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Functional brain surgery

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https://www.readbyqxmd.com/read/27909194/severity-assessment-and-scoring-for-neurosurgical-models-in-rodents
#1
Sarah Pinkernell, Katrin Becker, Ute Lindauer
The most important acute neurological diseases seen at neurosurgery departments are traumatic brain injuries (TBI) and subarachnoid hemorrhages (SAH). In both diseases the pathophysiological sequela are complex and have not been fully understood up to now, and rodent models using rats and mice are most suitable for the investigation of the pathophysiological details. In both models, surgery is performed under anesthesia, followed by assessment of their functional outcome and behavioral testing before brain tissue analysis after euthanasia...
December 2016: Laboratory Animals
https://www.readbyqxmd.com/read/27908839/the-transition-of-acute-postoperative-pain-to-chronic-pain-an-integrative-overview-of-research-on-mechanisms
#2
C Richard Chapman, Charles J Vierck
The nature of the transition from acute to chronic pain still eludes explanation, but chronic pain resulting from surgery provides a natural experiment that invites both clinical epidemiological investigation and basic scientific inquiry into the mechanisms of this transition. The primary purpose of this paper is to review current knowledge and hypotheses on the transition from acute to persistent postsurgical pain, summarizing literature on clinical epidemiological studies of persistent postsurgical pain development, as well as basic neurophysiological studies targeting mechanisms in the periphery, spinal cord, and brain...
November 28, 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27901414/cognitive-deficits-and-inflammatory-response-resulting-from-mild-to-moderate-traumatic-brain-injury-in-rats-are-exacerbated-by-repeated-pre-exposure-to-an-innate-stress-stimulus
#3
Michaël Ogier, Amor Belmeguenai, Thomas Lieutaud, Béatrice Georges, Sandrine Bouvard, Emilie Carré, Frédéric Canini, Laurent Bezin
Traumatic brain injury (TBI) is common in both military and civilian populations, and often results in neurobehavioral sequelae that impair quality of life in both patients and their family. Although individuals who are chronically exposed to stress are more likely to experience TBI, it is still unknown whether pre-injury stress influences the outcome after TBI. The present study tested whether behavioral and cognitive long-term outcome after TBI in rats is affected by prior exposure to an innate stress stimulus...
November 30, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27894339/the-identification-of-human-pituitary-adenoma-initiating-cells
#4
Branavan Manoranjan, Sujeivan Mahendram, Saleh A Almenawer, Chitra Venugopal, Nicole McFarlane, Robin Hallett, Thusyanth Vijayakumar, Almunder Algird, Naresh K Murty, Doron D Sommer, John P Provias, Kesava Reddy, Sheila K Singh
Classified as benign central nervous system (CNS) tumors, pituitary adenomas account for 10% of diagnosed intracranial neoplasms. Although surgery is often curative, patients with invasive macroadenomas continue to experience significant morbidity and are prone to tumor recurrence. Given the identification of human brain tumor-initiating cells (TICs) that initiate and maintain tumor growth while promoting disease progression and relapse in multiple CNS tumors, we investigated whether TICs also drive the growth of human pituitary adenomas...
November 28, 2016: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/27893819/salvianolic-acid-b-alleviates-heart-failure-by-inactivating-erk1-2-gata4-signaling-pathway-after-pressure-overload-in-mice
#5
Juan Yu, Renshan Chen, Yafang Tan, Jiashin Wu, Jianyong Qi, Minzhou Zhang, Weiwang Gu
BACKGROUND: Heart failure(HF) is a dangerous disease that affects millions of patients. Radix Salvia is widely used in Chinese clinics to treat heart diseases. Salvianolic acid B(SalB) is the major active component of Radix Salvia. This study investigated the mechanisms of action and effects of SalB on HF in an experimental mouse model of HF. METHODS: We created a mouse model of HF by inducing pressure overload with transverse aortic constriction(TAC) surgery for 2 weeks and compared among 4 study groups: SHAM group (n = 10), TAC group (n = 9), TAC+MET group (metprolol, positive drug treatment, n = 9) and TAC+SalB group (SalB, 240 mg•kg-1•day-1, n = 9)...
