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https://www.readbyqxmd.com/read/28737256/insula-based-networks-in-professional-musicians-evidence-for-increased-functional-connectivity-during-resting-state-fmri
#1
Anna M Zamorano, Ignacio Cifre, Pedro Montoya, Inmaculada Riquelme, Boris Kleber
Despite considerable research on experience-dependent neuroplasticity in professional musicians, detailed understanding of an involvement of the insula is only now beginning to emerge. We investigated the effects of musical training on intrinsic insula-based connectivity in professional classical musicians relative to nonmusicians using resting-state functional MRI. Following a tripartite scheme of insula subdivisions, coactivation profiles were analyzed for the posterior, ventral anterior, and dorsal anterior insula in both hemispheres...
July 24, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28735922/prevalence-of-restless-legs-syndrome-and-associated-factors-in-an-otherwise-healthy-population-results-from-the-danish-blood-donor-study
#2
Maria Didriksen, Andreas S Rigas, Richard P Allen, Brendan J Burchell, Emanuele Di Angelantonio, Maria H Nielsen, Poul Jennum, Thomas Werge, Christian Erikstrup, Ole B Pedersen, Mie T Bruun, Kristoffer S Burgdorf, Erik Sørensen, Henrik Ullum
OBJECTIVE: Restless legs syndrome (RLS) is a neurological sensorimotor disorder characterized by uncomfortable sensations in the legs. RLS often occurs as a comorbid condition. Besides an increased risk of iron deficiency, blood donors are considered to be generally healthy. Blood donors are therefore an ideal population for studying factors associated with RLS occurrence, herein the role of iron. It is suggested that RLS is linked to sex, age, low socioeconomic status, unhealthy lifestyle, and iron deficiency...
August 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28735921/frontal-dysfunction-in-patients-with-restless-legs-syndrome-performing-a-visual-oddball-task-an-event-related-potential-source-imaging-study
#3
Kwang Su Cha, Jeong Woo Choi, Ki-Young Jung, Kyung Hwan Kim
Restless legs syndrome (RLS) is a sensorimotor neurological disorder that is accompanied by the compelling urge to move one's legs, and unpleasant, disturbing sensations in the legs. Several neuropsychological studies have shown that RLS is associated with deficits in cognitive functions, such as attention, working memory, and frontal executive function, presumably due to abnormal frontal activities. However, the mechanism underlying the cognitive deficits in RLS patients is mostly unknown. To investigate the cortical origin of cognitive dysfunction in RLS, we analyzed the P2 and P3 event-related potential (ERP) components evoked by a visual oddball task using distributed cortical source localization via low-resolution brain electromagnetic tomography (LORETA) algorithm...
August 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28735746/parallel-inhibitory-and-excitatory-trigemino-facial-feedback-circuitry-for-reflexive-vibrissa-movement
#4
Marie-Andrée Bellavance, Jun Takatoh, Jinghao Lu, Maxime Demers, David Kleinfeld, Fan Wang, Martin Deschênes
Animals employ active touch to optimize the acuity of their tactile sensors. Prior experimental results and models lead to the hypothesis that sensory inputs are used in a recurrent manner to tune the position of the sensors. A combination of electrophysiology, intersectional genetic viral labeling and manipulation, and classical tracing allowed us to identify second-order sensorimotor loops that control vibrissa movements by rodents. Facial motoneurons that drive intrinsic muscles to protract the vibrissae receive a short latency inhibitory input, followed by synaptic excitation, from neurons located in the oralis division of the trigeminal sensory complex...
July 13, 2017: Neuron
https://www.readbyqxmd.com/read/28735381/characterization-of-the-sensorimotor-rhythm-in-4-month-old-infants-born-at-term-and-premature
#5
Milene Roca-Stappung, Minerva Moguel-González, Thalía Fernández, Thalía Harmony, Omar Mendoza-Montoya, José Luis Marroquín, Salvador Ruiz-Correa, Lourdes Díaz-Comas, Gloria Otero-Ojeda
The sensorimotor rhythm (SMR) is an electroencephalographic rhythm associated with motor and cognitive development observed in the central brain regions during wakefulness in the absence of movement, and it reacts contralaterally to generalized and hemibody movements. The purpose of this work was to characterize the SMR of 4-month-old infants, born either healthy at term or prematurely with periventricular leukomalacia (PVL). Two groups of infants were formed: healthy and premature with PVL. Their electroencephalograms (EEGs) were recorded in four conditions: rest, free movement, right-hand grasping and left-hand grasping, in order to explore general reactivity to free movement and contralateral reactivity in hand-grasping conditions...
