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Neuroanatomy

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https://www.readbyqxmd.com/read/28531897/magnetic-resonance-imaging-of-the-brain-of-a-monotreme-the-short-beaked-echidna-tachyglossus-aculeatus
#1
Sandilya Cherupalli, Craig D Hardman, Andre Bongers, Ken W S Ashwell
We used magnetic resonance imaging to study the anatomy of cortical regions, nuclear groups, and major tracts in the brain of a monotreme, i.e., the short-beaked echidna (Tachyglossus aculeatus). Our specimens were from a collection held at the Australian Museum in Sydney and had been stored in formaldehyde solution for at least 70 years. Despite this, we were able to detect fine detail in the nuclear divisions of structures as well as in fiber tracts. In particular, we could detect the medial lemniscus as it approached the ventral posterior thalamic nucleus, subdivisions within the ventral posterior thalamic nucleus, lamination and subdivisions within the hippocampal formation, components of the olfactory pathways, and nuclei within the temporal amygdala...
May 23, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/28523977/the-application-of-deep-brain-stimulation-in-the-treatment-of-psychiatric-disorders
#2
Ilse Graat, Martijn Figee, Damiaan Denys
Deep brain stimulation (DBS) is a last-resort treatment for neurological and psychiatric disorders that are refractory to standard treatment. Over the last decades, the progress of DBS in psychiatry has been slower than in neurology, in part owing to the heterogenic symptomatology and complex neuroanatomy of psychiatric disorders. However, for obsessive-compulsive disorder (OCD) DBS is now an accepted treatment. This study first reviews clinical outcomes and mechanisms of DBS for OCD, and then discusses these results in an overview of current and future psychiatric applications, including DBS for mood disorders, Tourette's syndrome, addiction, anorexia nervosa, autism, schizophrenia, and anxiety disorders...
April 2017: International Review of Psychiatry
https://www.readbyqxmd.com/read/28523935/head-neck-and-neuroanatomy-thieme-atlas-of-anatomy-schuenke-m-schulte-e-schumacher-u-head-neck-and-neuroanatomy-thieme-atlas-of-anatomy-thieme-stuttgart-2016-600-pp-9781626231696-%C3%A2-69-99-pbk
#3
https://www.readbyqxmd.com/read/28515873/brain-morphology-of-the-threespine-stickleback-gasterosteus-aculeatus-varies-inconsistently-with-respect-to-habitat-complexity-a-test-of-the-clever-foraging-hypothesis
#4
Newaz I Ahmed, Cole Thompson, Daniel I Bolnick, Yoel E Stuart
The Clever Foraging Hypothesis asserts that organisms living in a more spatially complex environment will have a greater neurological capacity for cognitive processes related to spatial memory, navigation, and foraging. Because the telencephalon is often associated with spatial memory and navigation tasks, this hypothesis predicts a positive association between telencephalon size and environmental complexity. The association between habitat complexity and brain size has been supported by comparative studies across multiple species but has not been widely studied at the within-species level...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28508291/lobular-homology-in-cerebellar-hemispheres-of-humans-non-human-primates-and-rodents-a-structural-axonal-tracing-and-molecular-expression-analysis
#5
REVIEW
Yuanjun Luo, Hirofumi Fujita, Hermina Nedelescu, Mohammad Shahangir Biswas, Chika Sato, Sarah Ying, Mayu Takahashi, Keiichi Akita, Tatsuya Higashi, Ichio Aoki, Izumi Sugihara
Comparative neuroanatomy provides insights into the evolutionary functional adaptation of specific mammalian cerebellar lobules, in which the lobulation pattern and functional localization are conserved. However, accurate identification of homologous lobules among mammalian species is challenging. In this review, we discuss the inter-species homology of crus I and II lobules which occupy a large volume in the posterior cerebellar hemisphere, particularly in humans. Both crus I/II in humans are homologous to crus I/II in non-human primates, according to Paxinos and colleagues; however, this area has been defined as crus I alone in non-human primates, according to Larsell and Brodal...
May 15, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28506483/cortical-and-subcortical-functional-neuroanatomy-for-low-grade-glioma-surgery
#6
REVIEW
L Chenin, M Lefranc, S Velut, P Foulon, E Havet, J Peltier
Knowledge of the encephalon anatomy is crucial for neurosurgical practice, especially the main cortical functional structures and their connections. General organisation of the encephalon is presented with frontal, parietal, occipital, temporal, limbic and insular lobes and their Brodmann correspondence. Secondly, subcortical anatomy will be presented with main white matter fasciculi in three separated categories: association, commissural and projection fibers. Main association fibers are inferior occipitofrontal fasciculus, superior longitudinal fasciculus, arcuate fasciculus, inferior longitudinal fasciculus, uncinate fasciculus, and cingulum...
