare entity, accounting for 4%-10% of all central nervous system tumors. Microsurgical resection of IMSCTs is currently considered the primary treatment modality. Intraoperative neurophysiological monitoring (IONM) has been shown to aid in maximizing tumor resection and minimizing neurological morbidity, consequently improving patient outcome. The gold standard for IONM to date is multimodality monitoring, consisting of both somatosensory evoked potentials, as well as muscle-based transcranial electric motor evoked potentials (tcMEPs)...
August 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28464582/-clinical-useness-of-multimodal-techniques-in-microsurgical-resection-of-cerebral-arteriovenous-malformation
#18
Y Y Zhang, J L Jiang, Z H Sun, C Wu, W Shi, Z Xue, S Y Feng, X G Yu
Objective: To explore the clinical useness of intraoperative functional neuronavigation and fluorescent indocyanine green(ICG) angiography as well as electrophysiological evaluation during microsurgical resection of cerebral arteriovenous malformations (AVM). Methods: A series of 42 consecutive cases with AVM underwent microsurgery by intraoperative functional neuronavigation at Department of Neurosurgery of People's Liberation Army General Hospital from January 2009 to February 2015 were retrospectively analyzed...
May 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28392455/the-effect-of-sparkling-water-on-intraluminal-formulation-behavior-and-systemic-drug-performance
#19
Jens Van Den Abeele, Joachim Brouwers, Eveline Deloose, Jan Tack, Patrick Augustijns
In the context of mediating intra- and interindividual variability in systemic drug exposure after oral drug administration, this small-scale, crossover study aimed to investigate the effect of drug intake with sparkling water on fasted state gastric motor function and subsequent (variability in) intraluminal and systemic drug disposition. For this purpose, healthy human volunteers were asked to ingest a conventional paracetamol tablet with either tap or sparkling water, after which antroduodenal motility and intraluminal and systemic drug disposition were monitored as a function of time...
April 7, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28362960/ipsilateral-motor-innervation-discovered-incidentally-on-intraoperative-monitoring-a-case-report
#20
Jerry Ku, Daniel Mendelsohn, Jason Chew, Jason Shewchuk, Charles Dong, Ryojo Akagami
Background and importance: Lesions in the corticospinal tract above the decussation at the medullary pyramids almost universally produce contralateral deficits. Rare cases of supratentorial lesions causing ipsilateral motor deficits have been reported previously, but only ever found secondary to stroke or congenital pyramidal tract malformations. Clinical presentation: Herein, we report a case of ipsilateral corticospinal tract innervation discovered incidentally with intraoperative monitoring during a microsurgical resection of a vestibular schwannoma...
March 1, 2017: Neurosurgery
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