keyword
MENU ▼
Read by QxMD icon Read
search

Visuomotor

keyword
https://www.readbyqxmd.com/read/29304417/spectral-and-temporal-electroencephalography-measures-reveal-distinct-neural-networks-for-the-acquisition-consolidation-and-interlimb-transfer-of-motor-skills-in-healthy-young-adults
#1
M P Veldman, N M Maurits, M A M Nijland, N E Wolters, J C Mizelle, T Hortobágyi
OBJECTIVE: Plasticity of the central nervous system likely underlies motor learning. It is however unclear, whether plasticity in cortical motor networks is motor learning stage-, activity-, or connectivity-dependent. METHODS: From electroencephalography (EEG) data, we quantified effective connectivity by the phase slope index (PSI), neuronal activity by event-related desynchronization, and sensorimotor integration by N30 during the stages of visuomotor skill acquisition, consolidation, and interlimb transfer...
December 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29282617/crus-i-in-the-rodent-cerebellum-its-homology-to-crus-i-and-ii-in-the-primate-cerebellum-and-its-anatomical-uniqueness-among-neighboring-lobules
#2
REVIEW
Izumi Sugihara
In the human cerebellum, the crus I and crus II lobules (or the ansiform lobule), which are implicated in cognitive and visuomotor functions, are significantly expanded compared to other anterior and posterior lobules, which are involved mainly in somatosensorimotor function. In applying rodent models, it is essential to identify the lobules that are homologous to human crus I and crus II. Observation of the lobular structure in human, macaque, marmoset, rat, and mouse has indicated that human crus I and II are homologous to crus I in rodents (referred to as "ansiform area, AA")...
December 27, 2017: Cerebellum
https://www.readbyqxmd.com/read/29274105/neural-predictors-of-sensorimotor-adaptation-rate-and-savings
#3
Kaitlin Cassady, Marit Ruitenberg, Vincent Koppelmans, Patricia Reuter-Lorenz, Yiri De Dios, Nichole Gadd, Scott Wood, Roy Riascos Castenada, Igor Kofman, Jacob Bloomberg, Ajitkumar Mulavara, Rachael Seidler
In this study, we investigate whether individual variability in the rate of visuomotor adaptation and multiday savings is associated with differences in regional gray matter volume and resting-state functional connectivity. Thirty-four participants performed a manual adaptation task during two separate test sessions, on average 9 days apart. Functional connectivity strength between sensorimotor, dorsal cingulate, and temporoparietal regions of the brain was found to predict the rate of learning during the early phase of the adaptation task...
December 23, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29259545/neuromodulation-of-prefrontal-cortex-in-non-human-primates-by-dopaminergic-receptors-during-rule-guided-flexible-behavior-and-cognitive-control
#4
REVIEW
Susheel Vijayraghavan, Alex J Major, Stefan Everling
The prefrontal cortex (PFC) is indispensable for several higher-order cognitive and executive capacities of primates, including representation of salient stimuli in working memory (WM), maintenance of cognitive task set, inhibition of inappropriate responses and rule-guided flexible behavior. PFC networks are subject to robust neuromodulation from ascending catecholaminergic systems. Disruption of these systems in PFC has been implicated in cognitive deficits associated with several neuropsychiatric disorders...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/29243004/altered-effective-connectivity-contributes-to-micrographia-in-patients-with-parkinson-s-disease-and-freezing-of-gait
#5
Evelien Nackaerts, Alice Nieuwboer, Sanne Broeder, Stephan Swinnen, Wim Vandenberghe, Elke Heremans
Recently, it was shown that patients with Parkinson's disease (PD) and freezing of gait (FOG) can also experience freezing episodes during handwriting and present writing problems outside these episodes. So far, the neural networks underlying increased handwriting problems in subjects with FOG are unclear. This study used dynamic causal modeling of fMRI data to investigate neural network dynamics underlying freezing-related handwriting problems and how these networks changed in response to visual cues. Twenty-seven non-freezers and ten freezers performed a pre-writing task with and without visual cues in the scanner with their right hand...
