journal
Journals Experimental Brain Research. E...

Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale

https://read.qxmd.com/read/39012475/a-10-min-reduction-in-cerebral-blood-flow-does-not-alter-post-intervention-executive-function-evidence-from-lower-body-negative-pressure
#1
JOURNAL ARTICLE
James Van Riesen, Mustafa Shirzad, Chloe Edgar, Benjamin Tari, Matthew Heath
A single bout of exercise as well as exposure to a hypercapnic environment increases cerebral blood flow (CBF) and is an adaptation linked to a post-intervention executive function (EF) benefit. In the present investigation we sought to determine whether a transient reduction in CBF impairs EF. Accordingly, we employed 10-min -30 mmHg and  -50 mmHg lower-body negative pressure (LBNP) interventions as well as a non-LBNP control condition. LBNP was employed because it sequesters blood in the lower legs and safely and reliably decreases CBF...
July 16, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/39012474/reduction-in-motor-error-by-presenting-subthreshold-somatosensory-information-during-visuomotor-tracking-tasks
#2
JOURNAL ARTICLE
Toshiaki Wasaka, Shota Kano, Yoshifumi Morita
Weak sensory noise acts on the nervous system and promotes sensory and motor functions. This phenomenon is called stochastic resonance and is expected to be applied for improving biological functions. This study investigated the effect of electrical stimulation on grip force adjustment ability. The coefficient of variation and absolute motor error in grip force was measured during a visuomotor tracking task under different intensities of somatosensory noise. Depending on the style of force exertion, the grip movement used in the visuomotor tracking task consisted of force generation (FG), force relaxation (FR), and constant contraction (Constant) phases...
July 16, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/39012473/multidimensional-regularity-processing-in-music-an-examination-using-redundant-signals-effect
#3
JOURNAL ARTICLE
Kai Ishida, Hiroshi Nittono
Music is based on various regularities, ranging from the repetition of physical sounds to theoretically organized harmony and counterpoint. How are multidimensional regularities processed when we listen to music? The present study focuses on the redundant signals effect (RSE) as a novel approach to untangling the relationship between these regularities in music. The RSE refers to the occurrence of a shorter reaction time (RT) when two or three signals are presented simultaneously than when only one of these signals is presented, and provides evidence that these signals are processed concurrently...
July 16, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38995369/correction-unveiling-the-invisible-receivers-use-object-weight-cues-for-grip-force-planning-in-handover-actions
#4
L Kopnarski, J Rudisch, D F Kutz, C Voelcker-Rehage
No abstract text is available yet for this article.
July 12, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38992203/two-aspects-of-feed-forward-control-of-action-stability-effects-of-action-speed-and-unexpected-events
#5
JOURNAL ARTICLE
Sayan Deep De, Satyajit Ambike, Mark L Latash
We explored two types of anticipatory synergy adjustments (ASA) during accurate four-finger total force production task. The first type is a change in the index of force-stabilizing synergy during a steady state when a person is expecting a signal to produce a quick force change, which is seen even when the signal does not come (steady-state ASA). The other type is the drop in in the synergy index prior to a planned force change starting at a known time (transient ASA). The subjects performed a task of steady force production at 10% of maximal voluntary contraction (MVC) followed by a ramp to 20% MVC over 1 s, 3 s, and as a step function (0 s)...
July 11, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38980340/modeling-kinematic-variability-reveals-displacement-and-velocity-based-dual-control-of-saccadic-eye-movements
#6
JOURNAL ARTICLE
Varsha Vasudevan, Aditya Murthy, Radhakant Padhi
Noise is a ubiquitous component of motor systems that leads to behavioral variability of all types of movements. Nonetheless, systems-based models investigating human movements are generally deterministic and explain only the central tendencies like mean trajectories. In this paper, a novel approach to modeling kinematic variability of movements is presented and tested on the oculomotor system. This approach reconciles the two prominent philosophies of saccade control: displacement-based control versus velocity-based control...