2016: PloS One
https://www.readbyqxmd.com/read/27888520/identifying-the-epileptogenic-zone-in-interictal-resting-state-meg-source-space-networks
#6
Ida A Nissen, Cornelis J Stam, Jaap C Reijneveld, Ilse E C W van Straaten, Eef J Hendriks, Johannes C Baayen, Philip C De Witt Hamer, Sander Idema, Arjan Hillebrand
OBJECTIVE: In one third of patients, seizures remain after epilepsy surgery, meaning that improved preoperative evaluation methods are needed to identify the epileptogenic zone. A potential framework for such a method is network theory, as it can be applied to noninvasive recordings, even in the absence of epileptiform activity. Our aim was to identify the epileptogenic zone on the basis of hub status of local brain areas in interictal magnetoencephalography (MEG) networks. METHODS: Preoperative eyes-closed resting-state MEG recordings were retrospectively analyzed in 22 patients with refractory epilepsy, of whom 14 were seizure-free 1 year after surgery...
November 26, 2016: Epilepsia
https://www.readbyqxmd.com/read/27888341/efficacy-of-the-transtemporal-approach-with-awake-brain-mapping-to-reach-the-dominant-posteromedial-temporal-lesions
#7
Kentaro Iijima, Kazuya Motomura, Lushun Chalise, Masaki Hirano, Atsushi Natsume, Toshihiko Wakabayashi
BACKGROUND: Surgeries for lesions in the dominant hippocampal and parahippocampal gyrus involving the posteromedial temporal regions are challenging to perform because they are located close to Wernicke's area; white matter fibers related with language; the optic radiations; and critical neurovascular structures. We performed a transtemporal approach with awake functional mapping for lesions affecting the dominant posteromedial temporal regions. The aim of this study was to assess the feasibility, safety, and efficacy of awake craniotomy for these lesions...
November 25, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27884107/association-between-changes-in-cerebral-grey-matter-volume-and-postoperative-cognitive-dysfunction-in-elderly-patients-study-protocol-for-a-prospective-observational-cohort-study
#8
Nicolai Goettel, Panagiota Mistridis, Manfred Berres, Julia Reinhardt, Christoph Stippich, Andreas U Monsch, Luzius A Steiner
BACKGROUND: Cognitive decline is frequently observed in elderly patients after major surgery. The pathophysiology of postoperative cognitive dysfunction (POCD) remains unclear. The aim of our investigation is to identify potential associations between brain volume change and POCD in elderly patients undergoing major surgery. METHODS: This is a prospective observational cohort study approved by the regional ethics board. We intend to compare specific brain volumes (hippocampus, lateral ventricle, total grey matter volume, regional cortical thickness) on magnetic resonance imaging and cognitive functions determined by a neuropsychological assessment battery in 70 study participants aged ≥65 years before and 3 and 12 months after major noncardiac surgery...
November 25, 2016: BMC Anesthesiology
https://www.readbyqxmd.com/read/27882019/plasma-bnp-level-combined-with-surgical-apgar-score-to-predict-operative-major-cardiac-adverse-events-in-malignant-obstructive-jaundice-patients
#9
Wei Yu, Changshan Huang, Qian Wang, Erjiang Zhao, Yuechao Ding, Tao Huang, Chao Ma, Bo Meng
OBJECTIVE: To investigate the predictive effect of major adverse cardiac events (MACE) in malignant obstructive jaundice (OJ) patients using plasma brain natriuretic peptide (BNP) level and surgical Apgar scoring (SAS) system. METHODS: Forty one malignant OJ patients undergoing surgical treatments were studied at a single center. Pre-and postoperative plasma BNP level, total bilirubin (TBil) and data of cardiac function (HR, CVP, CI, LVEF%) were detected, the SAS was calculated during the surgery, the relationship of both plasma BNP level and SAS with MACE after surgery was analyzed...
September 2016: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/27876563/preoperative-optimization-of-the-heart-failure-patient-undergoing-cardiac-surgery
#10
REVIEW
Maxime Pichette, Mark Liszkowski, Anique Ducharme
Heart failure patients who undergo cardiac surgery are exposed to significant perioperative complications and high mortality. We herein review the literature concerning preoperative optimization of these patients. Salient findings are that end-organ dysfunction and medication should be optimized before surgery. Specifically: (1) reversible causes of anemia should be treated and a preoperative hemoglobin level of 100 g/L obtained; (2) renal function and volume status should be optimized; (3) liver function must be carefully evaluated; (4) nutritional status should be assessed and cachexia treated to achieve a preoperative albumin level of at least 30 g/L and a body mass index > 20; and (5) medication adjustments performed, such as withholding inhibitors of the renin-angiotensin-aldosterone system before surgery and continuing, but not starting, β-blockers...
