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https://www.readbyqxmd.com/read/27903877/assessing-the-manipulative-potentials-of-monkeys-apes-and-humans-from-hand-proportions-implications-for-hand-evolution
#1
Ming-Jin Liu, Cai-Hua Xiong, Di Hu
The hand structure possesses a greater potential for performing manipulative skills than is typically observed, whether in humans or non-human anthropoids. However, a precise assessment of the potential manipulative skills of hands has been challenging, which hampers our understanding of the evolution of manipulative abilities in anthropoid hands. Here, we establish a functional model to quantitatively infer the manipulative potentials of anthropoid hands based on hand proportions. Our results reveal a large disparity of manipulative potentials among anthropoid hands...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27902687/limb-bone-structural-proportions-and-locomotor-behavior-in-a-l-288-1-lucy
#2
Christopher B Ruff, M Loring Burgess, Richard A Ketcham, John Kappelman
While there is broad agreement that early hominins practiced some form of terrestrial bipedality, there is also evidence that arboreal behavior remained a part of the locomotor repertoire in some taxa, and that bipedal locomotion may not have been identical to that of modern humans. It has been difficult to evaluate such evidence, however, because of the possibility that early hominins retained primitive traits (such as relatively long upper limbs) of little contemporaneous adaptive significance. Here we examine bone structural properties of the femur and humerus in the Australopithecus afarensis A...
2016: PloS One
https://www.readbyqxmd.com/read/27901327/stem-cell-therapy-for-sequestering-neuroinflammation-in-traumatic-brain-injury-an-update-on-exosome-targeting-to-the-spleen
#3
Marci G Crowley, Michael G Liska, Cesar V Borlongan
Traumatic brain injury (TBI), manifests with acute and chronic cell death pathways leading to initial impacted injury and subsequent neurodegeneration. In particular, the secondary cell death, plagued by a massive and lingering neuroinflammatory response, contributes significantly to worsening outcomes of the progressive TBI pathology. Fortunately, neuroinflammation also provides an opportunity for therapeutic interventions. Limited treatment options currently exist for the disease, but stem cell-based therapies offer promise in promoting neuroprotection and neuroregeneration by mitigating central neuroinflammation as well as modulating peripheral inflammation via the spleen...
November 30, 2016: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/27894418/discovery-of-methylfarnesoate-as-the-annelid-brain-hormone-reveals-an-ancient-role-of-sesquiterpenoids-in-reproduction
#4
Sven Schenk, Christian Krauditsch, Peter Frühauf, Christopher Gerner, Florian Raible
Animals require molecular signals to determine when to divert resources from somatic functions to reproduction. This decision is vital in animals that reproduce in an all-or-nothing mode, such as bristle worms: females committed to reproduction spend roughly half their body mass for yolk and egg production; following mass spawning, the parents die. An enigmatic brain hormone activity suppresses reproduction. We now identify this hormone as the sesquiterpenoid methylfarnesoate. Methylfarnesoate suppresses transcript levels of the yolk precursor Vitellogenin both in cell culture and in vivo, directly inhibiting a central energy-costly step of reproductive maturation...
November 29, 2016: ELife
https://www.readbyqxmd.com/read/27894011/comparison-of-ilae-2010-and-semiological-seizure-classification-in-children-with-epilepsy
#5
Tugba Hirfanoglu, Ayse Serdaroglu, Irem Capraz, Erhan Bilir, Ebru Petek Arhan, Kursad Aydin
OBJECTIVE: The aim of this study was to compare both ILAE 2010 and semiological seizure classification (SSC) in terms of their applicability and utility and to predict epileptogenic zone in children with epilepsy. METHODS: Both ILAE 2010 classification and SSC which is a part of five dimensional classification were applied for a total 138 children by dividing into younger (≤6y/o) and older (>6y/o) age groups over the last two years as retrospectively. After the assessment of the seizures types, epilepsy syndromes, and etiologies; the data were also compared to evaluate if having correlation between epileptogenic zone and seizure subtypes in both ILAE 2010 and SSC...
