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Motor Cortex/surgery

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https://www.readbyqxmd.com/read/29777890/cortical-activation-changes-in-hirayama-disease-following-anterior-cervical-decompression-and-fusion
#1
Hongli Wang, Yiwei Wu, Jian Song, Jianyuan Jiang, Feizhou Lu, Xiaosheng Ma, Xinlei Xia
BACKGROUND: Spinal cord injury may cause cortical reconstruction. We, therefore, explored thechanges in cortical activation before and after anterior cervical decompression and fusion surgery in patients with Hirayama disease (HD). METHODS: 17 HD cases were performed anterior cervical decompression and fusion surgery. BOLD-fMRI scan was performed preoperatively, 3 months, 6 months and 1 year after surgery. Activated voxels were compared between both hands after adjusting for head motion, slice timing, spatial normalization and image smoothing...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29775149/added-value-of-multiple-versus-single-sessions-of-repetitive-transcranial-magnetic-stimulation-in-predicting-motor-cortex-stimulation-efficacy-for-refractory-neuropathic-pain
#2
Benjamin Pommier, Charles Quesada, Camille Fauchon, Christophe Nuti, François Vassal, Roland Peyron
OBJECTIVE Selection criteria for offering patients motor cortex stimulation (MCS) for refractory neuropathic pain are a critical topic of research. A single session of repetitive transcranial magnetic stimulation (rTMS) has been advocated for selecting MCS candidates, but it has a low negative predictive value. Here the authors investigated whether multiple rTMS sessions would more accurately predict MCS efficacy. METHODS Patients included in this longitudinal study could access MCS after at least four rTMS sessions performed 3-4 weeks apart...
May 18, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29733410/perioperative-multimodal-evaluation-and-surgical-tactics-of-tumor-related-epilepsy-2-dimensional-operative-video
#3
Chengxin Ma, Rui Feng, N U Farrukh Hameed, Jie Zhang, Dongxiao Zhuang, Jinsong Wu
Treatment of tumor-related epilepsy (TRE), especially for tumors near critical areas, requires surgeons to strike a balance between the epileptic benefit and functional outcome after surgery. Here, we present a case in which multimodal evaluation facilitated the achievement of such surgical balance. Informed patient consent was obtained. A 17-yr-old female presented with seizure attacks for 2 yr. Magnetic resonance imaging (MRI) revealed a right parietal mass lesion with hypointense signal on T1W imaging, hyperintense signal on T2W imaging, and homogeneous enhancement...
May 4, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29725362/resveratrol-attenuates-neurological-deficit-and-neuroinflammation-following-intracerebral-hemorrhage
#4
Jia-Chen Cai, Wei Liu, Fei Lu, Wen-Bing Kong, Xin-Xuan Zhou, Peng Miao, Cheng-Xiang Lei, Yan Wang
Resveratrol (RESV) improves histopathological and behavioral outcomes in diseases of the central nervous system. However, to the best of our knowledge, there have been no studies investigating its neuroprotective effects on secondary brain injury following intracerebral hemorrhage (ICH). The aim of the present study was to evaluate the neuroprotective function of resveratrol following ICH. Male Sprague-Dawley rats were randomly divided into 3 groups: Sham, ICH and ICH+RESV groups. Rats underwent ICH and received an intraperitoneal injection of RESV daily...
May 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29689406/hyperperfusion-syndrome-after-trapping-with-high-flow-bypass-for-a-giant-paraclinoid-internal-carotid-artery-aneurysm
#5
Masanao Mohri, Toshiya Ichinose, Naoyuki Uchiyama, Kouichi Misaki, Iku Nambu, Yasushi Takabatake, Mitsutoshi Nakada
BACKGROUND: Hyperperfusion syndrome associated with aneurysm surgery is rare. The occurrence of the syndrome after trapping with high-flow bypass has not been described previously. Herein, we present a case of the syndrome occurring after trapping with high-flow bypass of an unruptured giant paraclinoid internal carotid artery (ICA) aneurysm. CASE DESCRIPTION: The patient was a 68-year-old woman with progressive loss of vision in her left eye. After a diagnosis of a left giant ICA aneurysm, she underwent successful trapping with high-flow bypass...
April 21, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29683871/sensorimotor-cortex-atrophy-in-patients-with-cervical-spondylotic-myelopathy
#6
Lanbo Wang, Bing Yu, Qun Li, Fei Qi, Qiyong Guo
Previous studies have shown compensatory adaptive changes in cerebral functions before surgery in patients with cervical spondylotic myelopathy (CSM), especially in the sensorimotor cortices. However, the structural changes in the sensorimotor cortices in patients with CSM remain poorly understood. The aim of this study was to assess the volumetric changes in the sensorimotor cortices using morphological MRI and to correlate these changes with clinical scales. We hypothesize that CSM causes atrophy in the sensorimotor cortices, which results in functional changes during CSM progression...
