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Sensorimotor integration

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https://www.readbyqxmd.com/read/28713189/the-animal-sensorimotor-organization-a-challenge-for-the-environmental-complexity-thesis
#1
Fred Keijzer, Argyris Arnellos
Godfrey-Smith's environmental complexity thesis (ECT) is most often applied to multicellular animals and the complexity of their macroscopic environments to explain how cognition evolved. We think that the ECT may be less suited to explain the origins of the animal bodily organization, including this organization's potentiality for dealing with complex macroscopic environments. We argue that acquiring the fundamental sensorimotor features of the animal body may be better explained as a consequence of dealing with internal bodily-rather than environmental complexity...
2017: Biology & Philosophy
https://www.readbyqxmd.com/read/28712570/electron-microscopic-reconstruction-of-functionally-identified-cells-in-a-neural-integrator
#2
Ashwin Vishwanathan, Kayvon Daie, Alexandro D Ramirez, Jeff W Lichtman, Emre R F Aksay, H Sebastian Seung
Neural integrators are involved in a variety of sensorimotor and cognitive behaviors. The oculomotor system contains a simple example, a hindbrain neural circuit that takes velocity signals as inputs and temporally integrates them to control eye position. Here we investigated the structural underpinnings of temporal integration in the larval zebrafish by first identifying integrator neurons using two-photon calcium imaging and then reconstructing the same neurons through serial electron microscopic analysis...
July 10, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28703919/cingulate-and-cerebellar-beta-oscillations-are-engaged-in-the-acquisition-of-auditory-motor-sequences
#3
María Herrojo Ruiz, Burkhard Maess, Eckart Altenmüller, Gabriel Curio, Vadim V Nikulin
Singing, music performance, and speech rely on the retrieval of complex sounds, which are generated by the corresponding actions and are organized into sequences. It is crucial in these forms of behavior that the serial organization (i.e., order) of both the actions and associated sounds be monitored and learned. To investigate the neural processes involved in the monitoring of serial order during the initial learning of sensorimotor sequences, we performed magnetoencephalographic recordings while participants explicitly learned short piano sequences under the effect of occasional alterations of auditory feedback (AAF)...
July 13, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28694153/caffeinated-energy-drink-intake-modulates-motor-circuits-at-rest-before-and-after-a-movement
#4
Carmen Concerto, Carmenrita Infortuna, Eileen Chusid, Diego Coira, Jacqueline Babayev, Rowan Metwaly, Hesam Naenifard, Eugenio Aguglia, Fortunato Battaglia
Energy drinks are thought to improve certain aspects of athletic and cognitive performances. Moreover, less is understood about physiological mechanisms that might underlie these effects. The aim of this study was to examine the influence of sugar-free energy drink (SFED) ingestion on corticomotor excitability and plasticity. Fourteen college students consumed a commercially available SFED or a "dummy" drink. By using Transcranial magnetic Stimulation (TMS) we investigated resting motor threshold (RMT), motor evoked potential (MEP) amplitude and cortical silent period (CSP)...
July 8, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28689758/white-matter-microstructure-predicts-cognitive-training-induced-improvements-in-attention-and-executive-functioning-in-schizophrenia
#5
Karuna Subramaniam, Jeevit Gill, Melissa Fisher, Pratik Mukherjee, Srikantan Nagarajan, Sophia Vinogradov
We examined the relationship between white matter microstructure in schizophrenia using diffusion tensor imaging (DTI) and cognitive improvements induced by 70h (~16weeks) of cognitive training. We measured anatomical connectivity in 48 patients with schizophrenia (SZ) and 28 healthy control participants (HC) at baseline, and then examined the relationship between anatomical connectivity at baseline and training-induced cognitive gains in 30 SZ who performed diffusion imaging after completing 70h of training...