July 22, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/28735100/attention-modulates-specific-motor-cortical-circuits-recruited-by-transcranial-magnetic-stimulation
#6
J L Mirdamadi, L Y Suzuki, S K Meehan
Skilled performance and acquisition is dependent upon afferent input to motor cortex. The present study used short-latency afferent inhibition (SAI) to probe how manipulation of sensory afference by attention affects different circuits projecting to pyramidal tract neurons in motor cortex. SAI was assessed in the first dorsal interosseous muscle while participants performed a low or high attention demanding visual detection task. SAI was evoked by preceding a suprathreshold transcranial magnetic stimulus with electrical stimulation of the median nerve at the wrist...
July 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28735011/assessment-and-elimination-of-the-effects-of-head-movement-on-meg-resting-state-measures-of-oscillatory-brain-activity
#7
Eirini Messaritaki, Loes Koelewijn, Diana C Dima, Gemma M Williams, Gavin Perry, Krish D Singh
Magnetoencephalography (MEG) is increasingly being used to study brain function because of its excellent temporal resolution and its direct association with brain activity at the neuronal level. One possible cause of error in the analysis of MEG data comes from the fact that participants, even MEG-experienced ones, move their head in the MEG system. Head movement can cause source localization errors during the analysis of MEG data, which can result in the appearance of source variability that does not reflect brain activity...
July 19, 2017: NeuroImage
https://www.readbyqxmd.com/read/28734698/toddlers-show-sensorimotor-activity-during-auditory-verb-processing
#8
Katharina Antognini, Moritz M Daum
Language that describes actions, for instance verbs, can help to predict future actions of conspecifics in social interactions. Language and action are therefore interrelated. This interrelation has been described on a behavioral level for adults and toddlers. Furthermore, in adults, the sensorimotor system is involved in this interrelation. However, little is known about the early interrelation on the neural level at the onset of verb acquisition. In the present study, we examined the role of the sensorimotor system during the processing of acoustically presented verbs that describe dynamic actions and visually presented actions in toddlers, who are in the earliest stage of expressive language development...
July 19, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28734164/cognitive-strategies-in-the-mental-rotation-task-revealed-by-eeg-spectral-power
#9
Aaron L Gardony, Marianna D Eddy, Tad T Brunyé, Holly A Taylor
The classic mental rotation task (MRT; Shepard & Metzler, 1971) is commonly thought to measure mental rotation, a cognitive process involving covert simulation of motor rotation. Yet much research suggests that the MRT recruits both motor simulation and other analytic cognitive strategies that depend on visuospatial representation and visual working memory (WM). In the present study, we investigated cognitive strategies in the MRT using time-frequency analysis of EEG and independent component analysis. We scrutinized sensorimotor mu (µ) power reduction, associated with motor simulation, parietal alpha (pα) power reduction, associated with visuospatial representation, and frontal midline theta (fmθ) power enhancement, associated with WM maintenance and manipulation...
July 19, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28733834/long-term-intensive-gymnastic-training-induced-changes-in-intra-and-inter-network-functional-connectivity-an-independent-component-analysis
#10
Huiyuan Huang, Junjing Wang, Carol Seger, Min Lu, Feng Deng, Xiaoyan Wu, Yuan He, Chen Niu, Jun Wang, Ruiwang Huang
Long-term intensive gymnastic training can induce brain structural and functional reorganization. Previous studies have identified structural and functional network differences between world class gymnasts (WCGs) and non-athletes at the whole-brain level. However, it is still unclear how interactions within and between functional networks are affected by long-term intensive gymnastic training. We examined both intra- and inter-network functional connectivity of gymnasts relative to non-athletes using resting-state fMRI (R-fMRI)...
