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https://www.readbyqxmd.com/read/29149393/challenges-in-minor-tbi-and-indications-for-head-ct-in-pediatric-tbi-an-update
#1
Navneet Singh, Ash Singhal
INTRODUCTION: Pediatric head trauma is one of the commonest presentations to emergency departments. Over 90% of such head injuries are considered mild, but still present risk acute clinical deterioration and longer term morbidity. Identifying which children are at risk of clinically important brain injuries remains challenging and much of the data on minor head injuries is based on the adult population. CHALLENGES IN PEDIATRICS: Children, however, are different, both anatomically and in terms of mechanism of injury, to adults and, even within the pediatric group, there are differences with age and stage of development...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29149391/decompressive-craniectomy-for-traumatic-intracranial-hypertension-application-in-children
#2
Adam M H Young, Angelos G Kolias, Peter J Hutchinson
Traumatic brain injury remains prevalent in children, particularly within the adolescent age group. In severe injury, the priority of treatment is to stabilise the patient initially and prevent the evolution of brain swelling and secondary ischaemia using tiers of medical therapy. The final stage of intervention for such patients is a decompressive craniectomy. Here in, we identify the current evidence for performing decompressive crainectomy in children including the results from the RESCUEicp study.
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29149249/human-accelerated-regions-and-other-human-specific-sequence-variations-in-the-context-of-evolution-and-their-relevance-for-brain-development
#3
Anastasia Levchenko, Alexander Kanapin, Anastasia Samsonova, Raul Gainetdinov
The review discusses, in a format of a timeline, the studies of different types of genetic variants, present in Homo sapiens, but absent in all other primate, mammalian or vertebrate species, tested so far. The main characteristic of these variants is that they are found in regions of high evolutionary conservation. These sequence variations include single nucleotide substitutions (called human accelerated regions), deletions and segmental duplications. The rationale for finding such variations in the human genome is that they could be responsible for traits, specific to our species, of which the human brain is the most remarkable...
November 14, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29148040/the-endocranial-shape-of-australopithecus-africanus-surface-analysis-of-the-endocasts-of-sts-5-and-sts-60
#4
Amélie Beaudet, Jean Dumoncel, Frikkie de Beer, Stanley Durrleman, Emmanuel Gilissen, Anna Oettlé, Gérard Subsol, John Francis Thackeray, José Braga
Assessment of global endocranial morphology and regional neuroanatomical changes in early hominins is critical for the reconstruction of evolutionary trajectories of cerebral regions in the human lineage. Early evidence of cortical reorganization in specific local areas (e.g. visual cortex, inferior frontal gyrus) is perceptible in the non-human South African hominin fossil record. However, to date, little information is available regarding potential global changes in the early hominin brain. The introduction of non-invasive imaging techniques opens up new perspectives for the study of hominin brain evolution...
November 16, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29145189/rem-sleep-behavior-disorder
#5
Claudio L Bassetti, Panagiotis Bargiotas
Rapid eye movement sleep behavior disorder (RBD) is a brain disorder, characterized by the dream enactment during rapid eye movement (REM) sleep due to a lack of physiologic muscle atonia and increased muscle twitching. Schenk was the first to describe this disorder in 1986; however, few authors reported in the 1970-1980s loss of physiological muscle atonia combined with dream enactment in the course of brainstem disorders and as a consequence of alcoholism and antidepressant treatment. RBD affects less than 1% of the adult population, but can be found in up to 25-50% of neurodegenerative disorders including Parkinson's disease, multisystem atrophy, and dementia with Lewy body...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29142146/inflammatory-natalizumab-associated-pml-baseline-characteristics-lesion-evolution-and-relation-with-pml-iris
#6
Mike P Wattjes, Martijn T Wijburg, Jeroen van Eijk, Stephan Frequin, Bernard M J Uitdehaag, Frederik Barkhof, Clemens Warnke, Joep Killestein
BACKGROUND AND OBJECTIVE: Natalizumab-associated progressive multifocal leukoencephalopathy (NTZ-PML) patients may show imaging signs suggestive of inflammation at diagnosis ('inflammatory PML'), reminiscent of PML-immune reconstitution inflammatory syndrome (PML-IRIS). We investigated the imaging characteristics of inflammatory NTZ-PML lesions and PML-IRIS to determine differentiating and overlapping features. METHODS: We scored the presence, localisation and pattern of imaging characteristics of inflammation on brain MRI scans of inflammatory NTZ-PML patients...
November 15, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29142114/female-vervet-monkeys-fine-tune-decisions-on-tolerance-versus-conflict-in-a-communication-network
#7
Christèle Borgeaud, Alessandra Schnider, Michael Krützen, Redouan Bshary
Group living promotes opportunities for both cooperation and competition. Selection on the ability to cope with such opposing social opportunities has been proposed as a driving force in the evolution of large brains in primates and other social species. However, we still know little about the degree of complexity involved in such social strategies. Here, we report advanced social strategies in wild vervet monkeys. Building on recent experimental evidence that subordinate females trade grooming for tolerance from higher-ranking individuals during foraging activities, we show that the audience composition strongly affects this trade...
