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https://www.readbyqxmd.com/read/29458187/mri-techniques-to-measure-arterial-and-venous-cerebral-blood-volume
#1
Jun Hua, Peiying Liu, Tae Kim, Manus Donahue, Swati Rane, J Jean Chen, Qin Qin, Seong-Gi Kim
The measurement of cerebral blood volume (CBV) has been the topic of numerous neuroimaging studies. To date, however, most in vivo imaging approaches can only measure CBV summed over all types of blood vessels, including arterial, capillary and venous vessels in the microvasculature (i.e. total CBV or CBVtot). As different types of blood vessels have intrinsically different anatomy, function and physiology, the ability to quantify CBV in different segments of the microvascular tree may furnish information that is not obtainable from CBVtot, and may provide a more sensitive and specific measure for the underlying physiology...
February 16, 2018: NeuroImage
https://www.readbyqxmd.com/read/29458185/tiny-cerebral-aneurysms-can-be-safely-and-effectively-treated-with-lvis-stent-assisted-coiling-or-coiling-alone
#2
Bu-Lang Gao, Tian-Xiao Li, Li Li, Gang-Qin Xu, Bo-Wen Yang
BACKGROUND: The effect and safety of LVIS stent-coiling is currently not known for treating tiny intracranial aneurysms. OBJECTIVE: To investigate the effect and safety of LVIS stent-assisted coiling and coiling alone in treating patients with mostly ruptured tiny aneurysms. METHODS: Seventy-five patients with tiny intracranial aneurysms including 63 ruptured ones were treated endovascularly and analyzed. RESULTS: In the coiling group, complete occlusion was achieved in 35 patients (83...
February 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29458183/age-dependent-attitudes-of-ischemic-patients-towards-disability-after-decompressive-hemicraniectomy-for-malignant-middle-cerebral-artery-infarction
#3
Byoung-Joon Kim, Yeon Ran Hong, Youngmin Han, Yang-Ha Hwang, Boram Ohk, Jaechan Park
OBJECTIVE: To improve the process of surgical informed consent, patient attitudes towards acceptable levels of disability after decompressive surgery for malignant middle cerebral artery infarction are investigated, including the impact of patient age. METHODS: Patients who had experienced a recent minor stroke were asked to complete a questionnaire comprised of 2 parts: 1) demographic information, including patient age, gender, years of education, working status, religion, and economic status and 2) acceptable level of disability based on a modified Rankin Scale (mRS) with corresponding illustrations to explain the mRS levels...
February 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29458114/severity-dependent-influence-of-isocapnic-hypoxia-on-reaction-time-is-independent-of-neurovascular-coupling
#4
Hannah G Caldwell, Geoff B Coombs, Michael M Tymko, Daniela Nowak-Flück, Philip N Ainslie
With exposure to acute normobaric hypoxia, global cerebral oxygen delivery is maintained via increases in cerebral blood flow (CBF); therefore, regional and localized changes in oxygen tension may explain neurocognitive impairment. Neurovascular coupling (NVC) is the close temporal and regional relationship of CBF to changes in neural activity and may aid in explaining the localized CBF response with cognitive activation. High-altitude related cognitive impairment is likely affected by hypocapnic cerebral vasoconstriction that may influence regional CBF regulation independent of hypoxia...
February 16, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29458098/spermine-protects-from-lps-induced-memory-deficit-via-bdnf-and-trkb-activation
#5
Pâmella K Frühauf-Perez, Fernanda R Temp, Micheli M Pillat, Cristiane Signor, Arithane Lorena Wendel, Henning Ulrich, Carlos F Mello, Maribel A Rubin
Lipopolysaccharide (LPS) has been long known to promote neuroinflammation and learning and memory deficits. Since spermine, one of the main natural polyamines in the central nervous system, protects from LPS-induced memory deficit by a mechanism that comprises GluN2B receptors, the aim of the present study was to determine whether brain-derived neurotrophic factor (BDNF), tropomyosin-related kinase B (TrkB) receptor and cAMP response element binding (CREB) are involved in this protective effect of spermine...