April 20, 2018: Neuroreport
https://www.readbyqxmd.com/read/29653127/evaluation-of-early-chronic-functional-outcomes-and-their-relationship-to-pre-frontal-cortex-and-hippocampal-pathology-following-moderate-severe-traumatic-brain-injury
#7
Alina Arulsamy, Jason Teng, Holly Colton, Frances Corrigan, Lyndsey Collins-Praino
TBI is a significant risk factor for the development of dementia, with the interaction between structural damage from TBI and neuroinflammation potentially driving this relationship. This study investigated the early chronic post-TBI neuroinflammatory response and its relationship to both neurodegenerative pathology and functional impairment up to 3 months post-injury. Sprague-Dawley rats underwent either sham surgery or the Marmarou model of diffuse moderate-severe TBI. At 1-month and 3-months post-injury, a functional battery encompassing motor function, depressive-like behaviour, anxiety and cognition was performed...
April 10, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29574593/longitudinal-brain-activation-changes-related-to-electrophysiological-findings-in-patients-with-cervical-spondylotic-myelopathy-before-and-after-spinal-cord-decompression-an-fmri-study
#8
Lumír Hrabálek, Pavel Hok, Petr Hluštík, Eva Čecháková, Tomáš Wanek, Pavel Otruba, Miroslav Vaverka, Petr Kaňovský
BACKGROUND: Cervical spondylotic myelopathy (CSM) is the most common cause of spinal cord dysfunction, potentially leading to severe disability. Abnormal cervical spine magnetic resonance imaging (MRI) and motor evoked potentials (MEPs) are independent predictors of disease progression. Abnormal MRI is accompanied by various activation changes in functional brain MRI (fMRI), whereas preoperative and postoperative fMRI adaptations associated with abnormal preoperative MEP remain unknown...
March 25, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29547990/quality-of-life-after-motor-cortex-stimulation-clinical-results-and-systematic-review-of-the-literature
#9
Daniella C Parravano, Daniel A Ciampi, Erich T Fonoff, Bernardo Monaco, Jessie Navarro, Lin T Yeng, Manoel J Teixeira, Clement Hamani
BACKGROUND: Motor cortex stimulation (MCS) is routinely used for the treatment of chronic neuropathic pain but its effect on quality of life remains uncertain. OBEJCTIVE: To systematically review the published literature on MCS and quality of life and report the effects of this therapy in a series of patients prospectively followed in our center. METHODS: The systematic literature review was conducted using the search words "motor cortex stimulation and pain and neurosurgery" and "motor cortex stimulation and pain and quality of life...
March 14, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29510282/multimodal-approach-for-radical-excision-of-focal-cortical-dysplasia-by-combining-advanced-magnetic-resonance-imaging-data-to-intraoperative-ultrasound-electrocorticography-and-cortical-stimulation-a-preliminary-experience
#10
Giovanni Tringali, Beatrice Bono, Ivano Dones, Roberto Cordella, Giuseppe Didato, Flavio Villani, Francesco Prada
BACKGROUND AND OBJECTIVE: Type II focal cortical dysplasia is the most common malformation of cortical development associated with drug resistant epilepsy and susceptible to surgical resection. Although, at present, advanced imaging modalities are capable of detecting most cortical disorders, it is still a challenge for the surgeon to visualize them intraoperatively. The lack of direct identification between normal brain and subtle dysplastic tissue may explain the poor results in terms of being seizure-free versus other forms of epilepsy...
May 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29501800/magnesium-administration-after-experimental-traumatic-brain-injury-improves-decision-making-skills
#11
Jennica M Young, Michael R Hoane
After sustaining a traumatic brain injury (TBI), a person's ability to make daily decisions can be affected. Simple tasks such as, deciding what to wear are no longer effortless choices, but are instead difficult decisions. This study explored the use of a discrimination task with a magnesium treatment in order to examine how decision-making skills are affected after TBI and if the treatment helped to attenuate cognitive and motor impairments. Thirty-one male rats were separated into MAG/TBI, VEH/TBI, or VEH/Sham groups...
March 1, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29462365/supratentorial-cavernous-malformations-involving-the-cortico-spinal-tract-and-sensory-motor-cortex-treatment-strategies-surgical-considerations-and-outcomes
#12
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/29439365/adaptive-motor-cortex-plasticity-following-grip-reconstruction-in-individuals-with-tetraplegia
#13
Lina Bunketorp Käll, Robert J Cooper, Johanna Wangdell, Jan Fridén, Malin Björnsdotter
BACKGROUND: Tendon transfer is a surgical technique for restoring upper limb motor control in patients with cervical spinal cord injuries (SCI), and offers a rare window into cortical neuroplasticity following regained arm and hand function. OBJECTIVE: Here, we aimed to examine neuroplasticity mechanisms related to re-established voluntary motor control of thumb flexion following tendon transfer. METHODS: We used functional Magnetic Resonance Imaging (fMRI) to test the hypothesis that restored limb control following tendon transfer is mediated by activation of that limb's area of the primary motor cortex...
