Abstract：
:The aim of this study was to examine coherence between surface electromyographic (EMG) signals from two index finger flexor muscles, the first dorsal interosseous (FDI) and flexor digitorum superficialis (FDS), during and immediately following sustained, fatiguing isometric contraction. Coherence was observed between the FDI and FDS EMG signals in the tremor (8-12 Hz), beta (15-35 Hz) and gamma (35-60 Hz) bands in all subjects. A significant increase in EMG-EMG coherence in the beta and gamma frequency bands was observed immediately following the fatiguing contraction. No significant difference was observed in the tremor band coherence before and after fatigue. Coherence was observed between EMG and force in the tremor band during both the pre- and post-fatigue contractions and a significant increase in the FDI EMG-force coherence post-fatigue was observed. It is suggested that the increase in beta and gamma band coherence with fatigue may be due to increased levels of corticomotoneuronal drive to both muscles. Alternatively, the increased EMG-EMG coherence may reflect an increased contribution of peripheral afferents to coupling across the muscle with fatigue. Although the functional significance is not clear, the increase in coherence may help to overcome reduced motoneuron excitability with fatigue, to bind together different sensorimotor elements or to coordinate force generation across muscles in a more synergistic manner as the force generating capacity of the muscle is decreased.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Kattla S,Lowery MMdoi
10.1007/s00221-009-2110-0subject
Has Abstractpub_date
2010-04-01 00:00:00pages
89-99issue
1eissn
0014-4819issn
1432-1106journal_volume
202pub_type
杂志文章abstract：:There are important developmental changes occurring during infancy in visual cortical structures that underlie higher-order perceptual abilities. Using high-density electrophysiological recording techniques, the present study aimed to examine the development of visual mechanisms, during the first year of life, associa...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-007-0854-y
更新日期：2007-06-01 00:00:00
abstract：:The factors controlling neurogenesis and differentiation of olfactory receptor cells in adults are poorly understood, although it is often stated that these cells undergo continual turnover after a predetermined lifespan. An interesting model in which to study mechanisms which control olfactory receptor neurogenesis a...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00247534
更新日期：1988-01-01 00:00:00
abstract：:We studied intermanual motor transfer for right-to-left or left-to-right direction of transfer between either proximal or distal upper extremity muscle groups. The influence of previously acquired motor engrams (original learning, OL) on learning efficiency of the contralateral side (transfer learning, TL) was examine...
journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
doi：10.1007/BF00228105
更新日期：1996-03-01 00:00:00
abstract：:This article investigated both the ability of naive human subjects to learn interval production, as well as the properties of learning generalization across modalities and interval durations that varied systematically from the over-trained interval. Human subjects trained on a 450-, 650-, or 850-ms single-interval pro...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-009-1895-1
更新日期：2009-07-01 00:00:00
abstract：:In everyday life, we often use graphical interfaces where the visual space is mapped to the motor space with a visuomotor gain called the control display gain. One of the key objectives in the field of Human Computer Interaction is to design this control display gain so as to enhance users' performance. Although the c...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-020-05856-1
更新日期：2020-09-01 00:00:00
abstract：:It was previously proposed that a linkage between the optokinetic system and the stereoscopic system in higher mammals serves to allow these animals to selectively stabilize those parts of the visual scene which lie in the plane of convergence as the animals move forward in a three-dimensional world (Howard and Ohmi, ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228902
更新日期：1989-01-01 00:00:00
abstract：:This study compared the mechanisms of adaptation to stable and unstable dynamics from the perspective of changes in joint mechanics. Subjects were instructed to make point to point movements in force fields generated by a robotic manipulandum which interacted with the arm in either a stable or an unstable manner. Afte...
journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
doi：10.1007/s00221-003-1443-3
更新日期：2003-07-01 00:00:00
abstract：:After several days of exposure to optically-imposed post-saccadic retinal slip, the saccades of normal monkeys acquire an exponential ocular drift. This drift is in the direction of the imposed image motion, and persists in the dark. It has been argued that these changes result from the operation of a visually mediate...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00340497
更新日期：1986-01-01 00:00:00
abstract：:The smooth pursuit eye movement system uses retinal information about the image-slip-velocity of the target in order to match the eye-velocity-in-space (i.e., gaze-velocity) to the actual target velocity. To maintain the target image on the fovea during smooth gaze tracking, and to compensate for the long delays invol...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1088-7
更新日期：2002-07-01 00:00:00
abstract：:We had recumbent subjects (n = 7) indicate the amplitude of imposed, passive yaw-axis body rotations in the 0, 1, and 1.8 g background force levels generated during parabolic flight maneuvers. The blindfolded subject, restrained in a cradle, aligned a gravity-neutral pointer with the subjective vertical while in an in...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-009-1785-6
更新日期：2009-05-01 00:00:00
abstract：:The present study tested the idea that the visuomotor systems mediating prehension do not have independent access to pictorial cues processed by perceptual mechanisms. Individuals with visual form agnosia, whose perceptual systems are compromised but who have intact visuomotor control, were examined to determine wheth...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/pl00005731
更新日期：1997-08-01 00:00:00
abstract：: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. ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-018-5329-9
更新日期：2018-10-01 00:00:00
abstract：:The aim of this investigation was to understand the functions of long horizontal connections projecting from area 17 to area 18 in cats. The animals were anesthetized and prepared for recording single-cell responses to sine-wave gratings in area 18. Neuronal activity was analyzed under three conditions: prior to, duri...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/pl00005596
更新日期：1997-03-01 00:00:00
abstract：:Modern tools in technological environments are often characterized by a spatial separation of hand actions (operating a remote control) and their intended action effects (displayed movements of an unmanned vehicle, a robot, or an avatar on a screen). Often non-corresponding proximal and distal movement effects put hig...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-012-3018-7
更新日期：2012-04-01 00:00:00
abstract：:Muscular fatigue, which reduces force output and position sense, often leads to increased sway and potential balance impairments. In contrast, visually-guided saccadic eye movements (saccades) can attenuate sway more than fixating gaze on an external target. The goals of this study were to determine whether the use of...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-018-5384-2
更新日期：2018-12-01 00:00:00
abstract：:We investigated the extent to which humans can quickly adapt their goal-directed arm movements to perturbed feedback. We predicted that the magnitude of adaptation to a changed relationship between vision and kinesthesia would depend on the type of perturbation, being largest when the perturbation can be generalized w...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1321-4
更新日期：2003-02-01 00:00:00
abstract：:In order to investigate the role of mental rotation in the directional control of eye movements, we instructed subjects to make saccades in directions different from that of a visual stimulus (rotated saccades). Saccadic latency increased linearly with the amount of directional transformation imposed between the stimu...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050765
更新日期：1999-06-01 00:00:00
abstract：:This review summarizes anatomical and electrophysiological observations related to corticovestibular interactions as a step toward understanding their possible functions. Vestibular information is represented in at least three distinct regions of the cerebral cortex in cats and monkeys: the parietal and somatosensory ...