November 21, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27893674/relapsing-remitting-lesions-in-a-woman-with-progressive-hemifacial-atrophy-and-chronic-hepatitis-b-virus-infection-a-case-report
#6
Ying Zhang, Mingqin Zhu, Xiaozhen Li, Jing Miao, Chenchen Duan, Li Cui, Xuefan Yu
INTRODUCTION: Progressive hemifacial atrophy (PHA) is a rare disorder characterized by unilateral facial atrophy affecting the skin, subcutaneous tissue, and fat, muscle, and osteocartilagenous structures creating a sunken hemiface appearance.Etiopathogenesis of PHA is poorly understood; no definitive treatment is currently available. CLINICAL FINDINGS: We report a 41-year-old woman with PHA who showed an uncharacteristic "relapsing-remitting" evolution of brain lesions and was seropositive for hepatitis B virus (HBV)...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27889766/telencephalic-neuronal-activation-associated-with-spatial-memory-in-the-terrestrial-toad-rhinella-arenarum-participation-of-the-medial-pallium-during-navigation-by-geometry
#7
María Inés Sotelo, M Florencia Daneri, Verner Peter Bingman, Rubén N Muzio
Amphibians are central to discussions of vertebrate evolution because they represent the transition from aquatic to terrestrial life, a transition with profound consequences for the selective pressures shaping brain evolution. Spatial navigation is one class of behavior that has attracted the interest of comparative neurobiologists because of the relevance of the medial pallium/hippocampus, yet, surprisingly, in this regard amphibians have been sparsely investigated. In the current study, we trained toads to locate a water goal relying on the boundary geometry of a test environment (Geometry-Only) or boundary geometry coupled with a prominent, visual feature cue (Geometry-Feature)...
November 26, 2016: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/27888226/single-cell-sequencing-maps-gene-expression-to-mutational-phylogenies-in-pdgf-and-egf-driven-gliomas
#8
Sören Müller, Siyuan John Liu, Elizabeth Di Lullo, Martina Malatesta, Alex A Pollen, Tomasz J Nowakowski, Gary Kohanbash, Manish Aghi, Arnold R Kriegstein, Daniel A Lim, Aaron Diaz
Glioblastoma multiforme (GBM) is the most common and aggressive type of primary brain tumor. Epidermal growth factor (EGF) and platelet-derived growth factor (PDGF) receptors are frequently amplified and/or possess gain-of-function mutations in GBM However, clinical trials of tyrosine-kinase inhibitors have shown disappointing efficacy, in part due to intra-tumor heterogeneity. To assess the effect of clonal heterogeneity on gene expression, we derived an approach to map single-cell expression profiles to sequentially acquired mutations identified from exome sequencing...
November 25, 2016: Molecular Systems Biology
https://www.readbyqxmd.com/read/27886811/morphoarchitectural-variation-in-south-african-fossil-cercopithecoid-endocasts
#9
Amélie Beaudet, Jean Dumoncel, Frikkie de Beer, Benjamin Duployer, Stanley Durrleman, Emmanuel Gilissen, Jakobus Hoffman, Christophe Tenailleau, John Francis Thackeray, José Braga
Despite the abundance of well-preserved crania and natural endocasts in the South African Plio-Pleistocene cercopithecoid record, which provide direct information relevant to the evolution of their endocranial characteristics, few studies have attempted to characterize patterns of external brain morphology in this highly successful primate Superfamily. The availability of non-destructive penetrating radiation imaging systems, together with recently developed computer-based analytical tools, allow for high resolution virtual imaging and modeling of the endocranial casts and thus disclose new perspectives in comparative paleoneurology...
