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Sensory integration

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https://www.readbyqxmd.com/read/29779050/proprioceptive-loss-and-the-perception-control-and-learning-of-arm-movements-in-humans-evidence-from-sensory-neuronopathy
#1
R Chris Miall, Nick M Kitchen, Se-Ho Nam, Hannah Lefumat, Alix G Renault, Kristin Ørstavik, Jonathan D Cole, Fabrice R Sarlegna
It is uncertain how vision and proprioception contribute to adaptation of voluntary arm movements. In normal participants, adaptation to imposed forces is possible with or without vision, suggesting that proprioception is sufficient; in participants with proprioceptive loss (PL), adaptation is possible with visual feedback, suggesting that proprioception is unnecessary. In experiment 1 adaptation to, and retention of, perturbing forces were evaluated in three chronically deafferented participants. They made rapid reaching movements to move a cursor toward a visual target, and a planar robot arm applied orthogonal velocity-dependent forces...
May 19, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29778970/bottom-up-and-top-down-modulation-of-multisensory-integration
#2
REVIEW
Ilsong Choi, Jae-Yun Lee, Seung-Hee Lee
Sensory perception in the real world requires proper integration of different modality inputs. Process of multisensory integration is not uniform. It varies from individual to individual and changes at different behavioral states of the animal. What factors affect multisensory integration? How does the mammalian brain reconstruct a multisensory world at different states? Here, we summarize recent findings on bottom-up and top-down factors that can modulate sensory processing and multisensory integration. We discuss cortical circuits that are responsible for modulation of multisensory processing based on recent rodent studies...
May 17, 2018: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/29773806/sensory-representation-of-an-auditory-cued-tactile-stimulus-in-the-posterior-parietal-cortex-of-the-mouse
#3
Hemanth Mohan, Yasir Gallero-Salas, Stefano Carta, João Sacramento, Balazs Laurenczy, Lazar T Sumanovski, Christiaan P J de Kock, Fritjof Helmchen, Shankar Sachidhanandam
Sensory association cortices receive diverse inputs with their role in representing and integrating multi-sensory content remaining unclear. Here we examined the neuronal correlates of an auditory-tactile stimulus sequence in the posterior parietal cortex (PPC) using 2-photon calcium imaging in awake mice. We find that neuronal subpopulations in layer 2/3 of PPC reliably represent texture-touch events, in addition to auditory cues that presage the incoming tactile stimulus. Notably, altering the flow of sensory events through omission of the cued texture touch elicited large responses in a subset of neurons hardly responsive to or even inhibited by the tactile stimuli...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772227/evolutionary-shift-towards-lateral-line-dependent-prey-capture-behavior-in-the-blind-mexican-cavefish
#4
Evan Lloyd, Courtney Olive, Bethany A Stahl, James B Jaggard, Paloma Amaral, Erik R Duboue, Alex C Keene
Feeding strategies are dependent on multi-modal sensory processing, that integrates visual, chemosensory, and mechanoreceptive cues. In many fish species, local environments and food availability dramatically influence the evolution of sensory and morphological traits that underlie feeding. The Mexican cavefish, Astyanax mexicanus, have developed robust changes in sensory-dependent behaviors, but the impact on prey detection and feeding behavior is not known. In the absence of eyes, cavefish have evolved enhanced sensitivity of the lateral line, comprised of mechanosensory organs that sense water flow and detect prey...
May 14, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29769622/a-simple-power-law-governs-many-sensory-amplifications-and-multisensory-enhancements
#5
Vincent A Billock, Paul R Havig
When one sensory response occurs in the presence of a different sensory stimulation, the sensory response is often amplified. The variety of sensory enhancement data tends to obscure the underlying rules, but it has long been clear that weak signals are usually amplified more than strong ones (the Principle of Inverse Effectiveness). Here we show that for many kinds of sensory amplification, the underlying law is simple and elegant: the amplified response is a power law of the unamplified response, with a compressive exponent that amplifies weak signals more than strong...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29769219/yif1-associates-with-yip1-on-golgi-and-regulates-dendrite-pruning-in-sensory-neurons-during-drosophila-metamorphosis
#6
Qiwei Wang, Yan Wang, Fengwei Yu
Pruning that selectively removes unnecessary neurites without causing neuronal death is essential for sculpting the mature nervous system during development. In Drosophila , ddaC sensory neurons specifically prune their larval dendrites with intact axons during metamorphosis. However, it remains unknown about an important role of ER-to-Golgi transport in dendrite pruning. Here, in a clonal screen we identified Yif1, an uncharacterized Drosophila homologue of Yif1p that is known as a regulator of ER-to-Golgi transport in yeast...