December 14, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29241535/strict-independence-of-parallel-and-poly-synaptic-axon-target-matching-during-visual-reflex-circuit-assembly
#6
Tania A Seabrook, Onkar S Dhande, Nao Ishiko, Victoria P Wooley, Phong L Nguyen, Andrew D Huberman
The use of sensory information to drive specific behaviors relies on circuits spanning long distances that wire up through a range of axon-target recognition events. Mechanisms assembling poly-synaptic circuits and the extent to which parallel pathways can "cross-wire" to compensate for loss of one another remain unclear and are crucial to our understanding of brain development and models of regeneration. In the visual system, specific retinal ganglion cells (RGCs) project to designated midbrain targets connected to downstream circuits driving visuomotor reflexes...
December 12, 2017: Cell Reports
https://www.readbyqxmd.com/read/29235143/allostatic-load-but-not-medical-burden-predicts-memory-performance-in-late-life-bipolar-disorder
#7
REVIEW
Sophie R Vaccarino, Tarek K Rajji, Ariel G Gildengers, Sarah E S Waters, Meryl A Butters, Mahesh Menon, Daniel M Blumberger, Aristotle N Voineskos, Dielle Miranda, Benoit H Mulsant
OBJECTIVE: Older patients with bipolar disorder (BD) present with variable degrees of cognitive impairment. Over time, stress, mood episodes, and comorbidities increase the body's allostatic load. We assessed the extent to which allostatic load vs more traditional measures of medical burden account for the heterogeneity in cognition in this population. METHODS: Thirty-five older euthymic patients with BD and 30 age-equated, gender-equated, and education-equated comparison participants were administered a comprehensive assessment including a neuropsychological battery, and 9 physiological measures to determine allostatic load...
December 13, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/29228119/rostro-caudal-connectional-heterogeneity-of-the-dorsal-part-of-the-macaque-prefrontal-area-46
#8
Elena Borra, Carolina Giulia Ferroni, Marzio Gerbella, Valentina Giorgetti, Chiara Mangiaracina, Stefano Rozzi, Giuseppe Luppino
Based on neural tracer injections we found evidence for 3 connectionally distinct sectors of the dorsal part of the macaque prefrontal area 46 (46d), located at different rostro-caudal levels. Specifically, a rostral sector displayed an almost exclusive and extensive intraprefrontal connectivity and extraprefrontal connections limited to superior temporal areas and the caudal cingulate area 31. Conversely, both a middle and a caudal sector were characterized by robust, topographically organized connections with parietal and frontal sensorimotor areas...
December 8, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29224981/visuomotor-mental-rotation-of-a-saccade-the-contingent-negative-variation-scales-to-the-angle-of-rotation
#9
Matthew Heath, Francisco L Colino, Jillian Chan, Olave E Krigolson
The visuomotor mental rotation (VMR) of a saccade requires a response to a region of space that is dissociated from a stimulus by a pre-specified angle, and work has shown a monotonic increase in reaction times as a function of increasing oblique angles of rotation. These results have been taken as evidence of a continuous process of rotation and have generated competing hypotheses. One hypothesis asserts that rotation is mediated via frontoparietal structures, whereas a second states that a continuous shift in the activity of direction-specific neurons in the superior colliculus (SC) supports rotation...