December 2016: Journal of Human Evolution
https://www.readbyqxmd.com/read/27886204/characterization-of-structural-connectivity-of-the-default-mode-network-in-dogs-using-diffusion-tensor-imaging
#10
Jennifer L Robinson, Madhura Baxi, Jeffrey S Katz, Paul Waggoner, Ronald Beyers, Edward Morrison, Nouha Salibi, Thomas S Denney, Vitaly Vodyanoy, Gopikrishna Deshpande
Diffusion tensor imaging (DTI) provides us an insight into the micro-architecture of white-matter tracts in the brain. This method has proved promising in understanding and investigating the neuronal tracts and structural connectivity between the brain regions in primates as well as rodents. The close evolutionary relationship between canines and humans may have spawned a unique bond in regard to social cognition rendering them useful as an animal model in translational research. In this study, we acquired diffusion data from anaesthetized dogs and created a DTI-based atlas for a canine model which could be used to investigate various white matter diseases...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27884770/neutrophil-granulocytes-in-cerebral-ischemia-evolution-from-killers-to-key-players
#11
REVIEW
Jan-Kolja Strecker, Antje Schmidt, Wolf-Rüdiger Schäbitz, Jens Minnerup
Neutrophil granulocytes (or polymorphonuclear cells, PMNs) have long been considered as crude killing machines, particularly trained to attack bacterial or fungal pathogens in wounds or infected tissues. That perspective has fundamentally changed over the last decades, as PMNs have been shown to exert a livery exchange between other cells of the innate and adaptive immune system. PMNs do provide major immunomodulatory contribution during acute inflammation and subsequent clearance. Following sterile inflammation like cerebral ischemia, PMNs are among the first hematogenous cells attracted to the ischemic tissue...
November 21, 2016: Neurochemistry International
https://www.readbyqxmd.com/read/27884462/dual-neural-network-model-for-the-evolution-of-speech-and-language
#12
REVIEW
Steffen R Hage, Andreas Nieder
Explaining the evolution of speech and language poses one of the biggest challenges in biology. We propose a dual network model that posits a volitional articulatory motor network (VAMN) originating in the prefrontal cortex (PFC; including Broca's area) that cognitively controls vocal output of a phylogenetically conserved primary vocal motor network (PVMN) situated in subcortical structures. By comparing the connections between these two systems in human and nonhuman primate brains, we identify crucial biological preadaptations in monkeys for the emergence of a language system in humans...
November 21, 2016: Trends in Neurosciences
https://www.readbyqxmd.com/read/27883015/mr-vascular-fingerprinting-in-stroke-and-brain-tumors-models
#13
B Lemasson, N Pannetier, N Coquery, Ligia S B Boisserand, Nora Collomb, N Schuff, M Moseley, G Zaharchuk, E L Barbier, T Christen
In this study, we evaluated an MRI fingerprinting approach (MRvF) designed to provide high-resolution parametric maps of the microvascular architecture (i.e., blood volume fraction, vessel diameter) and function (blood oxygenation) simultaneously. The method was tested in rats (n = 115), divided in 3 models: brain tumors (9 L, C6, F98), permanent stroke, and a control group of healthy animals. We showed that fingerprinting can robustly distinguish between healthy and pathological brain tissues with different behaviors in tumor and stroke models...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27881751/artificial-selection-on-male-genitalia-length-alters-female-brain-size
#14
Séverine D Buechel, Isobel Booksmythe, Alexander Kotrschal, Michael D Jennions, Niclas Kolm
Male harassment is a classic example of how sexual conflict over mating leads to sex-specific behavioural adaptations. Females often suffer significant costs from males attempting forced copulations, and the sexes can be in an arms race over male coercion. Yet, despite recent recognition that divergent sex-specific interests in reproduction can affect brain evolution, sexual conflict has not been addressed in this context. Here, we investigate whether artificial selection on a correlate of male success at coercion, genital length, affects brain anatomy in males and females...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27880966/age-dependency-of-location-of-epileptic-foci-in-continuous-spike-and-waves-during-sleep-a-parallel-to-the-posterior-anterior-trajectory-of-slow-wave-activity
#15
Bigna Katrin Bölsterli Heinzle, Thomas Bast, Hanne Critelli, Reto Huber, Bernhard Schmitt
Background Epileptic encephalopathy with continuous spike-and-waves during sleep (CSWS) occurs during childhood and is characterized by an activation of spike wave complexes during slow wave sleep. The location of epileptic foci is variable, as is etiology. A relationship between the epileptic focus and age has been shown in various focal epilepsies following a posterior-anterior trajectory, and a link to brain maturation has been proposed.We hypothesize that in CSWS, maximal spike wave activity, corresponding to the epileptic focus, is related to age and shows a posterior-anterior evolution...
