keyword
MENU ▼
Read by QxMD icon Read
search

fourth ventricle

keyword
https://www.readbyqxmd.com/read/28333388/central-regulation-of-glucose-homeostasis
#1
Alexander Tups, Jonas Benzler, Domenico Sergi, Sharon R Ladyman, Lynda M Williams
The ability of the brain to directly control glucose levels in the blood independently of its effects on food intake and body weight has been known ever since 1854 when Claude Bernard, a French physiologist, discovered that lesioning the floor of the fourth ventricle in rabbits led to a rise of sugar in the blood. Despite this outstanding discovery at that time, it took more than 140 years before progress started to be made in identifying the underlying mechanisms of brain-mediated control of glucose homeostasis...
March 16, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28325888/factors-associated-with-clinical-outcomes-in-patients-with-primary-intraventricular-hemorrhage
#2
Sang-Hoon Lee, Kyung-Jae Park, Dong-Hyuk Park, Shin-Hyuk Kang, Jung-Yul Park, Yong-Gu Chung
BACKGROUND Primary intraventricular hemorrhage (PIVH) is an uncommon type of intracerebral hemorrhage. Owing to its rarity, the clinical and radiological factors affecting outcomes in patients with PIVH have not been widely studied. MATERIAL AND METHODS We retrospectively reviewed 112 patients (mean age 53 years) treated for PIVH at our institution from January 2004 to December 2014. Clinical and radiological parameters were analyzed 3 months after initial presentation to identify factors associated with clinical outcomes, as assessed by the Glasgow Outcome Scale (favorable ≥4, unfavorable <4)...
March 22, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28323179/risk-factors-for-poor-outcome-in-hypertensive-intraventricular-haemorrhage-treated-by-external-ventricular-drainage-with-intraventricular-fibrinolysis
#3
Chuhua Fu, Lijun Liu, Bo Chen, Ning Wang, Zhibin Tan, Huayun Chen, Xiao Liu, Yanwei Dang
OBJECTIVE: External ventricular drainage (EVD) combined with intraventricular fibrinolysis (IVF) is a commonly accepted surgical approach for some cases of hypertensive intraventricular haemorrhage (HIVH). We aimed to investigate the association between preoperative factors and outcome in patients with HIVH treated by EVD plus IVF. METHODS: Records from March 2010 to March 2016 were searched for HIVH treated by EVD plus IVF. We divided this population into the favourable outcome group and the unfavourable outcome group according to the Glasgow Outcome Scale (GOS)...
March 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28322837/role-of-prostanoid-ep3-1-receptors-in-mechanisms-of-emesis-and-defaecation-in-ferrets
#4
Kelvin K W Kan, Man K Wai, Robert L Jones, John A Rudd
Prostanoid EP receptor agonists are used for a number of clinical indications but may be associated with gastric disturbance. In the present studies we used the ferret and sulprostone (30µg/kg, i.p.) to investigate the role of EP3/1 receptors in mechanisms of emesis and defaecation. The emetic response was antagonized significantly by (+)-(2S,3S)-3-(2-methoxybenzylamino)-2-phenlypiperidine hydrochloride (CP-99,994; 10mg/kg, i.p.; P<0.05), but not by metoclopramide (0.3 and 3mg/kg), ondansetron (0.1 and 1mg/kg), or scopolamine (3mg/kg); promethazine (3mg/kg) potentiated emesis by approximately 82% (P<0...
March 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28315866/cerebrospinal-fluid-and-parenchymal-brain-development-and-growth-in-the-healthy-fetus
#5
Nickie N Andescavage, Adre DuPlessis, Robert McCarter, Gilbert Vezina, Richard Robertson, Catherine Limperopoulos
OBJECTIVE: The objective of this study was to apply quantitative magnetic resonance imaging to characterize absolute cerebrospinal fluid (CSF) development, as well as its relative development to fetal brain parenchyma in the healthy human fetus. DESIGN: We created three-dimensional high-resolution reconstructions of the developing brain for healthy fetuses between 18 and 40 weeks' gestation, segmented the parenchymal and CSF spaces, and calculated the volumes for the lateral, third, and fourth ventricles; extra-axial CSF space; and the cerebrum, cerebellum, and brainstem...