May 16, 2018: Development
https://www.readbyqxmd.com/read/29766764/local-cortical-activity-of-distant-brain-areas-can-phase-lock-to-the-olfactory-bulb-s-respiratory-rhythm-in-the-freely-behaving-rat
#7
Daniel Rojas-Líbano, Jonathan Wimmer Del Solar, Marcelo Aguilar-Rivera, Rodrigo Montefusco-Siegmund, Pedro Esteban Maldonado
An important unresolved question about neural processing is the mechanism by which distant brain areas coordinate their activities and relate their local processing to global neural events. A potential candidate for the local-global integration are slow rhythms such as respiration. In this article, we asked if there are modulations of local cortical processing which are phase-locked to (peripheral) sensory-motor exploratory rhythms. We studied rats on an elevated platform where they would spontaneously display exploratory and rest behaviors...
May 16, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29766591/bilateral-activations-in-operculo-insular-area-show-temporal-dissociation-after-peripheral-electrical-stimulation-in-healthy-adults
#8
Pekka Hautasaari, Harri Saloranta, Andrej M Savić, Katariina Korniloff, Urho M Kujala, Ina M Tarkka
Interhemispheric transfer is necessary for sensory integration and coordination of body sides. We studied how somatosensory input from one body side may reach both body sides. First, we investigated with 17 healthy adults which uni- and bilateral brain areas were involved in consecutive stages of automatic sensory processing of non-nociceptive peripheral stimulation. Somatosensory evoked fields (SEFs) to electrical stimulation were recorded with 306-channel magnetoencephalography in two conditions. First, SEFs were registered following sensory radial nerve (RN) stimulation to dorsal surface of the right hand and second, following median nerve (MN) stimulation at the right wrist...
May 15, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29765411/skin-derived-stem-cells-for-wound-treatment-using-cultured-epidermal-autografts-clinical-applications-and-challenges
#9
REVIEW
Inga Brockmann, Juliet Ehrenpfordt, Tabea Sturmheit, Matthias Brandenburger, Charli Kruse, Marietta Zille, Dorothee Rose, Johannes Boltze
The human skin fulfills important barrier, sensory, and immune functions-all of which contribute significantly to health and organism integrity. Widespread skin damage requires immediate treatment and coverage because massive skin loss fosters the invasion of pathogens, causes critical fluid loss, and may ultimately lead to death. Since the skin is a highly immunocompetent organ, autologous transplants are the only viable approach to permanently close a widespread skin wound. Despite the development of tissue-saving autologous transplantation techniques such as mesh and Meek grafts, treatment options for extensive skin damage remain severely limited...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29761601/postnatal-development-of-cholinergic-input-to-the-thalamic-reticular-nucleus-of-the-mouse
#10
Guela Sokhadze, Peter Whitney Campbell, William Guido
The thalamic reticular nucleus (TRN), a shell-like structure comprised of GABAergic neurons, gates signal transmission between thalamus and cortex. While TRN is innervated by axon collaterals of thalamocortical and corticothalamic neurons, other ascending projections modulate activity during different behavioral states such as attention, arousal, and sleep-wake cycles. One of the largest arise from cholinergic neurons of the basal forebrain and brainstem. Despite its integral role, little is known about how or when cholinergic innervation and synapse formation occurs...
May 14, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29758189/audiovisual-perception-in-amblyopia-a-review-and-synthesis
#11
REVIEW
Michael D Richards, Herbert C Goltz, Agnes M F Wong
Amblyopia is a common developmental sensory disorder that has been extensively and systematically investigated as a unisensory visual impairment. However, its effects are increasingly recognized to extend beyond vision to the multisensory domain. Indeed, amblyopia is associated with altered cross-modal interactions in audiovisual temporal perception, audiovisual spatial and motion perception, and audiovisual speech perception. Furthermore, although the visual impairment in amblyopia is typically unilateral, the multisensory abnormalities tend to persist even when viewing with both eyes...
May 11, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29757142/autistic-traits-but-not-schizotypy-predict-increased-weighting-of-sensory-information-in-bayesian-visual-integration
#12
Povilas Karvelis, Aaron R Seitz, Stephen M Lawrie, Peggy Seriès
Recent theories propose that schizophrenia/schizotypy and autistic spectrum disorder are related to impairments in Bayesian inference i.e. how the brain integrates sensory information (likelihoods) with prior knowledge. However existing accounts fail to clarify: i) how proposed theories differ in accounts of ASD vs. schizophrenia and ii) whether the impairments result from weaker priors or enhanced likelihoods. Here, we directly address these issues by characterizing how 91 healthy participants, scored for autistic and schizotypal traits, implicitly learned and combined priors with sensory information...
May 14, 2018: ELife
https://www.readbyqxmd.com/read/29754901/nocte-is-required-for-integrating-light-and-temperature-inputs-in-circadian-clock-neurons-of-drosophila
#13
Chenghao Chen, Min Xu, Yuto Anantaprakorn, Mechthild Rosing, Ralf Stanewsky
Circadian clocks organize biological processes to occur at optimized times of day and thereby contribute to overall fitness. While the regular daily changes of environmental light and temperature synchronize circadian clocks, extreme external conditions can bypass the temporal constraints dictated by the clock. Despite advanced knowledge about how the daily light-dark changes synchronize the clock, relatively little is known with regard to how the daily temperature changes influence daily timing and how temperature and light signals are integrated...