November 23, 2016: Neuropediatrics
https://www.readbyqxmd.com/read/27878434/regional-selection-of-the-brain-size-regulating-gene-casc5-provides-new-insight-into-human-brain-evolution
#16
Lei Shi, Enzhi Hu, Zhenbo Wang, Jiewei Liu, Jin Li, Ming Li, Hua Chen, Chunshui Yu, Tianzi Jiang, Bing Su
Human evolution is marked by a continued enlargement of the brain. Previous studies on human brain evolution focused on identifying sequence divergences of brain size regulating genes between humans and nonhuman primates. However, the evolutionary pattern of the brain size regulating genes during recent human evolution is largely unknown. We conducted a comprehensive analysis of the brain size regulating gene CASC5 and found that in recent human evolution, CASC5 has accumulated many modern human specific amino acid changes, including two fixed changes and six polymorphic changes...
November 22, 2016: Human Genetics
https://www.readbyqxmd.com/read/27877146/a-gradualist-scenario-for-language-evolution-precise-linguistic-reconstruction-of-early-human-and-neandertal-grammars
#17
Ljiljana Progovac
In making an argument for the antiquity of language, based on comparative evidence, Dediu and Levinson (2013) express hope that some combinations of structural features will prove so conservative that they will allow deep linguistic reconstruction. I propose that the earliest stages of syntax/grammar as reconstructed in Progovac (2015a), based on a theoretical and data-driven linguistic analysis, provide just such a conservative platform, which would have been commanded also by Neandertals and the common ancestor...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27875590/spatio-temporal-progression-of-cortical-activity-related-to-continuous-overt-and-covert-speech-production-in-a-reading-task
#18
Jonathan S Brumberg, Dean J Krusienski, Shreya Chakrabarti, Aysegul Gunduz, Peter Brunner, Anthony L Ritaccio, Gerwin Schalk
How the human brain plans, executes, and monitors continuous and fluent speech has remained largely elusive. For example, previous research has defined the cortical locations most important for different aspects of speech function, but has not yet yielded a definition of the temporal progression of involvement of those locations as speech progresses either overtly or covertly. In this paper, we uncovered the spatio-temporal evolution of neuronal population-level activity related to continuous overt speech, and identified those locations that shared activity characteristics across overt and covert speech...
2016: PloS One
https://www.readbyqxmd.com/read/27871856/will-cardiac-optogenetics-find-the-way-through-the-obscure-angles-of-heart-physiology
#19
Nicola Pianca, Tania Zaglia, Marco Mongillo
Optogenetics is a technique exploded in the last 10 years, which revolutionized several areas of biological research. The brightest side of this technology is the use of light to modulate non-invasively, with high spatial resolution and millisecond time scale, excitable cells genetically modified to express light-sensitive microbial ion channels (opsins). Neuroscience has first benefited from such fascinating strategy, in intact organisms. By shining light to specific neuronal subpopulations, optogenetics allowed unearth the mechanisms involved in cell-to-cell communication within the context of intact organs, such as the brain, formed by complex neuronal circuits...
November 18, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27870408/sex-specific-effects-of-the-huntington-gene-on-normal-neurodevelopment
#20
Jessica K Lee, Yue Ding, Amy L Conrad, Elena Cattaneo, Eric Epping, Kathy Mathews, Pedro Gonzalez-Alegre, Larry Cahill, Vincent Magnotta, Bradley L Schlaggar, Joel S Perlmutter, Regina E Y Kim, Jeffrey D Dawson, Peg Nopoulos
Huntington disease is a neurodegenerative disorder caused by a gene (HTT) with a unique feature of trinucleotide repeats ranging from 10 to 35 in healthy people; when expanded beyond 39 repeats, Huntington disease develops. Animal models demonstrate that HTT is vital to brain development; however, this has not been studied in humans. Moreover, evidence suggests that triplet repeat genes may have been vital in evolution of the human brain. Here we evaluate brain structure using magnetic resonance imaging and brain function using cognitive tests in a sample of school-aged children ages 6 to 18 years old...
January 2, 2017: Journal of Neuroscience Research
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