March 18, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28296378/-type-i-chiari-malformation-associated-with-cerebellar-atrophy-case-report
#6
Luis Rafael Moscote-Salazar, Willem Guillermo Calderón-Miranda, Hernando Raphael Alvis-Miranda, Ángel Lee-Aguirre, Gabriel Alcalá-Cerra
Chiari malformation is characterized by caudal displacement of the cerebellar tonsils that penetrate into the spinal canal through the foramen magnum, achieving reach the atlas or axis. trunk and any drop of the fourth ventricle is observed. Typically is seen in young adults. In some cases scoliosis and Syringomyelic cavities may occur. The authors present (as far as they know) the first case in the literature with long term follow-up, of a caucasian woman with an unusual form of cerebellar atrophy and Chiari Type I malformation, suffering from weakness in his upper and lower extremities with rapidly progression...
March 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28291422/comparison-of-posterior-fossa-volumes-and-clinical-outcomes-after-decompression-of-chiari-malformation-type-i
#7
Siri Sahib S Khalsa, Alan Siu, Tiffani A DeFreitas, Justin M Cappuzzo, John S Myseros, Suresh N Magge, Chima O Oluigbo, Robert F Keating
OBJECTIVE Previous studies have indicated an association of Chiari malformation Type I (CM-I) and a small posterior fossa. Most of these studies have been limited by 2D quantitative methods, and more recent studies utilizing 3D methodologies are time-intensive with manual segmentation. The authors sought to develop a more automated tool to calculate the 3D posterior fossa volume, and correlate its changes after decompression with surgical outcomes. METHODS A semiautomated segmentation program was developed, and used to compare the pre- and postoperative volumes of the posterior cranial fossa (PCF) and the CSF spaces (cisterna magna, prepontine cistern, and fourth ventricle) in a cohort of pediatric patients with CM-I...
February 17, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28280470/acute-effect-of-central-administration-of-urotensin-ii-on-baroreflex-and-blood-pressure-in-conscious-normotensive-rabbits
#8
Kyungjoon Lim, Yusuke Sata, Kristy L Jackson, Sandra L Burke, Geoffrey A Head
In the present study, we examined the effects of central administration of Urotensin II on blood pressure, heart rate, and baroreceptor heart rate reflexes in conscious normotensive rabbits. Preliminary operations were undertaken to implant a balloon cuff on the inferior vena cava for baroreflex assessments and to implant cannula into the lateral and fourth ventricle. After 2 weeks of recovery cumulative dose response curves to Urotensin II (10, 100 ng, 1, 10, and 100 μg) given into the ventricles, or Ringer's solution as a vehicle were performed on separate days...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28264582/a-new-shunt-for-obstructive-hydrocephalus-ventricle-sylvian-fissure-shunt-a-preliminary-report
#9
Sushil Patkar
Cerbrospinal fluid (CSF) pathway studies have revealed that after egressing from the fourth ventricle reaches the basal supra sellar cistern and ultimately the sylvian cisterns from where the CSF travels over the cerebral convexity subarachnoid space to reach the superior saggital sinus and enters the blood stream. Diverting CSF from the lateral ventricle with a shunt catheter to the sylvian cistern can be an option to treat obstructive hydrocephalus. 2 patients underwent this procedure of diverting CSF from the lateral ventricle with a shunt catheter (Chabbra, India) to the sylvian cistern successfully and had immediate relief of symptoms of raised intracranial pressure...
March 6, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28254208/molecular-cytogenetic-characterization-of-jacobsen-syndrome-11q23-3-q25-deletion-in-a-fetus-associated-with-double-outlet-right-ventricle-hypoplastic-left-heart-syndrome-and-ductus-venosus-agenesis-on-prenatal-ultrasound
#10
Chih-Ping Chen, Liang-Kai Wang, Pei-Chen Wu, Tung-Yao Chang, Schu-Rern Chern, Peih-Shan Wu, Yen-Ni Chen, Shin-Wen Chen, Chen-Chi Lee, Chien-Wen Yang, Wayseen Wang
OBJECTIVE: We present molecular cytogenetic characterization of Jacobsen syndrome (11q23.3-q25 deletion) in a fetus associated with double outlet right ventricle (DORV), hypoplastic left heart syndrome (HLHS), and ductus venosus (DV) agenesis on prenatal ultrasound. CASE REPORT: A 26-year-old woman underwent prenatal ultrasound examination at 22 weeks of gestation, which revealed intrauterine growth restriction, short femurs, DORV, HLHS, DV agenesis, single umbilical artery, and curly fourth toe of the left foot...
