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Neuroanatomy

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https://www.readbyqxmd.com/read/28065775/group-focused-morality-is-associated-with-limited-conflict-detection-and-resolution-capacity-neuroanatomical-evidence
#1
Kyle Nash, Thomas Baumgartner, Daria Knoch
Group-focused moral foundations (GMFs) - moral values that help protect the group's welfare - sharply divide conservatives from liberals and religiously devout from non-believers. However, there is little evidence about what drives this divide. Moral foundations theory and the model of motivated social cognition both associate group-focused moral foundations with differences in conflict detection and resolution capacity, but in opposing directions. Individual differences in conflict detection and resolution implicate specific neuroanatomical differences...
January 5, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28063139/morphological-histological-and-immunohistochemical-study-of-the-area-postrema-in-the-dog
#2
Maria Oliveira, Francisco Fernández, Jordi Solé, Martí Pumarola
Circumventricular organs are specialized brain structures that are located mainly at the midsagittal line, around the third and fourth ventricles, often protruding into the lumen. They are positioned at the interface between the neuroparenchyma and the ventricular system of the brain. These highly vascularized nervous tissue structures differ from the brain parenchyma, as they lack a blood-brain barrier. Circumventricular organs have specialized sensory and secretory functions. It is essential for any pathologist who evaluates brain sections to have a solid knowledge of microscopic neuroanatomy and to recognize these numerous specialized structures within the nervous system as normal and not mistake them for pathological changes...
January 6, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/28052513/improving-late-life-depression-and-cognitive-control-through-the-use-of-therapeutic-video-game-technology-a-proof-of-concept-randomized-trial
#3
Joaquin A Anguera, Faith M Gunning, Patricia A Areán
BACKGROUND: Existing treatments for depression are known to have only modest effects, are insufficiently targeted, and are inconsistently utilized, particularly in older adults. Indeed, older adults with impaired cognitive control networks tend to demonstrate poor response to a majority of existing depression interventions. Cognitive control interventions delivered using entertainment software have the potential to not only target the underlying cerebral dysfunction associated with depression, but to do so in a manner that is engaging and engenders adherence to treatment protocol...
January 3, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28049077/computational-models-of-bitemporal-bifrontal-and-right-unilateral-ect-predict-differential-stimulation-of-brain-regions-associated-with-efficacy-and-cognitive-side-effects
#4
S Bai, V Gálvez, S Dokos, D Martin, M Bikson, C Loo
BACKGROUND: Extensive clinical research has shown that the efficacy and cognitive outcomes of electroconvulsive therapy (ECT) are determined, in part, by the type of electrode placement used. Bitemporal ECT (BT, stimulating electrodes placed bilaterally in the frontotemporal region) is the form of ECT with relatively potent clinical and cognitive side effects. However, the reasons for this are poorly understood. OBJECTIVE: This study used computational modelling to examine regional differences in brain excitation between BT, Bifrontal (BF) and Right Unilateral (RUL) ECT, currently the most clinically-used ECT placements...
December 29, 2016: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28011742/the-superior-temporal-sulcus-is-causally-connected-to-the-amygdala-a-combined-tbs-fmri-study
#5
David Pitcher, Shruti Japee, Lionel Rauth, Leslie G Ungerleider
: Non-human primate neuroanatomical studies have identified a cortical pathway from the superior temporal sulcus (STS) projecting into dorsal sub-regions of the amygdala, but whether this same pathway exists in humans is unknown. Here, we addressed this question by combining thetaburst transcranial magnetic stimulation (TBS) with functional magnetic resonance imaging (fMRI) to test the prediction that the STS and amygdala are functionally connected during face perception. Human participants (N=17) were scanned, over two sessions, while viewing 3-second video clips of moving faces, bodies and objects...
December 23, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27998741/the-scolopidial-accessory-organ-in-the-jerusalem-cricket-orthoptera-stenopelmatidae
#6
Johannes Strauß
Multiple mechanosensory organs form the subgenual organ complex in orthopteroid insects, located in the proximal tibia. In several Ensifera (Orthoptera), a small chordotonal organ, the so-called accessory organ, is the most posterior part of this sensory complex. In order to document the presence of this accessory organ among the Ensifera, the chordotonal sensilla and their innervation in the posterior tibia of two species of Jerusalem crickets (Stenopelmatidae: Stenopelmatus) is described. The sensory structures were stained by axonal tracing...