July 6, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28689295/inhibitory-rtms-applied-on-somatosensory-cortex-in-wilson-s-disease-patients-with-hand-dystonia
#6
Pierre Lozeron, Aurélia Poujois, Elodie Meppiel, Sana Masmoudi, Thierry Peron Magnan, Eric Vicaut, Emmanuel Houdart, Jean-Pierre Guichard, Jean-Marc Trocello, France Woimant, Nathalie Kubis
Hand dystonia is a common complication of Wilson's disease (WD), responsible for handwriting difficulties and disability. Alteration of sensorimotor integration and overactivity of the somatosensory cortex have been demonstrated in dystonia. This study investigated the immediate after effect of an inhibitory repetitive transcranial magnetic stimulation (rTMS) applied over the somatosensory cortex on the writing function in WD patients with hand dystonia. We performed a pilot prospective randomized double-blind sham-controlled crossover rTMS study...
July 8, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28683024/brain-imaging-of-pain-sensitization-in-patients-with-knee-osteoarthritis
#7
Jesus Pujol, Gerard Martínez-Vilavella, Jone Llorente-Onaindia, Ben J Harrison, Marina López-Solà, Marina López-Ruiz, Laura Blanco-Hinojo, Pere Benito, Joan Deus, Jordi Monfort
A relevant aspect in osteoarthritic pain is neural sensitization. This phenomenon involves augmented responsiveness to painful stimulation and may entail a clinically worse prognosis. We used functional MRI (fMRI) to study pain sensitization in patients with knee osteoarthritis. Sixty patients were recruited and pain sensitization was clinically defined on the basis of regional spreading of pain (spreading sensitization) and increased pain response to repeated stimulation (temporal summation). fMRI testing involved assessing brain responses to both pressure and heat stimulation...
July 3, 2017: Pain
https://www.readbyqxmd.com/read/28680396/botulinum-neurotoxin-a-injected-ipsilaterally-or-contralaterally-into-the-striatum-in-the-rat-6-ohda-model-of-unilateral-parkinson-s-disease-differently-affects-behavior
#8
Veronica A Antipova, Carsten Holzmann, Oliver Schmitt, Andreas Wree, Alexander Hawlitschka
Parkinson's disease (PD) is one of the most frequent neurodegenerative disorders. The loss of dopaminergic neurons in the substantia nigra leads to a disinhibition of cholinergic interneurons in the striatum. Pharmacotherapeutical strategies of PD-related hypercholinism have numerous adverse side effects. We previously showed that ipsilateral intrastriatal injections of 1 ng in unilaterally 6-hydroxydopamine (6-OHDA)-lesioned rats inhibit apomorphine-induced rotation behavior significantly up to 6 months. In this study, we extended the behavioral testing of ipsilateral botulinum neurotoxin A (BoNT-A)-injection and additionally investigated the impact of intrastriatal BoNT-A-injections contralateral to the 6-OHDA-lesioned hemisphere on the basal ganglia circuity and motor functions...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28679843/restricted-vision-increases-sensorimotor-cortex-involvement-in-human-walking
#9
Anderson S Oliveira, Bryan R Schlink, William David Hairston, Peter Konig, Daniel Perry Ferris
This study aimed to determine if there are electrocortical evidence of augmented participation of sensory brain areas on walking modulation during walking with eyes closed. Healthy subjects (n=10) walked on a treadmill at 1 m/s while alternating 5 minutes walking with the eyes open or closed while we recorded ground reaction forces (GRF) and high-density scalp electroencephalography (EEG). We applied independent component analysis to parse EEG signals into maximally independent component (IC) processes and then computed equivalent current dipoles for each IC...