July 21, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28732761/the-use-of-intermuscular-coherence-analysis-as-a-novel-approach-to-detect-age-related-changes-on-postural-muscle-synergy
#11
Adriana M Degani, Charles T Leonard, Alessander Danna-Dos-Santos
The overall goal of this study was to investigate potential adaptations brought about by the natural processes of aging on the coordination of postural muscles. Considering the progressive and non-homogeneous deterioration of sensorimotor and neuromuscular systems as the individual grows older, it was hypothesized that aging is associated with a reorganization of synergistic mechanisms controlling postural muscles. Therefore, the presence, distribution, and strength of correlated neural inputs to three posterior postural muscles were measured by intermuscular coherence estimations at a low frequency band (0-55Hz)...
July 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28732483/effects-of-dual-task-and-walking-speed-on-gait-variability-in-people-with-chronic-ankle-instability-a-cross-sectional-study
#12
Shmuel Springer, Uri Gottlieb
BACKGROUND: Recent evidence suggests that impaired central sensorimotor integration may contribute to deficits in movement control experienced by people with chronic ankle instability (CAI). This study compared the effects of dual-task and walking speed on gait variability in individuals with and without CAI. METHODS: Sixteen subjects with CAI and 16 age- and gender-matched, able-bodied controls participated in this study. Stride time variability and stride length variability were measured on a treadmill under four different conditions: self-paced walking, self-paced walking with dual-task, fast walking, and fast walking with dual-task...
July 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28729830/resting-state-fluctuations-of-eeg-sensorimotor-rhythm-reflect-bold-activities-in-the-pericentral-areas-a-simultaneous-eeg-fmri-study
#13
Shohei Tsuchimoto, Shuka Shibusawa, Nobuaki Mizuguchi, Kenji Kato, Hiroki Ebata, Meigen Liu, Takashi Hanakawa, Junichi Ushiba
Blockade of the scalp electroencephalographic (EEG) sensorimotor rhythm (SMR) is a well-known phenomenon following attempted or executed motor functions. Such a frequency-specific power attenuation of the SMR occurs in the alpha and beta frequency bands and is spatially registered at primary somatosensory and motor cortices. Here, we hypothesized that resting-state fluctuations of the SMR in the alpha and beta frequency bands also covary with resting-state sensorimotor cortical activity, without involving task-related neural dynamics...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28729058/impacts-of-sensation-perception-and-motor-abilities-of-the-ipsilesional-upper-limb-on-hand-functions-in-unilateral-stroke-quantifications-from-biomechanical-and-functional-perspectives
#14
Hsiu-Yun Hsu, Chia-Wen Ke, Ta-Shen Kuan, Hsiu-Ching Yang, Ching-Liang Tsai, Li-Chieh Kuo
BACKGROUND: The presence of subtle losses in hand dexterity after stroke impacts the regaining of independence with regard to activities of daily living. Therefore, awareness of ipsilesional upper extremity (UE) function may be of importance when drafting a comprehensive rehabilitation program. However, current hand function tests seem to be unable to identify asymptomatic UE impairments. OBJECTIVES: To assess the motor coordination as well as the sensory-perception of an ipsilesional UE using biomechanical analysis of performance-oriented tasks and conducting a Manual Tactile Test (MTT)...
July 17, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28727719/intercostal-neuralgia-occurring-as-a-complication-of-splanchnic-nerve-radiofrequency-ablation-in-a-patient-with-chronic-pancreatitis
#15
Saipriya Tewari, Anil Agarwal, Sujeet K Gautam, Rajashree Madabushi
Our intent is to report a case of intercostal neuralgia occuring as a complication of splanchnic radiofreqency ablation (RFA), due to a breach in the integrity of the insulating sheath of the RFA needle.A 48-year-old man presented to our pain clinic with upper abdominal pain due to chronic pancreatitis, recalcitrant to medical management. We decided to perform bilateral splanchnic nerve RFA in this patient. After confirmation of bilateral correct needle placement under fluoroscopic guidance and sensorimotor testing, RFA was performed on the right side uneventfully...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28724784/representing-delayed-force-feedback-as-a-combination-of-current-and-delayed-states
#16
Guy Avraham, Firas Mawase, Amir Karniel, Lior Shmuelof, Opher Donchin, Ferdinando A Mussa-Ivaldi, Ilana Nisky
To adapt to deterministic force perturbations that depend on the current state of the hand, internal representations are formed to capture the relationships between forces experienced and motion. However, information from multiple modalities travels at different rates, resulting in intermodal delays that require compensation for these internal representations to develop. To understand how these delays are represented by the brain, we presented participants with delayed velocity-dependent force fields; i.e., forces that depend on hand velocity either 70 or 100 ms beforehand...