November 29, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29139543/molecular-cloning-and-expression-analysis-of-sox3-during-gonad-and-embryonic-development-in-misgurnus-anguillicaudatus
#8
Xiaohua Xia, Weiran Huo, Ruyan Wan, Linxia Zhang, Xiaopei Xia, Zhongjie Chang
Sox3 is a single-exon gene located on the X chromosome in most vertebrates. It belongs to the SoxB1 subfamily, which is part of the larger Sox family. Previous studies have revealed that Sox3 is expressed in many fish species. However, how Sox3 influences the development of Misgurnus anguillicaudatus remains unknown. In this study, a Sox3 homologue, termed MaSox3, was cloned from the brain of M. anguillicaudatus using homology-based cloning and the rapid amplification of cDNA ends method. Sequence analysis reveals that MaSox3 encodes a hydrophilic protein, which contains a characteristic HMG-box DNA-binding domain of 79 amino acids, and shares high homology with Sox3 in other species...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/29139535/contribution-of-cranial-neural-crest-cells-to-mouse-skull-development
#9
Taofen Wu, Guiqian Chen, Fei Tian, Hong-Xiang Liu
The mammalian skull vault is a highly regulated structure that evolutionally protects brain growth during vertebrate development. It consists of several membrane bones with different tissue origins (e.g. neural crest-derived frontal bone and mesoderm-derived parietal bone). Although membrane bones are formed through intramembranous ossification, the neural crest-derived frontal bone has superior capabilities for osteoblast activities and bone regeneration via TGF, BMP, Wnt, and FGF signaling pathways. Neural crest (NC) cells are multipotent, and once induced, will follow specific paths to migrate to different locations of the body where they give rise to a diverse array of cell types and tissues...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/29138746/a-novel-encephalopathy-in-a-thiamine-deficient-dog-resembling-human-wernicke-s-disease-with-atypical-mri-pattern
#10
Floriana Gernone, Mario Ricciardi
Thiamine is a water-soluble vitamin, which participates in several vital metabolic pathways involved in energy metabolism and neurotransmitter synthesis of mammals. In companion animals thiamine deficiency is classically associated with signs of diffuse encephalopathy and lesions on brainstem nuclei and mesencephalic colliculi evident on magnetic resonance imaging. This paper describes a novel clinical presentation in a thiamine-deficient dog showing multifocal, central and peripheral nervous and cardiovascular system alterations...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/29138289/the-evolution-of-cortical-development-the-synapsid-diapsid-divergence
#11
REVIEW
Andre M Goffinet
The cerebral cortex covers the rostral part of the brain and, in higher mammals and particularly humans, plays a key role in cognition and consciousness. It is populated with neuronal cell bodies distributed in radially organized layers. Understanding the common and lineage-specific molecular mechanisms that orchestrate cortical development and evolution are key issues in neurobiology. During evolution, the cortex appeared in stem amniotes and evolved divergently in two main branches of the phylogenetic tree: the synapsids (which led to present day mammals) and the diapsids (reptiles and birds)...
November 15, 2017: Development
https://www.readbyqxmd.com/read/29136611/gut-microbiota-in-health-and-disease
#12
Yuichiro Yamashiro
Intestinal regulatory T (Treg) cells are critical to maintaining immune tolerance to dietary antigens and gut microbiota. This paper reviews several papers on this topic that were recently published by Japanese researchers. Specifically, Prof. K. Honda and his group have found that commensal microbiota capable of metabolizing butyrate induces the differentiation of colonic Treg cells. In a separate work, Prof. Y. Yokoyama and his group used a novel, culture-independent analytical method (the Yakult Intestinal Flora-Scan) for detection of bacteria in the bloodstream...
November 14, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/29136119/the-bat-as-a-new-model-of-cortical-development
#13
Verónica Martínez-Cerdeño, Jasmin Camacho, Jeanelle Ariza, Hailee Rogers, Kayla Horton-Sparks, Anna Kreutz, Richard Behringer, John J Rasweiler, Stephen C Noctor
The organization of the mammalian cerebral cortex shares fundamental features across species. However, while the radial thickness of grey matter varies within one order of magnitude, the tangential spread of the cortical sheet varies by orders of magnitude across species. A broader sample of model species may provide additional clues for understanding mechanisms that drive cortical expansion. Here, we introduce the bat Carollia perspicillata as a new model species. The brain of C. perspicillata is similar in size to that of mouse but has a cortical neurogenic period at least 5 times longer than mouse, and nearly as long as that of the rhesus macaque, whose brain is 100 times larger...
November 9, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29132765/cortical-thinning-correlates-of-changes-in-visuospatial-and-visuoperceptual-performance-in-parkinson-s-disease-a-4-year-follow-up
#14
A I Garcia-Diaz, B Segura, H C Baggio, C Uribe, A Campabadal, A Abos, M J Marti, F Valldeoriola, Y Compta, N Bargallo, C Junque
BACKGROUND: Growing evidence highlights the relevance of posterior cortically-based cognitive deficits in Parkinson's disease (PD) as possible biomarkers of the evolution to dementia. Cross-sectional correlational studies have established a relationship between the degree of atrophy in posterior brain regions and visuospatial and visuoperceptual (VS/VP) impairment. The aim of this study is to address the progressive cortical thinning correlates of VS/VP performance in PD. METHODS: Forty-four PD patients and 20 matched healthy subjects were included in this study and followed for 4 years...
