journal
MENU ▼
Read by QxMD icon Read
search

Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale

journal
https://www.readbyqxmd.com/read/30022260/expectation-of-movement-generates-contrasting-changes-in-multifinger-synergies-in-young-and-older-adults
#1
Mitchell Tillman, Satyajit Ambike
Anticipatory synergy adjustment (ASA) is a feed-forward control mechanism that describes a continuous decrease in the stability of the current motor state beginning about 150 ms prior to a state transition. Recently, we described an associated phenomenon in which the system stability was reduced solely in response to a cue that generates an expectation of a state change, independent of whether the state change actually occurs. Both phenomena are of the same kind (stability reduction), but evoked by distinct antecedent conditions...
July 18, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/30019235/fast-periodic-visual-stimulation-to-study-tool-selective-processing-in-the-human-brain
#2
Roxane De Keyser, André Mouraux, Genevieve L Quek, Diana M Torta, Valéry Legrain
Because tools are manipulated for the purpose of action, they are often considered to be a specific object category that associates perceptual and motor properties. Their neural processing has been studied extensively by comparing the cortical activity elicited by the separate presentation of tool and non-tool objects, assuming that observed differences are solely due to activity selective for processing tools. Here, using a fast periodic visual stimulation (FPVS) paradigm, we isolated EEG activity selectively related to the processing of tool objects embedded in a stream of non-tool objects...
July 18, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/30019234/balance-in-multiple-sclerosis-relationship-to-central-brain-regions
#3
Richard L Doty, Michael R MacGillivray, Hussam Talab, Isabelle Tourbier, Megan Reish, Sherrie Davis, Jennifer L Cuzzocreo, Neil T Shepard, Dzung L Pham
Dizziness, postural instability, and ataxia are among the most debilitating symptoms of multiple sclerosis (MS), reflecting, in large part, dysfunctional integration of visual, somatosensory, and vestibular sensory cues. However, the role of MS-related supratentorial lesions in producing such symptoms is poorly understood. In this study, motor control test (MCT) and dynamic sensory organization test (SOT) scores of 58 MS patients were compared to those of 72 healthy controls; correlations were determined between the MS scores of 49 patients and lesion volumes within 26 brain regions...
July 17, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/30003295/how-do-reaching-and-walking-costs-affect-movement-path-selection
#4
Cory Adam Potts, Chloe Callahan-Flintoft, David A Rosenbaum
Although reaching and walking are commonly coordinated, their coordination has been little studied. We investigated decision-making related to reaching and walking in connection with a recently discovered phenomenon called pre-crastination-the tendency to expend extra effort in the service of hastening goal or sub-goal completion. In the earlier studies where pre-crastination was discovered, participants decided which of two buckets to carry to the end of a walkway, picking the bucket they thought was easier...
July 12, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29998350/sound-frequency-affects-the-auditory-motion-onset-response-in-humans
#5
Mikaella Sarrou, Pia Marlena Schmitz, Nicole Hamm, Rudolf Rübsamen
The current study examines the modulation of the motion-onset response based on the frequency-range of sound stimuli. Delayed motion-onset and stationary stimuli were presented in a free-field by sequentially activating loudspeakers on an azimuthal plane keeping the natural percept of externalized sound presentation. The sounds were presented in low- or high-frequency ranges and had different motion direction within each hemifield. Difference waves were calculated by contrasting the moving and stationary sounds to isolate the motion-onset responses...
July 11, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29995200/-it-ain-t-what-you-do-it-s-the-way-that-you-do-it-does-obesity-affect-perceptual-motor-control-ability-of-adults-on-the-speed-and-accuracy-of-a-discrete-aiming-task
#6
David Gaul, Laure Fernandez, Johann Issartel
The ability to control speed and accuracy of goal directed aiming tasks underpins many activities of daily living. Recent evidence has begun to suggest that obesity can affect the control of movement. This study evaluated perceptual motor control of 183 normal weight, overweight, and obese participants using a discrete Fitts' task on a digital tablet. In addition, we manipulated tablet orientation to determine whether tablet orientation influences task difficulty with the view to increase the task's constraints...
July 11, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29987537/a-jugular-vein-compression-collar-prevents-alterations-of-endogenous-electrocortical-dynamics-following-blast-exposure-during-special-weapons-and-tactical-swat-breacher-training
#7
Scott Bonnette, Jed A Diekfuss, Adam W Kiefer, Michael A Riley, Kim D Barber Foss, Staci Thomas, Christopher A DiCesare, Weihong Yuan, Jonathan Dudley, Amit Reches, Gregory D Myer
Exposure to explosive blasts places one at risk for traumatic brain injury, especially for special weapons and tactics (SWAT) and military personnel, who may be repeatedly exposed to blasts. In the current study, the effectiveness of a jugular vein compression collar to prevent alterations in resting-state electrocortical activity following a single-SWAT breacher training session was investigated. SWAT team personnel were randomly assigned to wear a compression collar during breacher training and resting state electroencephalography (EEG) was measured within 2 days prior to and two after breacher training...