July 5, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28677413/high-intensity-chronic-stroke-motor-imagery-neurofeedback-training-at-home-three-case-reports
#10
Catharina Zich, Stefan Debener, Clara Schweinitz, Annette Sterr, Joost Meekes, Cornelia Kranczioch
Motor imagery (MI) with neurofeedback has been suggested as promising for motor recovery after stroke. Evidence suggests that regular training facilitates compensatory plasticity, but frequent training is difficult to integrate into everyday life. Using a wireless electroencephalogram (EEG) system, we implemented a frequent and efficient neurofeedback training at the patients' home. Aiming to overcome maladaptive changes in cortical lateralization patterns we presented a visual feedback, representing the degree of contralateral sensorimotor cortical activity and the degree of sensorimotor cortex lateralization...
July 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28674168/connectome-wide-phenotypical-and-genotypical-associations-in-focal-dystonia
#11
Stefan Fuertinger, Kristina Simonyan
Isolated focal dystonia is a debilitating movement disorder of unknown pathophysiology. Early studies in focal dystonias have pointed to segregated changes in brain activity and connectivity. Only recently, the notion that dystonia pathophysiology may lie in abnormalities of large-scale brain networks appeared in the literature. Here, we outline a novel concept of functional connectome-wide alterations that are linked to dystonia phenotype and genotype. Using a neural community detection strategy and graph theoretical analysis of functional fMRI data in human patients with the laryngeal form of dystonia (LD) and healthy controls (both males and females), we identified an abnormally widespread hub formation in dystonia, which particularly affected the primary sensorimotor and parietal cortices and thalamus...
July 3, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28671953/clinical-assessment-and-three-dimensional-movement-analysis-an-integrated-approach-for-upper-limb-evaluation-in-children-with-unilateral-cerebral-palsy
#12
Lisa Mailleux, Ellen Jaspers, Els Ortibus, Cristina Simon-Martinez, Kaat Desloovere, Guy Molenaers, Katrijn Klingels, Hilde Feys
INTRODUCTION: The clinical application of upper limb (UL) three-dimensional movement analysis (3DMA) in children with unilateral cerebral palsy (uCP) remains challenging, despite its benefits compared to conventional clinical scales. Moreover, knowledge on UL movement pathology and how this relates to clinical parameters remains scarce. Therefore, we investigated UL kinematics across different manual ability classification system (MACS) levels and explored the relation between clinical and kinematic parameters in children with uCP...
2017: PloS One
https://www.readbyqxmd.com/read/28669907/centre-surround-organization-of-fast-sensorimotor-integration-in-human-motor-hand-area
#13
Raffaele Dubbioso, Estelle Raffin, Anke Karabanov, Axel Thielscher, Hartwig Roman Siebner
Using the short-latency afferent inhibition (SAI) paradigm, transcranial magnetic stimulation (TMS) of the primary motor hand area (M1HAND) can probe how sensory input from limbs modulates corticomotor output in humans. Here we applied a novel TMS mapping approach to chart the spatial representation of SAI in human hand-knob. We hypothesized SAI is somatotopically expressed in M1HAND depending on both the site of peripheral electrical nerve stimulation and the cortical spot targeted by TMS within M1HAND. The left index or little finger was stimulated 23 ms before focal single-pulse TMS of the right M1HAND...
June 29, 2017: NeuroImage
https://www.readbyqxmd.com/read/28656475/gravity-and-neuronal-adaptation-in-vitro-and-in-vivo-from-neuronal-cells-up-to-neuromuscular-responses-a-first-model
#14
REVIEW
Florian P M Kohn, Ramona Ritzmann
For decades it has been shown that acute changes in gravity have an effect on neuronal systems of human and animals on different levels, from the molecular level to the whole nervous system. The functional properties and gravity-dependent adaptations of these system levels have been investigated with no or barely any interconnection. This review summarizes the gravity-dependent adaptation processes in human and animal organisms from the in vitro cellular level with its biophysical properties to the in vivo motor responses and underlying sensorimotor functions of human subjects...