November 7, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29132545/nanoformulation-a-useful-therapeutic-strategy-for-improving-neuroprotection-and-the-neurorestorative-potential-in-experimental-models-of-parkinson-s-disease
#15
Jose V Lafuente, Catalina Requejo, Alejandro Carrasco, Harkaitz Bengoetxea
Parkinson's disease (PD) is the second most frequent neurodegenerative disorder, but current therapies are only symptomatic. Experimental models are necessary to go deeper in the comprehension of pathophysiological mechanism and to assess new therapeutic strategies. The unilateral 6-hydroxydopamine (6-OHDA) lesion either in medial forebrain bundle (MFB) or into the striatum in rats affords to study various stages of PD depending on the evolution time lapsed. A promising alternative to address the neurodegenerative process is the use of neurotrophic factors; but its clinical use has been limited due to its short half-life and rapid degradation after in vivo administration, along with difficulties for crossing the blood-brain barrier (BBB)...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/29132503/gyrification-of-the-cerebral-cortex-requires-fgf-signaling-in-the-mammalian-brain
#16
Naoyuki Matsumoto, Yohei Shinmyo, Yoshie Ichikawa, Hiroshi Kawasaki
Although it has been believed that the evolution of cortical folds was a milestone, allowing for an increase in the number of neurons in the cerebral cortex, the mechanisms underlying the formation of cortical folds are largely unknown. Here we show regional differences in the expression of fibroblast growth factor receptors (FGFRs) in the developing cerebral cortex of ferrets even before cortical folds are formed. By taking the advantage of our in utero electroporation technique for ferrets, we found that cortical folding was impaired in the ferret cerebral cortex when FGF signaling was inhibited...
November 14, 2017: ELife
https://www.readbyqxmd.com/read/29130981/endocranial-casts-of-pre-mammalian-therapsids-reveal-an-unexpected-neurological-diversity-at-the-deep-evolutionary-root-of-mammals
#17
Julien Benoit, Vincent Fernandez, Paul R Manger, Bruce S Rubidge
The origin and evolution of the mammalian brain has long been the focus of scientific enquiry. Conversely, little research has focused on the palaeoneurology of the stem group of Mammaliaformes, the Permian and Triassic non-mammaliaform Therapsida (NMT). This is because the majority of the NMT have a non-ossified braincase, making the study of their endocranial cast (sometimes called the "fossil brain") problematic. Thus, descriptions of the morphology and size of NMT endocranial casts have been based largely on approximations rather than reliable determination...
November 8, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/29130824/longitudinal-structural-and-functional-differences-between-proportional-and-poor-motor-recovery-after-stroke
#18
Adrian G Guggisberg, Pierre Nicolo, Leonardo G Cohen, Armin Schnider, Ethan R Buch
BACKGROUND: Evolution of motor function during the first months after stroke is stereotypically bifurcated, consisting of either recovery to about 70% of maximum possible improvement ("proportional recovery, PROP") or in little to no improvement ("poor recovery, POOR"). There is currently no evidence that any rehabilitation treatment will prevent POOR and favor PROP. OBJECTIVE: To perform a longitudinal and multimodal assessment of functional and structural changes in brain organization associated with PROP...
November 1, 2017: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29123465/autoimmunity-as-a-driving-force-of-cognitive-evolution
#19
Serge Nataf
In the last decades, increasingly robust experimental approaches have formally demonstrated that autoimmunity is a physiological process involved in a large range of functions including cognition. On this basis, the recently enunciated "brain superautoantigens" theory proposes that autoimmunity has been a driving force of cognitive evolution. It is notably suggested that the immune and nervous systems have somehow co-evolved and exerted a mutual selection pressure benefiting to both systems. In this two-way process, the evolutionary-determined emergence of neurons expressing specific immunogenic antigens (brain superautoantigens) has exerted a selection pressure on immune genes shaping the T-cell repertoire...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29122731/post-surgical-cavity-evolution-after-brain-metastases-resection-how-soon-should-postoperative-radiosurgery-follow
#20
Rajal A Patel, Derrick Lock, Irene B Helenowski, James P Chandler, Sean Sachdev, Matthew C Tate, Tim J Kruser
BACKGROUND: Postoperative stereotactic radiosurgery (SRS) to the cavity following resection of brain metastases (BM) improves local control (LC). We hypothesized that significant cavity constriction would take place from the immediate postoperative period to the time of SRS and aimed to elucidate optimal treatment timing. METHODS: We retrospectively reviewed seventy-nine consecutive patients with eighty-five resection cavities treated with SRS following gross total resection of a BM...
November 6, 2017: World Neurosurgery
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