December 7, 2017: Vision Research
https://www.readbyqxmd.com/read/29216478/reach-and-grasp-deficits-following-damage-to-the-dorsal-pulvinar
#10
Melanie Wilke, Lukas Schneider, Adan-Ulises Dominguez-Vargas, Carsten Schmidt-Samoa, Kristina Miloserdov, Ahmad Nazzal, Peter Dechent, Yuranny Cabral-Calderin, Hansjörg Scherberger, Igor Kagan, Mathias Bähr
Expansion of the dorsal pulvinar in humans and its anatomical connectivity suggests its involvement in higher-order cognitive and visuomotor functions. We investigated visuomotor performance in a 31 year old patient (M.B.) with a lesion centered on the medial portion of the dorsal pulvinar (left > right) due to an atypical Sarcoidosis manifestation. Unlike lesions with a vascular etiology, the lesion of M.B. did not include primary sensory or motor thalamic nuclei. Thus, this patient gave us the exceedingly rare opportunity to study the contribution of the dorsal pulvinar to visuomotor behavior in a human without confounding losses in primary sensory or motor domains...
November 8, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29214390/changes-in-motor-performance-and-mental-workload-during%C3%A2-practice-of-reaching-movements-a-team-dynamics-perspective
#11
Isabelle M Shuggi, Patricia A Shewokis, Jeffrey W Herrmann, Rodolphe J Gentili
Few investigations have examined mental workload during motor practice or learning in a context of team dynamics. This study examines the underlying cognitive-motor processes of motor practice by assessing the changes in motor performance and mental workload during practice of reaching movements. Individuals moved a robotic arm to reach targets as fast and as straight as possible while satisfying the task requirement of avoiding a collision between the end-effector and the workspace limits. Individuals practiced the task either alone (HA group) or with a synthetic teammate (HRT group), which regulated the effector velocity to help satisfy the task requirements...
December 6, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29213051/a-robot-aided-visuo-motor-training-that-improves-proprioception-and-spatial-accuracy-of-untrained-movement
#12
Naveen Elangovan, Leonardo Cappello, Lorenzo Masia, Joshua Aman, Jürgen Konczak
Proprioceptive function can become enhanced during motor learning. Yet, we have incomplete knowledge to what extent proprioceptive function is trainable and how a training that enhances proprioception may influence performance in untrained motor skills. To address this knowledge gap, healthy young adults (N = 14) trained in a visuomotor task that required learners to make increasingly accurate wrist movements. Using a robotic exoskeleton coupled with a virtual visual environment, participants tilted a virtual table through continuous wrist flexion/extension movements with the goal to position a rolling ball on table into a target...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29212925/done-in-100-ms-path-dependent-visuomotor-transformation-in-the-human-upper-limb
#13
Chao Gu, J Andrew Pruszynski, Paul L Gribble, Brian D Corneil
A core assumption underlying mental chronometry is that more complex tasks increase cortical processing, prolonging reaction times. Here we show that increases in task complexity alter the magnitude, rather than the latency, of the output for a circuit that rapidly transforms visual information into motor actions. We quantified visual stimulus-locked responses (SLRs), which are changes in upper limb muscle recruitment that evolve at a fixed latency ~100 ms after novel visual stimulus onset. First, we studied the underlying reference frame of the SLR, by dissociating initial eye and hand position...
December 6, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29209829/adaptation-to-proprioceptive-targets-following-visuomotor-adaptation
#14
Jenna C Flannigan, Ruth J Posthuma, Jesse N Lombardo, Chelsea Murray, Erin K Cressman
In the following study, we asked if reaches to proprioceptive targets are updated following reach training with a gradually introduced visuomotor perturbation. Subjects trained to reach with distorted hand-cursor feedback, such that they saw a cursor that was rotated or translated relative to their actual hand movement. Following reach training trials with the cursor, subjects reached to Visual (V), Proprioceptive (P) and Visual + Proprioceptive (VP) targets with no visual feedback of their hand. Comparison of reach endpoints revealed that reaches to VP targets followed similar trends as reaches to P targets, regardless of the training distortion introduced...