July 9, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38980339/local-activation-of-cb1-receptors-by-synthetic-and-endogenous-cannabinoids-dampens-burst-firing-mode-of-reticular-thalamic-nucleus-neurons-in-rats-under-ketamine-anesthesia
#7
JOURNAL ARTICLE
Carlos A Aguirre-Rodríguez, Alfonso Delgado, Alberto Alatorre, Aldo Oviedo-Chávez, José R Martínez-Escudero, Rafael Barrientos, Enrique Querejeta
The reticular thalamic nucleus (RTN) is a thin shell that covers the dorsal thalamus and controls the overall information flow from the thalamus to the cerebral cortex through GABAergic projections that contact thalamo-cortical neurons (TC). RTN neurons receive glutamatergic afferents fibers from neurons of the sixth layer of the cerebral cortex and from TC collaterals. The firing mode of RTN neurons facilitates the generation of sleep-wake cycles; a tonic mode or desynchronized mode occurs during wake and REM sleep and a burst-firing mode or synchronized mode is associated with deep sleep...
July 9, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38970654/hd-tdcs-to-the-lateral-occipital-complex-improves-haptic-object-recognition
#8
JOURNAL ARTICLE
Laura Cacciamani, Daniel Tomer, Mary Grace Mylod-Vargas, Aaron Selcov, Grace A Peterson, Christopher I Oseguera, Aidan Barbieux
High-definition transcranial direct current stimulation (HD-tDCS) is a non-invasive brain stimulation technique that has been shown to be safe and effective in modulating neuronal activity. The present study investigates the effect of anodal HD-tDCS on haptic object perception and memory through stimulation of the lateral occipital complex (LOC), a structure that has been shown to be involved in both visual and haptic object recognition. In this single-blind, sham-controlled, between-subjects study, blindfolded healthy, sighted participants used their right (dominant) hand to perform haptic discrimination and recognition tasks with 3D-printed, novel objects called "Greebles" while receiving 20 min of 2 milliamp (mA) anodal stimulation (or sham) to the left or right LOC...
July 6, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38970653/frontal-striatal-glucose-metabolism-and-fatigue-in-patients-with-multiple-sclerosis-long-covid-and-covid-19-recovered-controls
#9
JOURNAL ARTICLE
Thorsten Rudroff
This study compared brain glucose metabolism using FDG-PET in the caudate nucleus, putamen, globus pallidus, thalamus, and dorsolateral prefrontal cortex (DLPFC) among patients with Long COVID, patients with fatigue, people with multiple sclerosis (PwMS) patients with fatigue, and COVID recovered controls. PwMS exhibited greater hypometabolism compared to long COVID patients with fatigue and the COVID recovered control group in all studied brain areas except the globus pallidus (effect size range 0.7-1.5). The results showed no significant differences in glucose metabolism between patients with Long COVID and the COVID recovered control group in these regions...
July 6, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38963561/rare-incompatible-stimuli-evoke-visual-mismatch-negativity-in-a-flanker-task
#10
JOURNAL ARTICLE
Kota Suzuki
In the flanker task, the behavioral performance for incompatible stimuli is worse in the mostly compatible (rare) condition than in the equiprobable condition. Furthermore, incompatible stimuli evoke visual mismatch negativity (VMMN) when comparing the rare and equiprobable conditions. Compatible and incompatible stimuli differ in terms of their shape and type. This study aimed to examine whether VMMN evoked by rare incompatible stimuli were associated with the shape or type of the stimulus. In a modified version of the flanker task, stimuli were manipulated by two shapes (typical or peculiar) and two types (compatible or incompatible): typical compatible stimuli (< <  <  <  < and >  >  >  > >), typical incompatible stimuli (> >  <  >  > and <  <  >  < <), peculiar compatible stimuli (+ <  <  <  + and +  >  >  > +), and peculiar incompatible stimuli (+ >  <  >  + and +  <  >  < +)...