August 6, 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/27867917/health-related-quality-of-life-in-brain-tumor-patients-treated-with-surgery-preliminary-result-of-a-single-institution
#11
Chang-Wook Kim, Jin-Deok Joo, Young-Hoon Kim, Jung Ho Han, Chae-Yong Kim
BACKGROUND: Alongside the extent of removal and patients' survival in the management of brain tumors, health-related quality of life (HRQOL) has become an important consideration. The purpose of this study is to evaluate the change of HRQOL in brain tumor patients before and after surgery and to assess the associated factors that contribute to the change of HRQOL. METHODS: A total of 258 patients who underwent surgical treatment were enrolled in this study. The European Organization for Research and Treatment of Cancer Quality of Life Questionnaire 30 (EORTC QLQ-C30) and the 20-item EORTC QLQ-Brain Neoplasm (QLQ-BN20) were used to assess HRQOL...
October 2016: Brain Tumor Research and Treatment
https://www.readbyqxmd.com/read/27860216/somatic-overgrowth-disorders-of-the-pi3k-akt-mtor-pathway-therapeutic-strategies
#12
Kim M Keppler-Noreuil, Victoria E R Parker, Thomas N Darling, Julian A Martinez-Agosto
The phosphatidylinositol-3-kinase (PI3K)/AKT/mTOR signaling pathway plays an essential role in regulation of normal cell growth, metabolism, and survival. Somatic activating mutations in the PI3K/AKT/mTOR pathway are among the most common mutations identified in cancer, and have been shown to cause a spectrum of overgrowth syndromes including PIK3CA-Related Overgrowth Spectrum, Proteus syndrome, and brain overgrowth conditions. Clinical findings in these disorders may be isolated or multiple, including sporadic or mosaic overgrowth (adipose, skeletal, muscle, brain, vascular, or lymphatic), and skin abnormalities (including epidermal nevi, hyper-, and hypopigmented lesions), and have the potential risk of tumorigenesis...
November 18, 2016: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/27858963/resting-state-functional-connectivity-and-cognition-after-major-cardiac-surgery-in-older-adults-without-preoperative-cognitive-impairment-preliminary-findings
#13
Jeffrey N Browndyke, Miles Berger, Todd B Harshbarger, Patrick J Smith, William White, Tiffany L Bisanar, John H Alexander, Jeffrey G Gaca, Kathleen Welsh-Bohmer, Mark F Newman, Joseph P Mathew
OBJECTIVES: To look for changes in intrinsic functional brain connectivity associated with postoperative changes in cognition, a common complication in seniors undergoing major surgery, using resting-state functional magnetic resonance imaging. DESIGN: Objective cognitive testing and functional brain imaging were prospectively performed at preoperative baseline and 6 weeks after surgery and at the same time intervals in nonsurgical controls. SETTING: Academic medical center...
November 17, 2016: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/27858231/how-i-do-it-awake-craniotomy
#14
Ciaran Scott Hill, Flavio Severgnini, Edward McKintosh
BACKGROUND: Awake craniotomy allows continuous assessment of a patient's clinical and neurological status during open brain surgery. This facilitates early detection of interference with eloquent cortex, and hence can allow a surgeon to maximize resection margins without compromising neurological function. METHODS: Awake craniotomy requires an effective scalp blockade, intraoperative assessment, and a carefully co-ordinated theatre team. A variety of clinical and electrophysiological techniques can be used to assess cortical function...
November 17, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27857908/therapeutic-hypothermia-for-increased-intracranial-pressure-after-decompressive-craniectomy-a-single-center-experience
#15
Hyun Taek Rim, Jun Hyong Ahn, Ji Hee Kim, Jae Keun Oh, Joon Ho Song, In Bok Chang
OBJECTIVE: Therapeutic hypothermia (TH) and decompressive craniectomy are neuroprotective interventions following severe brain swelling. The precise benefits, risks, and clinical outcomes in brain swelling after TH are still being investigated. We aimed to investigate the effects of TH in severe brain injury after decompressive craniectomy. METHODS: We reviewed the cases of 24 patients who underwent decompressive craniectomy with intracranial pressure (ICP) monitor insertion in one medical center between January 2012 and May 2016...