February 16, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29458087/ngf-fak-signal-pathway-is-implicated-in-angiogenesis-after-acute-cerebral-ischemia-in-rats
#6
Hai-Ting Zhao, Yu-Hu Zhang, Ying-Hui Zhang, Yue Shen, Yi-Dan Zhang, Fang-Fang Bi, Bo Xiao, Hao Zhang, Wen Ye, Hong-Hai Zhang, Yi-Wei Liao
Neurogenesis in the cerebral infarction after an ischemic event is important to the rehabilitation of patients. However, the mechanism of angiogenesis around cerebral ischemia is not clear. Our study designed to test whether the nerve growth factor (NGF)-P-focal adhesion kinase (FAK) signaling pathway for associations with angiogenesis plays a key role in post-acute cerebral ischemia of rats. Firstly, we implanted the Matrigel, a carrier of basement membrane matrix, into the abdominal skin of rats to identify the relevant components of the NGF-P-FAK signaling pathway related to angiogenesis...
February 16, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29458065/nosocomial-ventriculitis-caused-by-a-meticillin-and-linezolid-resistant-clone-of-staphylococcus-epidermidis-in-neurosurgical-patients
#7
Carlos Rodríguez-Lucas, Javier Fernández, José Antonio Boga, Lucia López-Amor, Lorena Forcelledo, Eva Lázaro-López, M Rosario Rodicio
BACKGROUND: Post-neurosurgical ventriculitis is mainly caused by coagulase-negative staphylococci. The rate of linezolid resistant S. epidermidis (LRSE) is increasing worldwide. AIMS: To report clinical and microbiological data from a series of ventriculitis cases caused by LRSE in a Spanish hospital between 2013 and 2016. METHODS: LRSE ventriculitis cases were retrospectively reviewed in a Spanish hospital during a four-year period. Clinical/epidemiological data of the infected patients were reviewed, the isolates involved were typed by PFGE and MLST, and the molecular basis of linezolid resistance was determined...
February 16, 2018: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29457875/variations-of-the-circle-of-willis-at-the-end-of-the-human-embryonic-period
#8
Kana Furuichi, Aoi Ishikawa, Chigako Uwabe, Haruyuki Makishima, Shigehito Yamada, Tetsuya Takakuwa
Variations of the circle of Willis (CW) influence blood supply to the brain and adjacent structures in adults. We examined the formation of the CW in 20 human embryo samples at the end of the embryonic period using 3-D reconstructions of serial histological sections. The CW was closed in all samples, and did not form in a single plane, but was composed of multiple stair-like planes. The artery acutely curved at the caudal part of the CW, namely at the inlet of the basilar artery and bifurcation of the P1 segment of the posterior cerebral artery (PCA), reflecting flexure of the mesencephalon and diencephalon at this stage...
February 19, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29457851/suppression-of-microrna-144-3p-attenuates-oxygen-glucose-deprivation-reoxygenation-induced-neuronal-injury-by-promoting-brg1-nrf2-are-signaling
#9
Yanru Li, Yongli Zhao, Mingkun Cheng, Yingjie Qiao, Yongtao Wang, Wancheng Xiong, Wei Yue
Accumulating evidence has reported that microRNA-144-3p (miR-144-3p) is highly related to oxidative stress and apoptosis. However, little is known regarding its role in cerebral ischemia/reperfusion-induced neuronal injury. Herein, our results showed that miR-144-3p expression was significantly downregulated in neurons following oxygen-glucose deprivation and reoxygenation (OGD/R) treatment. Overexpression of miR-144-3p markedly reduced cell viability, promoted cell apoptosis, and increased oxidative stress in neurons with OGD/R treatment, whereas downregulation of miR-144-3p protected neurons against OGD/R-induced injury...
February 19, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29457643/performing-under-pressure-hypertension-and-the-regulation-of-cerebral-oxygen-delivery
#10
Ryan L Hoiland
Reductions in arterial oxygen content (CaO2 ) elicit increases in cerebral blood flow (CBF) that are adequate to maintain convective delivery of oxygen to the brain in healthy humans (i.e. cerebral oxygen delivery, CDO2 ). This article is protected by copyright. All rights reserved.