2018: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/29427344/directional-communication-during-movement-execution-interferes-with-tremor-in-parkinson-s-disease
#14
Georgios Naros, Florian Grimm, Daniel Weiss, Alireza Gharabaghi
BACKGROUND: Both the cerebello-thalamo-cortical circuit and the basal ganglia/cortical motor loop have been postulated to be generators of tremor in PD. The recent suggestion that the basal ganglia trigger tremor episodes and the cerebello-thalamo-cortical circuitry modulates tremor amplitude combines both competing hypotheses. However, the role of the STN in tremor generation and the impact of proprioceptive feedback on tremor suppression during voluntary movements have not been considered in this model yet...
February 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29397529/protein-energy-malnutrition-exacerbates-stroke-induced-forelimb-abnormalities-and-dampens-neuroinflammation
#15
Mariam Alaverdashvili, Sally Caine, Xue Li, Mark J Hackett, Michael P Bradley, Helen Nichol, Phyllis G Paterson
Protein-energy malnutrition (PEM) pre-existing at stroke onset is believed to worsen functional outcome, yet the underlying mechanisms are not fully understood. Since brain inflammation is an important modulator of neurological recovery after stroke, we explored the impact of PEM on neuroinflammation in the acute period in relation to stroke-initiated sensori-motor abnormalities. Adult rats were fed a low-protein (LP) or normal protein (NP) diet for 28 days before inducing photothrombotic stroke (St) in the forelimb region of the motor cortex or sham surgery; the diets continued for 3 days after the stroke...
February 3, 2018: Translational Stroke Research
https://www.readbyqxmd.com/read/29392232/gray-matter-alteration-associated-with-pain-catastrophizing-in-patients-6-months-after-lumbar-disk-surgery-a-voxel-based-morphometry-study
#16
Omar Chehadi, Boris Suchan, Kerstin Konietzny, Odo Köster, Tobias Schmidt-Wilcke, Monika I Hasenbring
Introduction: Pain catastrophizing (PC), the increased attention to harmful aspects of pain (magnification), and the belief of low controllability (helplessness) has been shown to be important in the maintenance of pain. A growing research on structural alterations in chronic pain revealed an association between PC and brain areas that are involved in affective and cognitive pain processing. However, little is known about a differential effect of the components magnification and helplessness...
September 2017: Pain Reports (Baltimore, Md.)
https://www.readbyqxmd.com/read/29387530/connectivity-derived-thalamic-segmentation-in-deep-brain-stimulation-for-tremor
#17
Harith Akram, Viswas Dayal, Philipp Mahlknecht, Dejan Georgiev, Jonathan Hyam, Thomas Foltynie, Patricia Limousin, Enrico De Vita, Marjan Jahanshahi, John Ashburner, Tim Behrens, Marwan Hariz, Ludvic Zrinzo
The ventral intermediate nucleus (VIM) of the thalamus is an established surgical target for stereotactic ablation and deep brain stimulation (DBS) in the treatment of tremor in Parkinson's disease (PD) and essential tremor (ET). It is centrally placed on a cerebello-thalamo-cortical network connecting the primary motor cortex, to the dentate nucleus of the contralateral cerebellum through the dentato-rubro-thalamic tract (DRT). The VIM is not readily visible on conventional MR imaging, so identifying the surgical target traditionally involved indirect targeting that relies on atlas-defined coordinates...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29374546/cortical-reorganizations-for-recovery-from-depressive-state-after-spinal-decompression-surgery
#18
Masahiro Sawada, Takuro Nakae, Toshihiro Munemitsu, Masato Hojo
BACKGROUND: Depressed mood following neuronal damage not only impedes functional recovery but also negatively affects quality of life for many patients. Depressed patients with cervical myelopathy often show improvement in both mood and motor function after spinal decompression surgery; however, the neural mechanism underlying this psychological benefit from surgery remains unclear. The aim of this study was to clarify the brain sites that relate to alleviation of depression after spinal decompression surgery...
April 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29360588/motor-cortex-reorganization-in-patients-with-glioma-assessed-by-repeated-navigated-transcranial-magnetic-stimulation-a-longitudinal-study
#19
Anne Barz, Anika Noack, Peter Baumgarten, Volker Seifert, Marie-Therese Forster
OBJECTIVE: Evidence for cerebral reorganization after resection of low-grade glioma has mainly been obtained by serial intraoperative cerebral mapping. Noninvasively collected data on cortical plasticity in tumor patients over a surgery-free period are still scarce. The present study therefore aimed at evaluating motor cortex reorganization by navigated transcranial magnetic stimulation (nTMS) in patients after perirolandic glioma surgery. METHODS: nTMS was performed preoperatively and postoperatively in 20 patients, separated by 26...
April 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29355798/awake-surgery-for-gliomas-within-the-right-inferior-parietal-lobule-new-insights-into-the-functional-connectivity-gained-from-stimulation-mapping-and-surgical-implications
#20
Alice Rolland, Guillaume Herbet, Hugues Duffau
OBJECTIVE: Little is known about the functional role of the white matter connections running within and around the right inferior parietal lobule (IPL). We used direct electrostimulation during awake surgery to investigate this connectivity and to avoid permanent deficit after resection for right IPL gliomas. METHODS: We reviewed patients who underwent awake mapping for a glioma involving the right IPL. Resection was achieved up to functional corticosubcortical boundaries detected by electrostimulation...
April 2018: World Neurosurgery
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