July 10, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29980823/small-world-indices-via-network-efficiency-for-brain-networks-from-diffusion-mri
#8
Lan Lin, Zhenrong Fu, Cong Jin, Miao Tian, Shuicai Wu
The small-world architecture has gained considerable attention in anatomical brain connectivity studies. However, how to adequately quantify small-worldness in diffusion networks has remained a problem. We addressed the limits of small-world measures and defined new metric indices: the small-world efficiency (SWE) and the small-world angle (SWA), both based on the tradeoff between high global and local efficiency. To confirm the validity of the new indices, we examined the behavior of SWE and SWA of networks based on the Watts-Strogatz model as well as the diffusion tensor imaging (DTI) data from 75 healthy old subjects (aged 50-70)...
July 6, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29974148/supportive-effect-of-interferential-current-stimulation-on-susceptibility-of-swallowing-in-guinea-pigs
#9
Toshiro Umezaki, Yoichiro Sugiyama, Shinya Fuse, Shigeyuki Mukudai, Shigeru Hirano
Sensory-motor control of the pharyngeal swallow requires sensory afferent inputs from the pharynx and larynx evoked by introducing bolus into the pharynx. Patients with reduced sensitivity of the pharynx and larynx are likely to have a swallowing impairment, such as pre-swallow aspiration due to delayed swallow triggering. Interferential current stimulation applied to the neck is thought to improve the swallowing function of dysphagic patients, although the mechanism underlying the facilitatory effect of such stimulation remains unknown...
July 4, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29974147/coherence-in-general-and-personal-semantic-knowledge-functional-differences-of-the-posterior-and-centro-parietal-n400-erp-component
#10
Benjamin Schöne, Moritz Köster, Thomas Gruber
A growing body of scientific literature investigated the difference between general and personal semantic knowledge. In contrast to general world knowledge, personal semantics comprises highly individual knowledge about oneself. The present study aimed to differentiate processes of integration into personal as opposed to general semantic knowledge. For that purpose, participants were presented with pictures of themselves (Self-condition) or unknown persons (Other-condition) superimposed on a congruent or incongruent background...
July 4, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29974146/the-influence-of-obstacles-on-grasp-planning
#11
Isabelle T Garzorz, Alexander G Knorr, Rene Gilster, Heiner Deubel
When reaching to grasp for an object in the absence of obstacles, the choice of contact points is highly consistent within and between healthy humans, suggesting a preplanning of grasping movements (Gilster et al. in Exp Brain Res 217:137-151, 2012). In real life, objects may obstruct the favored contact points at a target object, requiring adjustments to avoid collision. In the present study, we investigated how an obstacle that directly obstructs the favored contact points for two-digit grasping changes the planning and execution of reach-to-grasp movements...
July 4, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29971454/changes-in-sensorimotor-network-activation-after-botulinum-toxin-type-a-injections-in-patients-with-cervical-dystonia-a-functional-mri-study
#12
Martin Nevrlý, Petr Hluštík, Pavel Hok, Pavel Otruba, Zbyněk Tüdös, Petr Kaňovský
Botulinum toxin type A (BoNT) is considered an effective therapeutic option in cervical dystonia (CD). The pathophysiology of CD and other focal dystonias has not yet been fully explained. Results from neurophysiological and imaging studies suggest a significant involvement of the basal ganglia and thalamus, and functional abnormalities in premotor and primary sensorimotor cortical areas are considered a crucial factor in the development of focal dystonias. Twelve BoNT-naïve patients with CD were examined with functional MRI during a skilled hand motor task; the examination was repeated 4 weeks after the first BoNT injection to the dystonic neck muscles...
July 3, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29968178/random-amplitude-sinusoidal-linear-acceleration-causes-greater-vestibular-modulation-of-skin-sympathetic-nerve-activity-than-constant-amplitude-acceleration
#13
Elie Hammam, Thomas P Knellwolf, Kwok-Shing Wong, Kenny Kwok, Vaughan G Macefield
We tested the hypothesis that random variations in the magnitude of sinusoidal linear acceleration cause greater modulation of skin sympathetic nerve activity (SSNA), but not muscle sympathetic nerve activity (MSNA), than sinusoidal stimuli of the same frequency but constant amplitude. Subjects (n = 22) were seated in a sealed room mounted on a linear motor that could deliver peak sinusoidal accelerations of 30 mG in the antero-posterior direction. Subjects sat on a padded chair with their neck and head supported vertically, thereby minimizing somatosensory cues, facing the direction of motion in the anterior direction...