February 19, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29457589/short-term-efficacy-of-pipeline-embolization-device-for-treating-complex-intracranial-aneurysms
#11
NiZaMiDingJiang ReXiaTi, ReXiDan AiKeReMu, KaHeErMan KaDeEr, Yan-Dong Fan, Zhao-Hai Feng, Kai Wang, TeWuErBaTi SuErTanNiYa, Tao-Tao Dou, Hai-Qiang Wu, MaiMaiTiLi AiSha, Xiao-Jiang Cheng
OBJECTIVE: To observe the short-term efficacy of Pipeline embolization divice (PED) for the treatment of complex intracranial aneurysms. METHODS: The clinical data of 29 consecutive patients with 32 intracranial aneurysms treated with PED between April 2015 to September 2016 were analyzed retrospectively. There were 3 small aneurysm, 15 large aneurysms, 8 giant aneurysms, 5 fusiform ayneurysms and 1 recidivation. The vessels include 25 anterior circulation and 4 posterior circulation...
2018: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/29457261/angiography-vs-transesophageal-echocardiography-guided-patent-foramen-ovale-closure-a-propensity-score-matched-analysis-of-a-two-center-registry
#12
Paolo Scacciatella, Ilaria Meynet, Mauro Giorgi, Lorenza M Biava, Ivana Matranga, Luigi Biasco, Pierluigi Omedè, Fulvio Orzan, Fiorenzo Gaita
OBJECTIVES: The purpose of this study is to compare the long-term outcomes of patent foramen ovale (PFO) closure using angiography or transesophageal echocardiography as procedural guidance. BACKGROUND: The interventional treatment is emerging as a safe and efficient option for patients with high likelihood of PFO-related cryptogenic stroke and high risk of recurrence. The "gold-standard" guidance technique remains an issue. METHODS: Two cohorts of patients undergoing PFO closure for cryptogenic stroke in two catheterization laboratories of the same institution, using similar inclusion criteria but different guidance, were compared with propensity score matching...
February 19, 2018: Echocardiography
https://www.readbyqxmd.com/read/29457144/functional-near-infrared-spectroscopy-enabling-routine-functional-brain-imaging
#13
Meryem A Yücel, Juliette J Selb, Theodore J Huppert, Maria Angela Franceschini, David A Boas
Functional Near-Infrared Spectroscopy (fNIRS) maps human brain function by measuring and imaging local changes in hemoglobin concentrations in the brain that arise from the modulation of cerebral blood flow and oxygen metabolism by neural activity. Since its advent over 20 years ago, researchers have exploited and continuously advanced the ability of near infrared light to penetrate through the scalp and skull in order to non-invasively monitor changes in cerebral hemoglobin concentrations that reflect brain activity...
December 2017: Current Opinion in Biomedical Engineering
https://www.readbyqxmd.com/read/29456977/epidemiologic-and-demographic-features-therapeutic-intervention-and-prognosis-of-the-patients-with-cerebral-aneurysm
#14
Masih Sabouri, Amir Mahabadi, Homayoun Tabesh, Majeed Rezvani, Masih Kouchekzadeh, Ali Namazi
Background: Cerebral aneurysms are a kind of cardiovascular diseases which are accompanied with high morbidity and mortality due to rupturing and causing subarachnoid hemorrhages. The current study aimed to determine epidemiologic and demographic features and prognosis of patients with cerebral aneurysms. Materials and Methods: In this cross-sectional study, 465 patients with cerebral aneurysms hospitalized in Al-Zahra Hospital were studied. The required information including demographic, epidemiologic, and clinical features of the disease were extracted from their records...
2018: Advanced Biomedical Research
https://www.readbyqxmd.com/read/29456901/awake-craniotomy-for-the-treatment-of-a-cortical-pseudoaneurysm-in-a-pregnant-patient
#15
Hirad Hedayat, Daniel R Felbaum, John E Reynolds, Rashid M Janjua
Neurosurgical pathologies presenting during pregnancy are uncommon. If present, the situation creates a unique diagnostic, observational, and therapeutic challenge as both lives are placed at potential risk. Surgical procedures during pregnancy are approached carefully as physiological stressors associated with surgery and anesthesia may cause fetal or maternal compromise. We present the only known case of a pseudoaneurysm treated with an awake craniotomy, allowing us to abate the risks associated with general anesthesia in pregnancy...