May 12, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28501034/differences-in-the-students-perceptions-on-the-teaching-of-neuroanatomy-in-a-medical-curriculum-organized-by-disciplines-and-an-integrated-medical-curriculum
#7
Mavilde Arantes, Joselina Barbosa, Maria Amélia Ferreira
INTRODUCTION: On the subject of curriculum reform, most European medical schools are moving away from an educational approach consisting of discipline-based courses to an integrated curriculum. The aim of this study was to compare, in the Faculty of Medicine of the University of Porto, Portugal, the teaching of neuroanatomy in a medical curriculum organized by disciplines and in an integrated medical curriculum. MATERIAL AND METHODS: Two hundred sixty one students who completed the Curricular Unit with a discipline-based approach (Neuroanatomy) and 202 students who completed it with an integrated approach (Morphophysiology of the Nervous System) were asked to complete a questionnaire on their perceptions about the Curricular Unit...
January 31, 2017: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28481118/how-working-memory-enables-fluid-reasoning
#8
Milton J Dehn
The strong relation between fluid reasoning (Gf) and working memory (WM) is well established. Gf depends on WM to hold necessary information in a span of awareness until the reasoning task is completed. The influence of time constraints on the Gf-WM relation indicates that the abilities to control attention and inhibit interference may be the underlying traits that account for the Gf-WM relation. Neuroanatomy also explains the interrelations among these cognitive processes. Neuroimaging (fMRI) studies have confirmed that the same regions of the prefrontal cortex (PFC) are active during Gf and WM functioning...
May 8, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/28470552/neural-mechanisms-and-functional-neuroanatomical-networks-during-memory-and-cue-based-task-switching-as-revealed-by-residue-iteration-decomposition-ride-based-source-localization
#9
Nicole Wolff, Moritz Mückschel, Christian Beste
Task switching processes reflect a faculty of cognitive flexibility. The underlying neural mechanisms and functional cortical networks have frequently been investigated using neurophysiological (EEG) or functional imaging methods. However, task switching processes are subject to strong intra-individual variability, especially when tested under varying levels of working memory demands. This intra-individual variability compromises the reliable estimation of neurophysiological processes and related functional neuroanatomical networks...
May 3, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28466429/sleep-disturbances-in-the-prodromal-stage-of-parkinson-disease
#10
REVIEW
Ahmed Al-Qassabi, Seyed-Mohammad Fereshtehnejad, Ronald B Postuma
Decades of research on neurodegenerative diseases such as Parkinson's disease (PD) have shifted our focus from clinical symptomatic stages to one step earlier, the prodromal stage. There is convincing evidence showing that sleep disorders such as excessive daytime somnolence, insomnia, obstructive sleep apnea, and particularly REM sleep behavior disorder (RBD) are potential prodromal features starting years and decades before conversion to PD. This review aims to provide an overview on various sleep disorders as prodromal features of PD...
June 2017: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/28465274/gerard-blaes-blasius-1627-1682-the-dutch-physician-and-chemist-his-work-and-his-description-of-the-spinal-cord
#11
REVIEW
Konstantinos Markatos, Konstantinos Laios, Demetrios Korres, Anna Tzivra, Spyridon Tsoutsos, Georgios Androutsos
The purpose of this historical review is to summarize the work of the Dutch physician, chemist and anatomist Gerard Blaes (Blasius). A detailed account of his life and work is presented with emphasis on his contribution to anatomy. In particular, special reference is made to his innovative description of the spinal cord and spinal nerves. The contribution of Gerard Blasius to neuroanatomy was remarkable when taking into account the limited technology and lack of modern devices of his era. As a true man of his era, he had a significant contribution in research and teaching of anatomy, botany and chemistry...
April 29, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28463345/the-intense-desire-for-healthy-limb-amputation-a-dis-proprioceptive-neuropsychiatric-disorder
#12
Mihir A Upadhyaya, Henry A Nasrallah
BACKGROUND: The first mention of a condition in which apparently nonpsychotic individuals have a strong, unrelenting desire to amputate ≥1 of their healthy limbs was published nearly 4 decades ago. Once dismissed as a paraphilia, the condition in recent years has been re-investigated with neurologic testing and imaging, yielding evidence suggesting it may be attributable to a neuroanatomical anomaly. METHODS: A literature review of data was conducted of recently published studies with pinprick testing, magnetic resonance imaging (MRI)/functional MRI imaging, magnetoencephalography, and interviews of individuals with a desire for limb amputation...
May 2017: Annals of Clinical Psychiatry: Official Journal of the American Academy of Clinical Psychiatrists
https://www.readbyqxmd.com/read/28461582/media-and-book-reviews-clinical-neurology-and-neuroanatomy-a-localization-based-approach
#13
Emer R McGrath
No abstract text is available yet for this article.
May 2, 2017: Neurology
https://www.readbyqxmd.com/read/28460009/the-endogenous-stress-hormone-crh-modulates-excitatory-transmission-and-network-physiology-in-hippocampus
#14
B G Gunn, C D Cox, Y Chen, M Frotscher, C M Gall, T Z Baram, G Lynch
Memory is strongly influenced by stress but underlying mechanisms are unknown. Here, we used electrophysiology, neuroanatomy, and network simulations to probe the role of the endogenous, stress-related neuropeptide corticotropin-releasing hormone (CRH) in modulating hippocampal function. We focused on neuronal excitability and the incidence of sharp waves (SPWs), a form of intrinsic network activity associated with memory consolidation. Specifically, we blocked endogenous CRH using 2 chemically distinct antagonists of the principal hippocampal CRH receptor, CRHR1...
