Modulation of locomotor activity in complete spinal cord injury.

abstract：:During everyday life, healthy adults occasionally trip over an obstacle that they knew was there. These 'spontaneous' trips can provide insight into the circumstances leading to trips and falls. The goal of this study was to describe the errors in foot placement and/or foot elevation that resulted in a spontaneous con...

journal_title：Experimental brain research

authors： Heijnen MJ,Muir BC,Rietdyk S

更新日期：2012-11-01 00:00:00

abstract：:Dissociated cell suspensions were prepared from the ventral midbrain of normal mouse foetuses and stereotaxically implanted into the neostriatum of 2-3 months old homozygous weaver mutant mice, which are severely deficient in dopamine. In tests of amphetamine-induced turning behaviour 60 days after grafting, recipient...

journal_title：Experimental brain research

authors： Triarhou LC,Brundin P,Doucet G,Norton J,Björklund A,Ghetti B

更新日期：1990-01-01 00:00:00

abstract：:The simultaneous presentation of a visual and an auditory stimulus can lead to a decrease in people's ability to perceive or respond to the auditory stimulus. In this study, we investigate the effect that threat has upon this phenomenon, known as the Colavita visual dominance effect. Participants performed two blocks ...

journal_title：Experimental brain research

authors： Van Damme S,Crombez G,Spence C

更新日期：2009-02-01 00:00:00

abstract：:Gait is recognized as a key item related to mental function. Anomalous gait in psychotic individuals has been described for the lower extremities, whereas irregularities for upper body dynamics are not described, explained or verified with unbiased methods. Reduced walking velocity and increased somatic tension define...

journal_title：Experimental brain research

authors： Stensdotter A,Pedersen N,Wanvik A,Öhberg F,Fløvig JC,Fors EA

更新日期：2012-09-01 00:00:00

abstract：:Two components of long-term potentiation (LTP) are distinguished with extracellular recording electrodes: a synaptic and an EPSP-Spike (E-S) component. The latter consists of the enhancement produced in the population spike amplitude in excess of that predicted by EPSP potentiation alone. The experiments carried out i...

journal_title：Experimental brain research

authors： Chavez-Noriega LE,Halliwell JV,Bliss TV

更新日期：1990-01-01 00:00:00

abstract：:Upper trunk bending movements were accompanied by opposite movements of the lower body segments. These axial kinematic synergies maintained equilibrium during the movement performance by stabilizing the center of gravity (CG), which shifted on average across all the subjects by 1 +/- 4 cm in the anteroposterior direct...

journal_title：Experimental brain research

authors： Alexandrov A,Frolov A,Massion J

更新日期：1998-01-01 00:00:00

abstract：:Movements of the dominant and nondominant hand have been claimed to differ with respect to how they take intersegmental dynamics into account. Consistent with this claim, movements of the dominant hand are hypothesized to better exploit the intrinsic limb dynamics, whereas movements of the nondominant hand are control...

journal_title：Experimental brain research

authors： Heuer H

更新日期：2007-04-01 00:00:00

abstract：:Early postnatal application of thyroid hormones to rats results in morphological changes in septum and hippocampus. Modulation in the expression of either neurotrophins and/or their receptors is postulated to be responsible for these effects. In the present study we tested whether thyroxine administration leads to cha...

journal_title：Experimental brain research

authors： Lüesse HG,Roskoden T,Linke R,Otten U,Heese K,Schwegler H

更新日期：1998-03-01 00:00:00

abstract：:Paired-pulse transcranial magnetic stimulation was used in three experiments to measure the properties of long-latency intracortical inhibition (LICI) acting on the relaxed first dorsal interosseus muscle of the left and right hand in right-handed volunteers. The experiments show that LICI is asymmetrical: it emerges ...

journal_title：Experimental brain research

authors： Hammond GR,Garvey CA

更新日期：2006-07-01 00:00:00

abstract：:The gap effect refers to the finding that saccadic latencies are typically reduced when a fixation point is removed prior to the appearance of a peripheral target. This reduction in saccadic reaction time (SacRT) is thought to be due to a general warning effect and an oculomotor specific fixation offset that occur whe...

journal_title：Experimental brain research

authors： Pratt J,Bekkering H,Leung M

更新日期：2000-01-01 00:00:00

abstract：:We investigated the effect of different spatial and temporal parameters on the saccadic reaction times (SRTs) of the antisaccades and on the frequency and the SRTs of erratic prosaccades in five adult human subjects. The subjects were instructed to aim their saccades to the side opposite to where a visual go-stimulus ...

journal_title：Experimental brain research

authors： Fischer B,Weber H

更新日期：1997-09-01 00:00:00

abstract：:We tested the hypothesis that frontal eye field (FEF) visual activity integrates visual information with a template of a target by examining whether a target that is not present in a search display influences the target selection in FEF. Neural activity was recorded in FEF of macaque monkeys performing visual search f...