February 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28244335/linear-relationship-found-by-magnetic-resonance-imaging-between-cerebrospinal-fluid-volume-and-body-weight-in-dogs
#11
László Z Reinitz, Gábor Bajzik, Rita Garamvölgyi, Bianka Benedek, Örs Petneházy, András Lassó, Zsolt Abonyi-Tóth, Borbála Lőrincz, Péter Sótonyi
Despite numerous studies on cerebrospinal fluid (CSF) and its importance during hydrocephalus or myelography, no reliable values exist about its overall volume in dogs. In this study, our aim was to measure the intracranial (IC) volume of CSF in dogs and assess its possible relationship with body size and the symmetry of the lateral ventricles. We ran a 3D magnetic resonance imaging (MRI) sequence on the central nervous system of 12 healthy, male mongrel dogs between 3-5 years of age and 7.5-35.0 kg body weight...
March 2017: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/28238866/the-distribution-of-nicotinamide-adenine-dinucleotide-phosphate-diaphorase-nadph-d-in-the-medulla-oblongata-spinal-cord-cranial-and-spinal-nerves-of-frog-microhyla-ornata
#12
Arun G Jadhao, Saikat P Biswas, Rahul C Bhoyar, Claudia Pinelli
Nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d) enzymatic activity has been reported in few amphibian species. In this study, we report its unusual localization in the medulla oblongata, spinal cord, cranial nerves, spinal nerves, and ganglions of the frog, Microhyla ornata. In the rhombencephalon, at the level of facial and vagus nerves, the NADPH-d labeling was noted in the nucleus of the abducent and facial nerves, dorsal nucleus of the vestibulocochlear nerve, the nucleus of hypoglossus nerve, dorsal and lateral column nucleus, the nucleus of the solitary tract, the dorsal field of spinal grey, the lateral and medial motor fields of spinal grey and radix ventralis and dorsalis (2-10)...
February 24, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28236314/non-visualization-of-choroid-plexus-of-the-fourth-ventricle-as-a-first-trimester-predictor-of-posterior-fossa-anomalies-and-chromosomal-defects-a-three-dimensional-ultrasound-study
#13
P Martinez-Ten, T Illescas, B Adiego, M Estevez, C Bermejo, A E Wong, W Sepulveda
OBJECTIVE: To assess non-visualization of the choroid plexus of the fourth ventricle (CP-IVV) as a simple, qualitative, and reproducible first-trimester ultrasound feature of the posterior fossa that predicts brain anomalies and chromosomal defects. METHODS: Three-dimensional (3D) ultrasound datasets of the fetal brain were prospectively obtained from 65 consecutive singleton, normal first-trimester fetuses and retrospectively from 27 fetuses identified as having an abnormal fetal posterior fossa on the first-trimester scan, which were randomly included in the final study group...
February 25, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28217393/rare-association-of-secondary-superficial-siderosis-caused-by-a-fourth-ventricle-hemorrhagic-ependymoma-mimicking-a-cavernoma-case-report-and-literature-review
#14
Eduardo E Espinosa Rodríguez, Rodrigo Carrasco Moro, Juan S Martínez San Millán, Héctor G Pian Arias
BACKGROUND: The association of a hemorrhagic tumor with secondary superficial siderosis (SS) is a relatively rare although well described phenomenon. CASE DESCRIPTION: We present the case report of a 35-year-old male with a history of drowsiness, hypoacusia, drop attacks, and multidirectional nystagmus during the last 2 months, who presented with acute obstructive hydrocephalus caused by a fourth ventricle mass displaying radiological signs of repeated intra and extratumoral hemorrhage with SS...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28209310/paradoxical-ventriculomegaly-due-to-low-pressure-hydrocephalus-a-rare-complication-of-the-treatment-of-a-trapped-fourth-ventricle-case-report
#15
Neelan J Marianayagam, Netanel Ben Shalom, Saeed Yassin, Shalom Michowiz, Sagi Harnof, Gustavo Rajz
In this paper, we describe the rare phenomena of descending transtentorial herniation and paradoxical ventriculomegaly due to low pressure hydrocephalus. This resulted as a complication of treatment in a 14year old male patient, who had undergone multiple ventriculo-peritoneal shunt placements for hydrocephalus after resection of pilocytic astrocytoma. We discuss the etiology of this rare complication and our strategy for treatment. We emphasize the need for strategic placement of programmable shunts to avoid over shunting and associated complications such as tentorial herniation...