December 5, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29204112/flexible-visuomotor-associations-in-touchscreen-control
#15
Sara Fabbri, Luc P J Selen, Robert J van Beers, W P Medendorp
To move real objects, our hand needs to get in direct physical contact with the object. However, this is not necessarily the case when interacting with virtual objects, for example when displacing objects on tablets by swipe movements. Here, we performed two experiments to study the behavioral strategies of these movements, examining how visual information about the virtual object is mapped into a swipe that moves the object into a goal location. In the first experiment, we investigated how swiping behavior depends on whether objects were located within or outside the swiping workspace...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29201639/visual-feedback-alters-force-control-and-functional-activity-in-the-visuomotor-network-after-stroke
#16
Derek B Archer, Nyeonju Kang, Gaurav Misra, Shannon Marble, Carolynn Patten, Stephen A Coombes
Modulating visual feedback may be a viable option to improve motor function after stroke, but the neurophysiological basis for this improvement is not clear. Visual gain can be manipulated by increasing or decreasing the spatial amplitude of an error signal. Here, we combined a unilateral visually guided grip force task with functional MRI to understand how changes in the gain of visual feedback alter brain activity in the chronic phase after stroke. Analyses focused on brain activation when force was produced by the most impaired hand of the stroke group as compared to the non-dominant hand of the control group...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29187320/progressive-practice-promotes-motor-learning-and-repeated-transient-increases-in-corticospinal-excitability-across-multiple-days
#17
L Christiansen, M J Madsen, E Bojsen-Møller, R Thomas, J B Nielsen, J Lundbye-Jensen
BACKGROUND: A session of motor skill learning is accompanied by transient increases in corticospinal excitability(CSE), which are thought to reflect acute changes in neuronal connectivity associated with improvements in sensorimotor performance. Factors influencing changes in excitability and motor skill with continued practice remain however to be elucidated. OBJECTIVE/HYPOTHESIS: Here we investigate the hypothesis that progressive motor practice during consecutive days can induce repeated transient increases in corticospinal excitability and promote motor skill learning...
November 13, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29180610/functional-organization-and-dynamic-activity-in-the-superior-colliculus-of-the-echolocating-bat-eptesicus-fuscus
#18
Melville J Wohlgemuth, Ninad B Kothari, Cynthia F Moss
Sensory-guided behaviors require the transformation of sensory information into task-specific motor commands. Prior research on sensorimotor integration has emphasized visuomotor processes in the context of simplified orienting movements in controlled laboratory tasks, rather than an animal's more complete, natural behavioral repertoire. Here, we conducted a series of neural recording experiments in the midbrain superior colliculus (SC) of echolocating bats engaged in a sonar target-tracking task that invoked dynamic active sensing behaviors...
November 27, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29176570/population-scale-organization-of-cerebellar-granule-neuron-signaling-during-a-visuomotor-behavior
#19
Sherika J G Sylvester, Melanie M Lee, Alexandro D Ramirez, Sukbin Lim, Mark S Goldman, Emre R F Aksay
Granule cells at the input layer of the cerebellum comprise over half the neurons in the human brain and are thought to be critical for learning. However, little is known about granule neuron signaling at the population scale during behavior. We used calcium imaging in awake zebrafish during optokinetic behavior to record transgenically identified granule neurons throughout a cerebellar population. A significant fraction of the population was responsive at any given time. In contrast to core precerebellar populations, granule neuron responses were relatively heterogeneous, with variation in the degree of rectification and the balance of positive versus negative changes in activity...
November 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29167637/variations-in-static-force-control-and-motor-unit-behavior-with-error-amplification-feedback-in-the-elderly
#20
Yi-Ching Chen, Linda L Lin, Yen-Ting Lin, Chia-Ling Hu, Ing-Shiou Hwang
Error amplification (EA) feedback is a promising approach to advance visuomotor skill. As error detection and visuomotor processing at short time scales decline with age, this study examined whether older adults could benefit from EA feedback that included higher-frequency information to guide a force-tracking task. Fourteen young and 14 older adults performed low-level static isometric force-tracking with visual guidance of typical visual feedback and EA feedback containing augmented high-frequency errors...
2017: Frontiers in Human Neuroscience
keyword
keyword
69688
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"