July 2, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29961087/properties-of-short-latency-responses-in-the-upper-limbs-evoked-by-axial-impulses-during-leaning-evidence-for-reticulospinal-projections
#14
Niroshan Jeyakumar, Sendhil Govender, James G Colebatch
We studied the short-latency (SL) effects of postural perturbations produced by impulses applied over the spine of the C7 vertebra or the sternum ("axial impulses") in 12 healthy subjects. EMG recordings were made bilaterally from the triceps brachii, biceps brachii, soleus, and tibialis anterior muscles, and unilaterally from the deltoid, forearm flexors, forearm extensors, and first dorsal interosseous (FDI) muscles. Sternal impulses evoked short-latency responses in the biceps when subjects leaned posteriorly to support approximately 12% of their body weight with the arms, but these responses were only modestly larger than for isometric contraction of the arms (26...
June 30, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29959452/attention-orienting-near-the-hand-following-performed-and-imagined-actions
#15
John P Garza, Catherine L Reed, Ralph J Roberts
Recent studies have documented that the hand's ability to perform actions affects the visual processing and attention for objects near the hand, suggesting that actions may have specific effects on visual orienting. However, most research on the relation between spatial attention and action focuses on actions as responses to visual attention manipulations. The current study examines visual attention immediately following an executed or imagined action. A modified spatial cuing paradigm tested whether a brief, lateralized hand-pinch performed by a visually hidden hand near the target location, facilitated or inhibited subsequent visual target detection...
June 29, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29951904/training-children-aged-5-10-years-in-compliance-control-tracing-smaller-figures-yields-better-learning-not-specific-to-the-scale-of-drawn-figures
#16
Winona Snapp-Childs, Aaron J Fath, Geoffrey P Bingham
Previously we developed a method that supports active movement generation to allow practice with improvement of good compliance control in tracing and drawing. We showed that the method allowed children with motor impairments to improve at a 3D tracing task to become as proficient as typically developing children and that the training improved 2D figure copying. In this study, we expanded the training protocol to include a wider variety of ages (5-10-year-olds) and we made the figures traced in training the same as in figure copying, but varied the scale of training and copying figures to assess the generality of learning...
June 27, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29943239/the-effects-of-transcranial-alternating-current-stimulation-tacs-at-individual-alpha-peak-frequency-iapf-on-motor-cortex-excitability-in-young-and-elderly-adults
#17
Shane Fresnoza, Monica Christova, Theresa Feil, Eugen Gallasch, Christof Körner, Ulrike Zimmer, Anja Ischebeck
Transcranial alternating current stimulation (tACS) can modulate brain oscillations, cortical excitability and behaviour. In aging, the decrease in EEG alpha activity (8-12 Hz) in the parieto-occipital and mu rhythm in the motor cortex are correlated with the decline in cognitive and motor functions, respectively. Increasing alpha activity using tACS might therefore improve cognitive and motor function in the elderly. The present study explored the influence of tACS on cortical excitability in young and old healthy adults...
June 26, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29936533/speed-but-not-amplitude-of-visual-feedback-exacerbates-force-variability-in-older-adults
#18
Changki Kim, Basma Yacoubi, Evangelos A Christou
Magnification of visual feedback (VF) impairs force control in older adults. In this study, we aimed to determine whether the age-associated increase in force variability with magnification of visual feedback is a consequence of increased amplitude or speed of visual feedback. Seventeen young and 18 older adults performed a constant isometric force task with the index finger at 5% of MVC. We manipulated the vertical (force gain) and horizontal (time gain) aspect of the visual feedback so participants performed the task with the following VF conditions: (1) high amplitude-fast speed; (2) low amplitude-slow speed; (3) high amplitude-slow speed...
June 23, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29934780/satiety-induced-enhanced-neuronal-activity-in-the-frontal-operculum-relates-to-the-desire-for-food-in-the-obese-female-brain
#19
Saurabh Kumar, Felicitas Grundeis, Cristin Brand, Han-Jeong Hwang, Jan Mehnert, Burkhard Pleger
In the present pilot study, we questioned how eating to satiety affects cognitive influences on the desire for food and corresponding neuronal activity in the obese female brain. During EEG recording, lean (n = 10) and obese women (n = 10) self-rated the ability to reappraise visually presented food. All women were measured twice, when hungry and after eating to satiety. After eating to satiety, reappraisal of food was easier than when being hungry. Comparing the EEG data of the sated to the hungry state, we found that only in obese women the frontal operculum was involved not only in the reappraisal of food but also in admitting the desire for the same food...
June 22, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29931569/the-habitual-motor-vertical-of-humans-depends-on-gravicentric-and-egocentric-cues-but-only-little-on-visual-cues
#20
Nils Bury, Otmar Bock
Many studies have evaluated the interplay of gravicentric, egocentric, and visual cues for our perception of the vertical, but little is known about their interplay for motor control. Thirty-five participants flipped a switch "down" in experimental conditions which systematically varied body posture (upright; tilted 45° left-ear-down), visually indicated vertical (absent; aligned with the long body axis; rotated 45° counterclockwise with respect to the long body axis), and egocentric tactile information provided by a handhold (absent; present)...
June 22, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
journal
journal
21299
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"