December 7, 2017: Curēus
https://www.readbyqxmd.com/read/29456649/protective-effect-of-miconazole-on-rat-myelin-sheaths-following-premature-infant-cerebral-white-matter-injury
#16
Xuewen Su, Wenyan Tang, Zuo Luan, Yinxiang Yang, Zhaoyan Wang, Yu Zhang, Qian Wang, Lei Suo, Zhen Huang, Xiue Wang, Haifeng Yuan
The aim of the present study was to investigate the protective effects of miconazole on myelin sheaths following cerebral white matter damage (WMD) in premature infant rats. Sprague Dawley rats (3-days-old) were randomly divided into four groups (n=30 each) as follows: Sham surgery group, WMD model group, 10 mg/kg/day treatment group and 40 mg/kg/day treatment group. A cerebral white matter lesion model was created by ligating the right common carotid artery for 80 min. Treatment groups were administered with 10 or 40 mg/kg miconazole at 4-8 days following birth (early treatment group) or 5-11 days following birth (late treatment group)...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456646/an-experimental-rabbit-model-of-symptomatic-cerebral-vasospasm-with-in-vivo-neuroimaging-assessment-and-ex-vivo-histological-validation
#17
Yunchang Mo, Luping Huang, Linbi Chen, Michael Veronesi, Yiyi Shi, Sijia Chen, Linli Peng, Leping Zhou, Yonglin Pu, Junlu Wang
Cerebral vasospasm (CVS) is a severe complication that occurs following aneurysmal subarachnoid hemorrhage (SAH). Magnetic resonance angiography (MRA) has been used to evaluate brain injury following SAH in humans. The present study was designed to assess a rabbit model of symptomatic CVS (SCVS) and the utility of MRA in evaluating SCVS in rabbits. Japanese white rabbits (n=24) were randomly divided into 2 equal groups: A sham group and a SAH group. Neurological scores were evaluated for 7 days following SAH...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456504/a-review-on-central-nervous-system-effects-of-gastrodin
#18
REVIEW
Yuan Liu, Jialiang Gao, Min Peng, Hongyan Meng, Hongbo Ma, Pingping Cai, Yuan Xu, Qiong Zhao, Guomin Si
Rhizoma Gastrodiae (also known as Tian ma ), the dried rhizome of Gastrodia elata Blume, is a famous Chinese herb that has been traditionally used for the treatment of headache, dizziness, spasm, epilepsy, stoke, amnesia and other disorders for centuries. Gastrodin, a phenolic glycoside, is the main bioactive constituent of Rhizoma Gastrodiae . Since identified in 1978, gastrodin has been extensively investigated on its pharmacological properties. In this article, we reviewed the central nervous system (CNS) effects of gastrodin in preclinical models of CNS disorders including epilepsy, Alzheimer's disease, Parkinson's disease, affective disorders, cerebral ischemia/reperfusion, cognitive impairment as well as the underlying mechanisms involved and, where possible, clinical data that support the pharmacological activities...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29456491/synaptic-e-i-balance-underlies-efficient-neural-coding
#19
REVIEW
Shanglin Zhou, Yuguo Yu
Both theoretical and experimental evidence indicate that synaptic excitation and inhibition in the cerebral cortex are well-balanced during the resting state and sensory processing. Here, we briefly summarize the evidence for how neural circuits are adjusted to achieve this balance. Then, we discuss how such excitatory and inhibitory balance shapes stimulus representation and information propagation, two basic functions of neural coding. We also point out the benefit of adopting such a balance during neural coding...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29456400/unilateral-transient-watershed-cerebral-infarct-in-a-6-year-old-girl-with-frequently-relapsing-nephrotic-syndrome
#20
Kapil Bhalla, Deepali Garg, Mahima Rajan, Jaya Shankar Kaushik, Geeta Gathwala
Nephrotic syndrome is a prothrombotic state with predisposition to venous sinus thrombosis and arterial vascular stroke. Watershed infarcts in junction of arterial territory develop in hypotensive hypovolemic state. These border zone infarcts are usually bilateral in the absence of unilateral arterial stenosis or microembolism. We report a 6-year-girl of frequently relapsing nephrotic syndrome who developed sudden onset hemiparesis with aphasia. Magnetic resonance (MR) imaging brain revealed unilateral watershed infarct in territory between the major cerebral arterial vessels with evidence of restricted diffusion and normal vessel anatomy on MR angiography...
January 2018: Journal of Natural Science, Biology, and Medicine
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