journal_title：Experimental brain research
pub_type： 杂志文章,评审
doi：10.1007/pl00005786
更新日期：1997-10-01 00:00:00
abstract：:The present study assessed changes in perceived heaviness of weights lifted by the thumb, index, ring and little fingers during anaesthesia of the "lifting" digit. Subjects (n = 19) lifted weights solely by flexion of the distal joint of the digit, using a bilateral weight-matching paradigm. Changes in perceived heavi...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050247
更新日期：1997-12-01 00:00:00
abstract：:Multisensory integration is known to create a more robust and reliable perceptual representation of one's environment. Specifically, a congruent auditory input can make a visual stimulus more salient, consequently enhancing the visibility and detection of the visual target. However, it remains largely unknown whether ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-016-4591-y
更新日期：2016-05-01 00:00:00
abstract：:Understanding the differences between solo and joint action control is an important goal in psychology. The present study represented a novel approach in which participants performed a bimanual finger oscillation task, either alone or in pairs. It was hypothesized that performance of this task relies heavily on attent...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-018-5420-2
更新日期：2019-01-01 00:00:00
abstract：:The purpose of this study was to test the principle of motor abundance, which has been hypothesized as the principle by which the central nervous system controls the excessive degrees of freedom of the human movements, in contrast to the traditional negative view of motor redundancy. This study investigated the change...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2486-x
更新日期：2011-02-01 00:00:00
abstract：:In this study, we examined the relationship between a measure of cerebral lateralization--differences in tympanic temperature (T(Ty))--and questionnaire measures of inattentiveness and hyperactivity in both people and dogs. Theories of cerebral lateralization indicate that cerebral asymmetry may improve attentive beha...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-012-3093-9
更新日期：2012-06-01 00:00:00
abstract：:The development of the electromyogram (EMG) of tibialis anterior (TA) and medial gastrocnemius (GM) during locomotion was studied in normal rats from the onset of quadruped walking (postnatal day 10, P10) until P42. The objectives were to relate signal properties of the EMG and coordination of muscle activity to funct...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229036
更新日期：1993-01-01 00:00:00
abstract：:Recently, it has been reported that grasping with the left hand is more vulnerable to visual size illusions than grasping with the right hand. The present study investigated whether this increased sensitivity of the left hand for visual context extends to reaching. Left- and right-handed participants reached for targe...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2214-6
更新日期：2010-05-01 00:00:00
abstract：:The aim of this study was to examine effects of different types of task constraints on coupling of perception and action in people with chronic stroke when crossing obstacles during a walking task. Ten participants with hemiplegic chronic stroke volunteered to walk over a static obstacle under two distinct task constr...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-017-4920-9
更新日期：2017-06-01 00:00:00
abstract：:The fate of monoclonal anti-vasopressin antibodies (VP-MAbs) injected in vivo into the paraventricular nucleus (PVN) of the rat brain was studied by immunocytochemistry. Depending on the post survival time, VP-MAbs contained in an ascites fluid were stained at different levels of the VP neurons: the cytoplasm of the P...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235986
更新日期：1987-01-01 00:00:00
abstract：:Pieces of the developing cerebellar anlage were prepared from 13-15 day old rat embryos and transplanted to the cerebellar region of 5-7 and 13-14 day old rat pups. Approximately two months later, sections showed most grafts to consist of both cerebellar cortex, with a typical trilaminar organization, and white matter...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237288
更新日期：1984-01-01 00:00:00
abstract：:Our objective was to determine if caudal ventral respiratory group (VRG) expiratory (E) neurons that drive abdominal expiratory motoneurons in the lumbar cord respond to intercostal and lumbar nerve afferent stimulation. Results showed that 92% of medullary E-neurons that were antidromically activated from the upper l...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230702
更新日期：1989-01-01 00:00:00
abstract：:Developmental changes in the human brain coincide with and underlie changes in a wide range of motor and cognitive abilities. Neuroimaging studies have shown that musical training can result in structural and functional plasticity in the brains of musicians, and that this plasticity is greater for those who begin trai...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0619-z
更新日期：2007-01-01 00:00:00