October 2016: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/27857815/the-role-of-the-iron-stain-in-assessing-intracranial-hemorrhage
#16
Rudy J Castellani, Gruschenka Mojica, George Perry
The timing of the breakdown of red blood cells and organization of hemorrhage has significance in the catabolism of heme and the processing of iron, but also has a practical application in terms of assigning, or attempting to assign, a time course with respect to traumatic events (e.g. contusions and hemorrhages). Attempts to date contusions, however, have generally been unsuccessful by macroscopic observation, whereas the microscopic observations provide broad data but are also anatomically imprecise as a function of time...
2016: Open Neurology Journal
https://www.readbyqxmd.com/read/27855371/cerebral-mast-cells-participate-in-postoperative-cognitive-dysfunction-by-promoting-astrocyte-activation
#17
Xiang Zhang, Hao Yao, Qingqing Qian, Nana Li, Wenjie Jin, Yanning Qian
BACKGROUND: Astrocytes, the major glial cell type that has been increasingly recognized as contributing to neuroinflammation, are critical in the occurrence and development of postoperative cognitive dysfunction (POCD). Although emerging evidence showed that brain mast cells (MCs) are the "first responders" in neuroinflammation, little is known about the functional communication between MCs and astrocytes. METHODS: In this study, we investigated the potential regulation of astrocyte activation by MCs...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27853892/seizure-onset-zone-localization-from-ictal-high-density-eeg-in-refractory-focal-epilepsy
#18
Willeke Staljanssens, Gregor Strobbe, Roel Van Holen, Gwénaël Birot, Markus Gschwind, Margitta Seeck, Stefaan Vandenberghe, Serge Vulliémoz, Pieter van Mierlo
Epilepsy surgery is the most efficient treatment option for patients with refractory epilepsy. Before surgery, it is of utmost importance to accurately delineate the seizure onset zone (SOZ). Non-invasive EEG is the most used neuroimaging technique to diagnose epilepsy, but it is hard to localize the SOZ from EEG due to its low spatial resolution and because epilepsy is a network disease, with several brain regions becoming active during a seizure. In this work, we propose and validate an approach based on EEG source imaging (ESI) combined with functional connectivity analysis to overcome these problems...
November 16, 2016: Brain Topography
https://www.readbyqxmd.com/read/27847404/neuroprotective-effects-of-bone-marrow-mesenchymal-stem-cells-on-bilateral-common-carotid-arteries-occlusion-model-of-cerebral-ischemia-in-rat
#19
Bagher Pourheydar, Sara Soleimani Asl, Mostafa Azimzadeh, Adel Rezaei Moghadam, Asghar Marzban, Mehdi Mehdizadeh
Cell therapy is the most advanced treatment of the cerebral ischemia, nowadays. Herein, we discuss the neuroprotective effects of bone marrow mesenchymal stem cells (BMSCs) on rat hippocampal cells following intravenous injection of these cells in an ischemia-reperfusion model. Adult male Wistar rats were divided into 5 groups: control, sham (surgery without blockage of common carotid arteries), ischemia (common carotid arteries were blocked for 30 min prior to reperfusion), vehicle (7 days after ischemia PBS was injected via the tail vein), and treatment (injections of BMSC into the tail veins 7 days after ischemia)...
2016: Behavioural Neurology
https://www.readbyqxmd.com/read/27836863/checkpoint-proteins-in-pediatric-brain-and-extracranial-solid-tumors-opportunities-for-immunotherapy
#20
Eric K Ring, James M Markert, G Yancey Gillespie, Gregory K Friedman
Pediatric brain and extracranial solid tumors are a diverse group of malignancies that represent almost half of pediatric cancers. Standard therapy includes various combinations of surgery, cytotoxic chemotherapy and radiation, which can be very harmful to a developing child, and survivors carry a substantial burden of long term morbidities. While these therapies have improved survival rates for children with solid tumors, outcomes still remain extremely poor for subsets of patients. Recently, immunosuppressive checkpoint molecules that negatively regulate immune cell function have been described...
November 10, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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