May 8, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29754434/ontogeny-of-gonadotropin-inhibitory-hormone-gnih-in-the-cichlid-fish-cichlasoma-dimerus
#14
María P Di Yorio, Julieta E Sallemi, Francisco J Toledo Solís, Daniela I Pérez Sirkin, Tomás H Delgadin, Kazuyoshi Tsutsui, Paula G Vissio
RFamide peptides are expressed in the early stages of development in most vertebrates. Gonadotropin-inhibitory hormone (GnIH) belongs to the RFamide family, and its role in reproduction has been widely studied in adult vertebrates, ranging from fish to mammals. As only three reports evaluated GnIH during development, the aim of this study was to characterise the ontogeny of GnIH in a fish model, Cichlasoma dimerus. We detected the presence of two GnIH-immunoreactive (GnIH-ir) cell clusters with spatial and temporal differences...
May 13, 2018: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29754115/delusional-misidentifications-in-a-procrustean-bed
#15
EDITORIAL
G N Christodoulou, M Margariti, N Christodoulou
The Delusional Misidentification Syndromes (DMSs) are characterized by defective integration of the normally The Delusional Misidentification Syndromes (DMSs) are characterized by defective integration of the normally fused functions of perception and recognition. The classical sub-types are: the syndromes of Capgras, Fregoli,Intermetamorphosis (mentioned in 3) and Subjective doubles. These syndromes occur in a clear sensorium and shouldbe differentiated from the banal transient misidentifications occurring in confusional states and in mania and from thenon-delusional misidentifications (e...
January 2018: Psychiatrikē, Psychiatriki
https://www.readbyqxmd.com/read/29751242/local-functional-connectivity-alterations-in-schizophrenia-bipolar-disorder-and-major-depressive-disorder
#16
Yange Wei, Miao Chang, Fay Y Womer, Qian Zhou, Zhiyang Yin, Shengnan Wei, Yifang Zhou, Xiaowei Jiang, Xudong Yao, Jia Duan, Ke Xu, Xi-Nian Zuo, Yanqing Tang, Fei Wang
BACKGROUND: Local functional connectivity (FC) indicates local or short-distance functional interactions and may serve as a neuroimaging marker to investigate the human brain connectome. Local FC alterations suggest a disrupted balance in the local functionality of the whole brain network and are increasingly implicated in schizophrenia (SZ), bipolar disorder (BD), and major depressive disorder (MDD). METHODS: We aim to examine the similarities and differences in the local FC across SZ, BD, and MDD...
April 10, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29750263/independent-early-and-late-sensory-processes-for-proprioceptive-integration-when-planning-a-step
#17
Anahid H Saradjian, Normand Teasdale, Jean Blouin, Laurence Mouchnino
Somatosensory inputs to the cortex undergo an early and a later stage of processing which are characterized by an early and a late somatosensory evoked potentials (SEP). The early response is highly representative of the stimulus characteristics whereas the late response reflects a more integrative, task specific, stage of sensory processing. We hypothesized that the later processing stage is independent of the early processing stage. We tested the prediction that a reduction of the first volley of input to the cortex should not prevent the increase of the late SEP...
May 10, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29744703/a-comparison-of-a-behavioral-feeding-intervention-with-and-without-pre-meal-sensory-integration-therapy
#18
Laura Seiverling, Kisha Anderson, Christine Rogan, Christina Alaimo, Paul Argott, Julio Panora
This study compared a behavioral feeding intervention with and without pre-meal sensory integration therapy (SIT) in two boys with autism spectrum disorder and severe food selectivity. For both participants, child bite and drink consumption and total intake increased to similar levels with corresponding decreases in inappropriate mealtime behavior (IMB) in both conditions. The SIT condition was then discontinued and both participants continued to exhibit high levels of bite and drink consumption with corresponding low levels of IMB during a non-SIT phase...
May 9, 2018: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/29742027/dendritic-ca2-dynamics-and-multi-modal-processing-in-a-cricket-antennal-interneuron
#19
Timothy George Bayley, Berthold Hedwig
The integration of stimuli of different modalities is fundamental to information processing within the nervous system. A descending interneuron in the cricket brain, with prominent dendrites in the deutocerebrum, receives input from three sensory modalities: touch of the antennal flagellum, strain of the antennal base, and visual stimulation. Using calcium imaging, we demonstrate that each modality drives a Ca2+ increase in a different dendritic region. Moreover, touch of the flagellum is represented in a topographic map along the neuron's dendrites...
May 9, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29742021/neck-muscle-spindle-noise-biases-reaches-in-a-multi-sensory-integration-task
#20
Parisa Abedi Khoozani, Gunnar Blohm
Reference frame Transformations (RFTs) are crucial components of sensorimotor transformations in the brain. Stochasticity in RFTs has been suggested to add noise to the transformed signal due to variability in transformation parameter estimates (e.g. angle) as well as the stochastic nature of computations in spiking networks of neurons. Here, we varied the RFT angle together with the associated variability and evaluated the behavioral impact in a reaching task that required variability-dependent visual-proprioceptive multi-sensory integration...
May 9, 2018: Journal of Neurophysiology
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