June 27, 2017: European Biophysics Journal: EBJ
https://www.readbyqxmd.com/read/28642168/the-posterior-parietal-cortex-as-integrative-hub-for-whisker-sensorimotor-information
#15
REVIEW
Hemanth Mohan, Roel de Haan, Huibert D Mansvelder, Christiaan P J de Kock
Our daily life consists of a continuous interplay between incoming sensory information and outgoing motor plans. Particularly during goal-directed behavior and active exploration of the sensory environment, brain circuits are merging sensory and motor signals. This is referred to as sensorimotor integration and is relevant for locomotion, vision or tactile exploration. The somatosensory (tactile) system is an attractive modality to study sensorimotor integration in health and disease, motivated by the need for revolutionary technology that builds upon conceptual understanding of sensorimotor integration, such as brain-machine-interfaces and neuro-prosthetics...
June 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28638331/monosynaptic-stretch-reflex-fails-to-explain-the-initial-postural-response-to-sudden-lateral-perturbations
#16
Andreas Mühlbeier, Christian Puta, Kim J Boström, Heiko Wagner
Postural reflexes are essential for locomotion and postural stability, and may play an important role in the etiology of chronic back pain. It has recently been theoretically predicted, and with the help of unilateral perturbations of the trunk experimentally confirmed that the sensorimotor control must lower the reflex amplitude for increasing reflex delays to maintain spinal stability. The underlying neuromuscular mechanism for the compensation of postural perturbations, however, is not yet fully understood...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28625539/investigating-the-effects-of-maximal-anaerobic-fatigue-on-dynamic-postural-control-using-the-y-balance-test
#17
William Johnston, Kara Dolan, Niamh Reid, Garrett F Coughlan, Brian Caulfield
OBJECTIVES: The Y Balance Test is one of the most commonly used dynamic balance assessments, providing an insight into the integration of the sensorimotor subsystems. In recent times, there has been an increase in interest surrounding it's use in various clinical populations demonstrating alterations in motor function. Therefore, it is important to examine the effect physiological influences such as fatigue play in dynamic postural control, and establish a timeframe for its recovery. DESIGN: Descriptive laboratory study...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28625081/integration-of-action-and-size-perception-through-practice
#18
Alexandre Coutte, Thomas Camus, Loïc Heurley, Denis Brouillet
Size perception is known to influence our usual interactions with environment. Numerous studies highlighted that during the visual presentation of an object, the properties of manual actions vary as a function of this object's size. In order to better understand the dynamic variations of relationships between size perception and action, we used an experimental paradigm consisting in two phases. During a previous implicit learning phase, a manual response (right or left) was specifically associated with the appearance of a large or small stimulus...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/28619653/on-optimal-spatial-filtering-for-the-detection-of-phase-coupling-in-multivariate-neural-recordings
#19
G Waterstraat, G Curio, V V Nikulin
INTRODUCTION: Neuronal oscillations synchronize processing in the brain over large spatiotemporal scales and thereby facilitate integration of individual functional modules. Up to now, the relation between the phases of neuronal oscillations and behavior or perception has mainly been analyzed in sensor space of multivariate EEG/MEG recordings. However, sensor-space analysis distorts the topographies of the underlying neuronal sources and suffers from low signal-to-noise ratio. Instead, we propose an optimized source reconstruction approach (Phase Coupling Optimization, PCO)...
June 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28615080/locomotor-circumvention-strategies-are-altered-by-stroke-ii-postural-coordination
#20
Anuja Darekar, Anouk Lamontagne, Joyce Fung
BACKGROUND: Locomotor strategies for obstacle circumvention require appropriate postural coordination that depends on sensorimotor integration within the central nervous system. It is not known how these strategies are affected by a stroke. The objective of this study was to contrast postural coordination strategies used for obstacle circumvention between post-stroke participants (n = 12) and healthy controls (n = 12). METHODS: Participants walked towards a target in a virtual environment (11 × 8 m room) with cylindrical obstacles that were stationary or approaching from head-on, or diagonally 30° left/right...
June 15, 2017: Journal of Neuroengineering and Rehabilitation
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