July 19, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28723837/minimum-effective-volume-of-lidocaine-for-ultrasound-guided-costoclavicular-block
#17
Thitipan Sotthisopha, Maria Francisca Elgueta, Artid Samerchua, Prangmalee Leurcharusmee, Worakamol Tiyaprasertkul, Aida Gordon, Roderick J Finlayson, De Q Tran
BACKGROUND AND OBJECTIVES: This dose-finding study aimed to determine the minimum effective volume in 90% of patients (MEV90) of lidocaine 1.5% with epinephrine 5 μg/mL for ultrasound-guided costoclavicular block. METHODS: Using an in-plane technique and a lateral-to-medial direction, the block needle was positioned in the middle of the 3 cords of the brachial plexus in the costoclavicular space. The entire volume of lidocaine was deposited in this location. Dose assignment was carried out using a biased-coin-design up-and-down sequential method, where the total volume of local anesthetic administered to each patient depended on the response of the previous one...
July 19, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28721394/interhemispheric-disconnectivity-in-the-sensorimotor-network-in-bipolar-disorder-revealed-by-functional-connectivity-and-diffusion-tensor-imaging-analysis
#18
Takuya Ishida, Tomohiro Donishi, Jun Iwatani, Shinichi Yamada, Shun Takahashi, Satoshi Ukai, Kazuhiro Shinosaki, Masaki Terada, Yoshiki Kaneoke
BACKGROUND: Little is known regarding interhemispheric functional connectivity (FC) abnormalities via the corpus callosum in subjects with bipolar disorder (BD), which might be a key pathophysiological basis of emotional processing alterations in BD. METHODS: We performed tract-based spatial statistics (TBSS) using diffusion tensor imaging (DTI) in 24 healthy control (HC) and 22 BD subjects. Next, we analyzed the neural networks with independent component analysis (ICA) in 32HC and 25 BD subjects using resting-state functional magnetic resonance imaging...
June 2017: Heliyon
https://www.readbyqxmd.com/read/28720981/cerebral-reorganization-in-subacute-stroke-survivors-after-virtual-reality-based-training-a-preliminary-study
#19
Xiang Xiao, Qiang Lin, Wai-Leung Lo, Yu-Rong Mao, Xin-Chong Shi, Ryan S Cates, Shu-Feng Zhou, Dong-Feng Huang, Le Li
BACKGROUND: Functional magnetic resonance imaging (fMRI) is a promising method for quantifying brain recovery and investigating the intervention-induced changes in corticomotor excitability after stroke. This study aimed to evaluate cortical reorganization subsequent to virtual reality-enhanced treadmill (VRET) training in subacute stroke survivors. METHODS: Eight participants with ischemic stroke underwent VRET for 5 sections per week and for 3 weeks. fMRI was conducted to quantify the activity of selected brain regions when the subject performed ankle dorsiflexion...
2017: Behavioural Neurology
https://www.readbyqxmd.com/read/28720013/the-5-ht1b-serotonin-receptor-regulates-methylphenidate-induced-gene-expression-in-the-striatum-differential-effects-on-immediate-early-genes
#20
David Alter, Joel A Beverley, Ronak Patel, Carlos A Bolaños-Guzmán, Heinz Steiner
Drug combinations that include a psychostimulant such as methylphenidate (Ritalin) and a selective serotonin reuptake inhibitor such as fluoxetine are indicated in several medical conditions. Co-exposure to these drugs also occurs with "cognitive enhancer" use by individuals treated with selective serotonin reuptake inhibitors. Methylphenidate, a dopamine reuptake inhibitor, by itself produces some addiction-related gene regulation in the striatum. We have demonstrated that co-administration of selective serotonin reuptake inhibitors potentiates these methylphenidate-induced molecular effects, thus producing a more "cocaine-like" profile...
July 1, 2017: Journal of Psychopharmacology
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