February 10, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28193110/pontine-tegmental-cap-dysplasia-in-an-extremely-preterm-infant-and-review-of-the-literature
#16
Sylvie Picker-Minh, Sebastian Hartenstein, Hans Proquitté, Sebastian Fröhler, Vera Raile, Nadine Kraemer, Sarah Apeshiotis, Michael Leipoldt, Karim D Kalache, Deborah Morris-Rosendahl, Eugen Boltshauser, Wei Chen, Angela M Kaindl
Pontine tegmental cap dysplasia is a rare hindbrain malformation syndrome with a hypoplastic pons, a tissue protrusion into the fourth ventricle, and cranial nerve dysfunction. We here report clinical, imaging, and genetic findings of the first extremely low-birth-weight preterm infant with pontine tegmental cap dysplasia born at 25 weeks of gestation and provide an overview of 29 sporadic cases. A prenatally diagnosed hypoplastic and rostrally shifted cerebellum was indicative of a hindbrain defect and later identified as an early sign of pontine tegmental cap dysplasia in our patient...
March 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28184993/pathogenic-implications-of-cerebrospinal-fluid-barrier-pathology-in-neuromyelitis-optica
#17
Yong Guo, Stephen D Weigand, Bogdan F Popescu, Vanda A Lennon, Joseph E Parisi, Sean J Pittock, Natalie E Parks, Stacey L Clardy, Charles L Howe, Claudia F Lucchinetti
Pathogenic autoantibodies associated with neuromyelitis optica (NMO) induce disease by targeting aquaporin-4 (AQP4) water channels enriched on astrocytic endfeet at blood-brain interfaces. AQP4 is also expressed at cerebrospinal fluid (CSF)-brain interfaces, such as the pial glia limitans and the ependyma and at the choroid plexus blood-CSF barrier. However, little is known regarding pathology at these sites in NMO. Therefore, we evaluated AQP4 expression, microglial reactivity, and complement deposition at pial and ependymal surfaces and in the fourth ventricle choroid plexus in 23 autopsy cases with clinically and/or pathologically confirmed NMO or NMO spectrum disorder...
April 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28183840/imaging-characteristics-of-pediatric-diffuse-midline-gliomas-with-histone-h3-k27m-mutation
#18
M S Aboian, D A Solomon, E Felton, M C Mabray, J E Villanueva-Meyer, S Mueller, S Cha
BACKGROUND AND PURPOSE: The 2016 World Health Organization Classification of Tumors of the Central Nervous System includes "diffuse midline glioma with histone H3 K27M mutation" as a new diagnostic entity. We describe the MR imaging characteristics of this new tumor entity in pediatric patients. MATERIALS AND METHODS: We retrospectively reviewed imaging features of pediatric patients with midline gliomas with or without the histone H3 K27 mutation. We evaluated the imaging features of these tumors on the basis of location, enhancement pattern, and necrosis...
February 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28177105/the-circumventricular-organs
#19
REVIEW
Charanjit Kaur, Eng-Ang Ling
The circumventricular organs (CVOs) are midline structures located around the third and fourth ventricles that are characterized by a lack of blood-brain barrier. The pineal gland, median eminence, neurohypophysis and the subcommisural organ are classified as secretory, whereas the subfornical organ, area postrema and the organum vasculosum of the lamina terminalis as the sensory CVOs. Glial cells consisting of astrocytes and microglia/macrophages are present in all these organs. The pineal gland, neurohypophysis and the median eminence lack the presence of neurons that are present in the rest of the circumventricular organs...
February 8, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28176389/imaging-diagnosis-antemortem-detection-of-oligodendroglioma-cerebrospinal-fluid-drop-metastases-in-a-dog-by-serial-magnetic-resonance-imaging
#20
Mariana Vigeral, R Timothy Bentley, Nicholas J Rancilio, Margaret A Miller, Hock Gan Heng
An English Bulldog underwent radiation therapy of an intracranial, left lateral ventricle mass. Following resolution of the primary mass, an intraventricular fourth ventricle lesion developed. Subsequently, multiple lesions developed from the cervical central canal and leptomeninges. Serial magnetic resonance imaging documented the propagation of lesions along the cerebrospinal fluid (CSF) pathways, known as "CSF drop metastasis." Histopathology confirmed multifocal intraventricular and leptomeningeal oligodendroglioma...
February 7, 2017: Veterinary Radiology & Ultrasound
keyword
keyword
104528
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"