January 4, 2017: Arthropod Structure & Development
https://www.readbyqxmd.com/read/27995067/brain-imaging-correlates-of-recovered-swallowing-after-dysphagic-stroke-a-fmri-and-dwi-study
#7
Paul Glad Mihai, Mareile Otto, Martin Domin, Thomas Platz, Shaheen Hamdy, Martin Lotze
Neurogenic dysphagia frequently occurs after stroke and deglutitive aspiration is one of the main reasons for subacute death after stroke. Although promising therapeutic interventions for neurogenic dysphagia are being developed, the functional neuroanatomy of recovered swallowing in this population remains uncertain. Here, we investigated 18 patients post-stroke who recovered from dysphagia using an event related functional magnetic resonance imaging (fMRI) study of swallowing. Patients were characterized by initial dysphagia score (mild to severe), lesion mapping, white matter fractional anisotropy (FA) of the pyramidal tracts, and swallowing performance measurement during fMRI scanning...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27989327/pathogenesis-of-pain
#8
REVIEW
Pradeep Dinakar, Alexandra Marion Stillman
The pathogenesis of pain sensation includes mechanisms that result in acute or chronic pain. Pain itself is described as an unpleasant sensory and emotional experience beginning with a peripheral stimulus that undergoes a physiological process ultimately resulting in the sensation of pain. Biologists recognize pain to be a common sign of potential tissue damage. Hence, pain sensation is protective in function. However, pathologic states of pain exist secondary to disruption of the nociceptive process both peripherally and centrally or secondary to psychological conditions...
August 2016: Seminars in Pediatric Neurology
https://www.readbyqxmd.com/read/27960585/challenges-for-the-application-of-optical-stimulation-in-the-cochlea-for-the-study-and-treatment-of-hearing-loss
#9
Rachael T Richardson, Alexander C Thompson, Andrew K Wise, Karina Needham
Electrical stimulation has long been the most effective strategy for evoking neural activity from bionic devices and has been used with great success in the cochlear implant to allow deaf people to hear speech and sound. Despite its success, the spread of electrical current stimulates a broad region of neural tissue meaning that contemporary devices have limited precision. Optical stimulation as an alternative has attracted much recent interest for its capacity to provide highly focused stimuli, and therefore, potentially improved sensory perception...
December 22, 2016: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/27959326/neuroanatomy-accounts-for-age-related-changes-in-risk-preferences
#10
Michael A Grubb, Agnieszka Tymula, Sharon Gilaie-Dotan, Paul W Glimcher, Ifat Levy
Many decisions involve uncertainty, or 'risk', regarding potential outcomes, and substantial empirical evidence has demonstrated that human aging is associated with diminished tolerance for risky rewards. Grey matter volume in a region of right posterior parietal cortex (rPPC) is predictive of preferences for risky rewards in young adults, with less grey matter volume indicating decreased tolerance for risk. That grey matter loss in parietal regions is a part of healthy aging suggests that diminished rPPC grey matter volume may have a role in modulating risk preferences in older adults...
December 13, 2016: Nature Communications
https://www.readbyqxmd.com/read/27930678/structural-differences-in-insular-cortex-reflect-vicarious-injustice-sensitivity
#11
Thomas Baumgartner, Anne Saulin, Grit Hein, Daria Knoch
Sensitivity to injustice inflicted on others is a strong motivator of human social behavior. There are, however, enormous individual differences in vicarious injustice sensitivity. Some people are strongly affected when witnessing injustice, while others barely notice it, but the factors behind this heterogeneity are poorly understood. Here we examine the neuroanatomical basis of these differences using voxel-based morphometry and Freesurfer image analysis suite. Whole brain corrected analyses show that a person's propensity to be vicariously affected by injustice to others is reflected by the gray matter volume and thickness of the bilateral mid insular cortex...
2016: PloS One
https://www.readbyqxmd.com/read/27926437/involvement-of-opioid-signaling-in-food-preference-and-motivation-studies-in-laboratory-animals
#12
I Morales, L Font, P J Currie, R Pastor
Motivation is a complex neurobiological process that initiates, directs, and maintains goal-oriented behavior. Although distinct components of motivated behavior are difficult to investigate, appetitive and consummatory phases of motivation are experimentally separable. Different neurotransmitter systems, particularly the mesolimbic dopaminergic system, have been associated with food motivation. Over the last two decades, however, research focusing on the role of opioid signaling has been particularly growing in this area...
2016: Progress in Brain Research
https://www.readbyqxmd.com/read/27918911/cortical-amygdala-volumetric-ratios-predict-onset-of-symptoms-of-psychosis-in-22q11-2-deletion-syndrome
#13
David Berhanu, Leah M Mattiaccio, Kevin M Antshel, Wanda Fremont, Frank A Middleton, Wendy R Kates
Dysfunction of cortical circuitry involving prefrontal cortex, cingulate gyrus and mesial temporal lobe has been implicated in the pathophysiology of psychotic symptoms. 22q11.2 deletion syndrome (22q11DS) is a neurogenetic disorder that comports a 25-fold increased risk of developing psychosis. Morphological changes in the neuroanatomy of this syndrome may represent a biological risk factor for the development of psychosis. The present study explored ratios between cortical volumes and the amygdala. We also explored relationships between these ratios and the eventual development of psychosis in youth with 22q11DS...
January 30, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/27911792/transcriptomics-and-neuroanatomy-of-the-clonal-raider-ant-implicate-an-expanded-clade-of-odorant-receptors-in-chemical-communication
#14
Sean K McKenzie, Ingrid Fetter-Pruneda, Vanessa Ruta, Daniel J C Kronauer
A major aim of sociogenomic research is to uncover common principles in the molecular evolution of sociality. This endeavor has been hampered by the small number of specific genes currently known to function in social behavior. Here we provide several lines of evidence suggesting that ants have evolved a large and novel clade of odorant receptor (OR) genes to perceive hydrocarbon-based pheromones, arguably the most important signals in ant communication. This genomic expansion is also mirrored in the ant brain via a corresponding expansion of a specific cluster of glomeruli in the antennal lobe...