April 28, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28458632/the-monoamine-brainstem-reticular-formation-as-a-paradigm-for-re-defining-various-phenotypes-of-parkinson-s-disease-owing-genetic-and-anatomical-specificity
#15
REVIEW
Stefano Gambardella, Rosangela Ferese, Francesca Biagioni, Carla L Busceti, Rosa Campopiano, Anna M P Griguoli, Fiona Limanaqi, Giuseppe Novelli, Marianna Storto, Francesco Fornai
The functional anatomy of the reticular formation (RF) encompasses a constellation of brain regions which are reciprocally connected to sub-serve a variety of functions. Recent evidence indicates that neuronal degeneration within one of these regions spreads synaptically along brainstem circuitries. This is exemplified by the recruitment of various brainstem reticular nuclei in specific Parkinson's disease (PD) phenotypes, and by retrospective analysis of lethargic post-encephalitic parkinsonism. In fact, the spreading to various monoamine reticular nuclei can be associated with occurrence of specific motor and non-motor symptoms (NMS)...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28450851/regulation-of-agouti-related-protein-and-pro-opiomelanocortin-gene-expression-in-the-avian-arcuate-nucleus
#16
REVIEW
Timothy Boswell, Ian C Dunn
The arcuate nucleus is generally conserved across vertebrate taxa in its neuroanatomy and neuropeptide expression. Gene expression of agouti-related protein (AGRP), neuropeptide Y (NPY), pro-opiomelanocortin (POMC), and cocaine- and amphetamine-regulated transcript (CART) has been established in the arcuate nucleus of several bird species and co-localization demonstrated for AGRP and NPY. The proteins encoded by these genes exert comparable effects on food intake in birds after central administration to those seen in other vertebrates, with AGRP and NPY being orexigenic and CART and α-melanocyte-stimulating hormone anorexigenic...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28439230/from-anxious-to-reckless-a-control-systems-approach-unifies-prefrontal-limbic-regulation-across-the-spectrum-of-threat-detection
#17
REVIEW
Lilianne R Mujica-Parodi, Jiook Cha, Jonathan Gao
Here we provide an integrative review of basic control circuits, and introduce techniques by which their regulation can be quantitatively measured using human neuroimaging. We illustrate the utility of the control systems approach using four human neuroimaging threat detection studies (N = 226), to which we applied circuit-wide analyses in order to identify the key mechanism underlying individual variation. In so doing, we build upon the canonical prefrontal-limbic control system to integrate circuit-wide influence from the inferior frontal gyrus (IFG)...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28438070/creation-of-a-novel-simulator-for-minimally-invasive-neurosurgery-fusion-of-3d-printing-and-special-effects
#18
Peter Weinstock, Roberta Rehder, Sanjay P Prabhu, Peter W Forbes, Christopher J Roussin, Alan R Cohen
OBJECTIVE Recent advances in optics and miniaturization have enabled the development of a growing number of minimally invasive procedures, yet innovative training methods for the use of these techniques remain lacking. Conventional teaching models, including cadavers and physical trainers as well as virtual reality platforms, are often expensive and ineffective. Newly developed 3D printing technologies can recreate patient-specific anatomy, but the stiffness of the materials limits fidelity to real-life surgical situations...
April 25, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28434769/kleine-levin-syndrome-an-update-and-mini-review
#19
REVIEW
Natan Gadoth, Arie Oksenberg
Since 1962, when Critchley and Hoffman coined the term Kleine-Levin Syndrome (KLS) for the triad of hypersomnia, excessive eating and "often abnormal behavior" which they have observed in 11 adolescent boys, the number of patients recognized with this rare syndrome expanded, the spectrum of the clinical presentation, disease course, prognosis, gender specificity and the presence of familial cases were established. However, in spite of the progress made in neuroscience, the search for the cause, neuroanatomy, pathophysiology and drug treatment of KLS is still ongoing...
April 20, 2017: Brain & Development
https://www.readbyqxmd.com/read/28433420/dna-methylation-program-in-normal-and-alcohol-induced-thinning-cortex
#20
Nail Can Öztürk, Marisol Resendiz, Hakan Öztürk, Feng C Zhou
While cerebral underdevelopment is a hallmark of fetal alcohol spectrum disorders (FASD), the mechanism(s) guiding the broad cortical neurodevelopmental deficits are not clear. DNA methylation is known to regulate early development and tissue specification through gene regulation. Here, we examined DNA methylation in the onset of alcohol-induced cortical thinning in a mouse model of FASD. C57BL/6 (B6) mice were administered a 4% alcohol (v/v) liquid diet from embryonic (E) days 7-16, and their embryos were harvested at E17, along with isocaloric liquid diet and lab chow controls...
May 2017: Alcohol
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