July 4, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38963560/scalp-acupuncture-guidance-for-identifying-the-optimal-site-for-transcranial-electrical-stimulation-of-the-hand
#11
JOURNAL ARTICLE
Hao Meng, Michael Houston, Gerard E Francisco, Yingchun Zhang, Sheng Li
Transcranial electrical stimulation (tES) often targets the EEG-guided C3/C4 area that may not accurately represent M1 for hand muscles. This study aimed to determine if the neuroanatomy-based scalp acupuncture-guided site (AC) was a more effective spot than the C3 site for neuromodulation. Fifteen healthy subjects received one 20-minute session of high-definition transcranial alternating current stimulation (HD-tACS) intervention (20 Hz at 2 mA) at the AC or C3 sites randomly with a 1-week washout period...
July 4, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38963559/context-dependent-reduction-in-corticomuscular-coupling-for-balance-control-in-chronic-stroke-survivors
#12
JOURNAL ARTICLE
Komal K Kukkar, Nishant Rao, Diana Huynh, Sheel Shah, Jose L Contreras-Vidal, Pranav J Parikh
Balance control is an important indicator of mobility and independence in activities of daily living. How the functional coupling between the cortex and the muscle for balance control is affected following stroke remains to be known. We investigated the changes in coupling between the cortex and leg muscles during a challenging balance task over multiple frequency bands in chronic stroke survivors. Fourteen participants with stroke and ten healthy controls performed a challenging balance task. They stood on a computerized support surface that was either fixed (low difficulty condition) or sway-referenced with varying gain (medium and high difficulty conditions)...
July 4, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38963558/evidence-of-bottom-up-homeostatic-modulation-induced-tavns-during-emotional-and-go-no-go-tasks
#13
JOURNAL ARTICLE
Lucas Camargo, Kevin Pacheco-Barrios, Anna Carolyna Gianlorenço, Maryela Menacho, Hyuk Choi, Jae-Jun Song, Felipe Fregni
Bilateral transcutaneous auricular vagus nerve stimulation (taVNS) - a non-invasive neuromodulation technique - has been investigated as a safe and feasible technique to treat many neuropsychiatric conditions. such as epilepsy, depression, anxiety, and chronic pain. Our aim is to investigate the effect of taVNS on neurophysiological processes during emotional and Go/No-Go tasks, and changes in frontal alpha asymmetry. We performed a randomized, double-blind, sham-controlled trial with 44 healthy individuals who were allocated into two groups (the active taVNS group and the sham taVNS group)...
July 4, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38958722/perceptual-decoupling-in-the-sustained-attention-to-response-task-is-unlikely
#14
JOURNAL ARTICLE
Aman Bedi, Paul N Russell, William S Helton
Researchers dispute the cause of errors in high Go, low No Go target detection tasks, like the Sustained Attention to Response Task (SART). Some researchers propose errors in the SART are due to perceptual decoupling, where a participant is unaware of stimulus identity. This lack of external awareness causes an erroneous response. Other researchers suggest the majority of the errors in the SART are instead due to response leniency, not perceptual decoupling. Response delays may enable a participant who is initially unaware of stimulus identity, perceptually decoupled, to become aware of stimulus identity, or perceptually recoupled...
July 3, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38953973/the-influence-of-travel-time-on-perceived-traveled-distance-varies-by-spatiotemporal-scale
#15
JOURNAL ARTICLE
Cindy Jagorska, Martin Riemer
The influence of travel time on perceived traveled distance has often been studied, but the results are inconsistent regarding the relationship between the two magnitudes. We argue that this is due to differences in the lengths of investigated travel distances and hypothesize that the influence of travel time differs for rather short compared to rather long traveled distances. We tested this hypothesis in a virtual environment presented on a desktop as well as through a head-mounted display. Our results show that, for longer distances, more travel time leads to longer perceived distance, while we do not find an influence of travel time on shorter distances...