December 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27910135/towards-a-terminologia-neuroanatomica
#15
Hans J Ten Donkelaar, Jonas Broman, Paul E Neumann, Luis Puelles, Alessandro Riva, R Shane Tubbs, David Kachlik
This article deals with a recent revision of the terminology of the Sections Central Nervous System (CNS; Systema nervosum centrale) and Peripheral Nervous System (PNS; Systema nervosum periphericum) of the Terminologia Anatomica (TA, 1998) and the Terminologia Histologica (TH, 2008). These sections were extensively updated by the Federative International Programme for Anatomical Terminology (FIPAT) Working Group Neuroanatomy of the International Federation of Associations of Anatomists (IFAA). After extensive discussions by FIPAT, and consultation with the IFAA Member Societies, these parts were merged to form a Terminologia Neuroanatomica (TNA)...
November 7, 2016: Clinical Anatomy
https://www.readbyqxmd.com/read/27909802/brain-transcriptome-atlases-a-computational-perspective
#16
REVIEW
Ahmed Mahfouz, Sjoerd M H Huisman, Boudewijn P F Lelieveldt, Marcel J T Reinders
The immense complexity of the mammalian brain is largely reflected in the underlying molecular signatures of its billions of cells. Brain transcriptome atlases provide valuable insights into gene expression patterns across different brain areas throughout the course of development. Such atlases allow researchers to probe the molecular mechanisms which define neuronal identities, neuroanatomy, and patterns of connectivity. Despite the immense effort put into generating such atlases, to answer fundamental questions in neuroscience, an even greater effort is needed to develop methods to probe the resulting high-dimensional multivariate data...
December 1, 2016: Brain Structure & Function
https://www.readbyqxmd.com/read/27903793/the-serotonin-5-ht2c-receptor-and-the-non-addictive-nature-of-classic-hallucinogens
#17
REVIEW
Clinton E Canal, Kevin S Murnane
Classic hallucinogens share pharmacology as serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptor agonists. Unique among most other Schedule 1 drugs, they are generally non-addictive and can be effective tools in the treatment of addiction. Mechanisms underlying these attributes are largely unknown. However, many preclinical studies show that 5-HT2C agonists counteract the addictive effects of drugs from several classes, suggesting this pharmacological property of classic hallucinogens may be significant. Drawing from a comprehensive analysis of preclinical behavior, neuroanatomy, and neurochemistry studies, this review builds rationale for this hypothesis, and also proposes a testable, neurobiological framework...
November 15, 2016: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/27891163/the-visual-system-of-harvestmen-opiliones-arachnida-chelicerata-a-re-examination
#18
Tobias Lehmann, Eva Lodde-Bensch, Roland R Melzer, Martina Metz
BACKGROUND: The visual systems in chelicerates are poorly understood, even though they show strong variation in eye and visual neuropil architecture, thus may provide valuable insights for the understanding of chelicerate phylogeny and eye evolution. Comparable morphological characters are desperately sought for reconstructions of the phylogeny of Chelicerata, especially with respect to Arachnida. So far, reliable data exist only for Pycnogonida, Xiphosura, Scorpiones, and Araneae. The few earlier studies of the organisation of the visual system in harvestmen are contradictory concerning the number, morphology, and position of the visual neuropils...
2016: Frontiers in Zoology
https://www.readbyqxmd.com/read/27891081/the-brain-of-the-archerfish-toxotes-chatareus-a-nissl-based-neuroanatomical-atlas-and-catecholaminergic-cholinergic-systems
#19
Naomi Karoubi, Ronen Segev, Mario F Wullimann
Over recent years, the seven-spot archerfish (Toxotes chatareus) has emerged as a new model for studies in visual and behavioral neuroscience thanks to its unique hunting strategy. Its natural ability to spit at insects outside of water can be used in the laboratory for well controlled behavioral experiments where the fish is trained to aim at targets on a screen. The need for a documentation of the neuroanatomy of this animal became critical as more research groups use it as a model. Here we present an atlas of adult T...
2016: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/27887995/chronic-stress-and-hippocampal-dendritic-complexity-methodological-and-functional-considerations
#20
REVIEW
Cheryl D Conrad, J Bryce Ortiz, Jessica M Judd
The current understanding of how chronic stress impacts hippocampal dendritic arbor complexity and the subsequent relationship to hippocampal-dependent spatial memory is reviewed. A surge in reports investigating hippocampal dendritic morphology is occurring, but with wide variations in methodological detail being reported. Consequently, this review systematically outlines the basic neuroanatomy of relevant hippocampal features to help clarify how chronic stress or glucocorticoids impact hippocampal dendritic complexity and how these changes occur in parallel with spatial cognition...
November 22, 2016: Physiology & Behavior
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