July 2, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38949687/frontal-cortex-neurometabolites-and-mobility-in-older-adults-a-preliminary-study
#16
JOURNAL ARTICLE
Nikou Nikoumanesh, Colleen J Chase, Rajakumar Nagarajan, Katie Potter, Douglas N Martini
BACKGROUND: The frontal cortex, relevant to global cognition and motor function, is recruited to compensate for mobility dysfunction in older adults. However, the in vivo neurophysiological (e.g., neurometabolites) underpinnings of the frontal cortex compensation for mobility dysfunction remain poorly understood. The purpose of this study was to investigate the relationships among frontal cortex neurophysiology, mobility, and cognition in healthy older adults. METHODS: Magnetic Resonance Spectroscopy (MRS) quantified N-acetylasparate (tNAA) and total choline (tCho) concentrations and ratios in the frontal cortex in 21 older adults...
June 29, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38940961/metaplastic-neuromodulation-via-transcranial-direct-current-stimulation-has-no-effect-on-corticospinal-excitability-and-neuromuscular-fatigue
#17
JOURNAL ARTICLE
Madison R Boda, Lavender A Otieno, Ashleigh E Smith, Mitchell R Goldsworthy, Simranjit K Sidhu
Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation tool with potential for managing neuromuscular fatigue, possibly due to alterations in corticospinal excitability. However, inconsistencies in intra- and inter- individual variability responsiveness to tDCS limit its clinical use. Emerging evidence suggests harnessing homeostatic metaplasticity induced via tDCS may reduce variability and boost its outcomes, yet little is known regarding its influence on neuromuscular fatigue in healthy adults...
June 28, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38935089/hdac6-modulates-the-cognitive-behavioral-function-and-hippocampal-tissue-pathological-changes-of-app-ps1-transgenic-mice-through-hsp90-hsf1-pathway
#18
JOURNAL ARTICLE
Bingyi Wang, Siyu Liu, Kaimin Hao, YaruWang Wang, Zongjing Li, Yuanyuan Lou, Yuan Chang, Wenxiu Qi
The aim of this study was to investigate histone deacetylase 6 (HDAC6) modifies the heat shock protein 90 (HSP90) and heat shock transcription factor 1 (HSF1) affect the levels of pathological markers such as Aβ oligomers (Aβo) and Tau phosphorylation (p-Tau) in APP/PS1 double transgenic mice hippocampal tissues or HT22 neurons as well as the changes in cognitive behavioral functions of mice. (1) APP/PS1 transgenic mice (6 months old, 25 ~ 30 g) were randomly assigned to 5 experimental groups, C57BL/6J mice (6 months old, 25 ~ 30 g) were used as 4 control groups, with 8 mice in each group...
June 27, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38918211/contribution-of-external-reference-frame-to-tactile-localization
#19
JOURNAL ARTICLE
Shunsuke Otsuka, Han Gao, Koichi Hiraoka
The purpose of the present study was to elucidate whether an external reference frame contributes to tactile localization in blindfolded healthy humans. In a session, the right forearm was passively moved until the elbow finally reached to the target angle, and participants reached the left index finger to the right middle fingertip. The locus of the right middle fingertip indicated by the participants deviated in the direction of the elbow extension when vibration was provided to the biceps brachii muscle during the passive movement...
June 25, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://read.qxmd.com/read/38916760/explaining-the-influence-of-practice-on-the-grooved-pegboard-times-of-older-adults-role-of-force-steadiness
#20
JOURNAL ARTICLE
Sajjad Daneshgar, Taylor Tvrdy, Roger M Enoka
The purpose was to identify the variables that can explain the variance in the grooved pegboard times of older adults categorized as either fast or slow performers. Participants (n = 28; 60-83 years) completed two experimental sessions, before and after 6 practice sessions of the grooved pegboard test. The 2 groups were identified based on average pegboard times during the practice sessions. Average pegboard time during practice was 73 ± 11 s for the fast group and 85 ± 13 s for the slow group...
June 25, 2024: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
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