journal_title：Experimental brain research

authors： Sato TR,Watanabe K,Thompson KG,Schall JD

更新日期：2003-08-01 00:00:00

abstract：:Clear vision of objects moving in three-dimensional space near an observer is attained by a combination of smooth-pursuit and vergence eye movements. The two systems must interact with the vestibular system to maintain the image of the object on the fovea. Previous studies showed that training with smooth-pursuit vest...

journal_title：Experimental brain research

authors： Sato F,Akao T,Kurkin S,Fukushima J,Fukushima K

更新日期：2004-05-01 00:00:00

abstract：:We investigated how neurons in the different motor areas of the frontal lobe reflect the movement dynamics, and how their neuronal activity undergoes plastic changes when monkeys adapt to perturbing forces (they learn new dynamics). Here we describe the results obtained in the dorsal premotor area (PMd) and ventral pr...

journal_title：Experimental brain research

authors： Xiao J,Padoa-Schioppa C,Bizzi E

更新日期：2006-01-01 00:00:00

abstract：:The time course of development of visual acuity for square wave gratings was measured behaviourally in a number of cats that were reared in total darkness until they were either 4 (5 cats) or 6 (1 cat) months of age. Less extensive measurements were also made on animals reared in a similar manner until they were eithe...

journal_title：Experimental brain research

authors： Timney B,Mitchell DE,Giffin F

更新日期：1978-04-14 00:00:00

abstract：:We have developed a tri-axial model of spatial orientation applicable to static 1g and non-1g environments. The model attempts to capture the mechanics of otolith organ transduction of static linear forces and the perceptual computations performed on these sensor signals to yield subjective orientation of the vertical...

journal_title：Experimental brain research

authors： Bortolami SB,Rocca S,Daros S,DiZio P,Lackner JR

更新日期：2006-08-01 00:00:00

abstract：:Fast cyclic movements and discrete motor acts are controlled differently, presumably because fast cyclic tasks are more automated, thereby depending on different circuits. If fast cyclic movements are made less predictable (e.g., by mixing frequencies), one would predict that their control will be less automated, requ...

journal_title：Experimental brain research

authors： Koenraadt KL,Duysens J,Meddeler BM,Keijsers NL

更新日期：2013-11-01 00:00:00

abstract：:A strong assumption shared by major theoretical approaches to cognition posits that the human cognitive system has a limited capacity for information processing. Evidence supporting this claim comes from the dual-task paradigm in which one cognitive system has to process two tasks simultaneously. In this study, we exa...

journal_title：Experimental brain research

authors： Liepelt R,Prinz W

更新日期：2011-06-01 00:00:00

abstract：:The study addresses three main questions: (1) Does the magnitude of the grasping force affect the prehension synergies, i.e., conjoint changes of finger forces and moments? (2) Do individual finger forces scale with the total grasping forces ('scale-invariance hypothesis')? (3) How specification of the grasping force ...

journal_title：Experimental brain research

authors： Niu X,Latash ML,Zatsiorsky VM

更新日期：2009-03-01 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

authors： Adam JJ,Müskens R,Hoonhorst S,Pratt J,Fischer MH

更新日期：2010-05-01 00:00:00

abstract：:Evidence is presented that simple cells in the cat striate cortex (area 17) fail to respond to two dimensional random patterns but respond vigorously to one dimensional patterns with identical power at the preferred orientation of the cell. Further observations suggest that complex cells inhibit simple cells so as to ...

journal_title：Experimental brain research

authors： Burr D,Morrone C,Maffei L

更新日期：1981-01-01 00:00:00

abstract：:We studied visuomotor processing in the middle (MS) and lateral suprasylvian (LS) cortices of the alert cat by making single cell recordings while the cat was working in a behavioral task requiring visual fixation and visually guided eye movements. We found responses with three different components: visual sensory, sa...

journal_title：Experimental brain research

authors： Yin TC,Greenwood M

更新日期：1992-01-01 00:00:00

abstract：: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 r...

journal_title：Experimental brain research

authors： Shuggi IM,Shewokis PA,Herrmann JW,Gentili RJ

更新日期：2018-02-01 00:00:00

abstract：:Microscopic illumination of two neighbouring photoreceptor cells within a single ommatidium induces a strong sequence-dependent response in a directionally selective, motion-sensitive neuron. The response is characterized by a strong facilitation in the preferred direction and a weaker inhibition in the reverse direct...

journal_title：Experimental brain research

authors： Riehle A,Franceschini N

更新日期：1984-01-01 00:00:00

abstract：:The fiber arrangement of the optic radiation was investigated in fourteen adult cats. The retinotopies of the lateral geniculate nucleus (LGN) were first identified electrophysiologically, and thereafter, wheat germ agglutinin conjugated to horseradish peroxidase (WGA-HRP) was iontophoretically injected into defined p...

journal_title：Experimental brain research

authors： Senoh K,Naito J

更新日期：1991-01-01 00:00:00

abstract：:This paper investigates how the efficiency and robustness of a skilled rhythmic task compete against each other in the control of a bimanual movement. Human subjects juggled a puck in 2D through impacts with two metallic arms, requiring rhythmic bimanual actuation. The arms kinematics were only constrained by the posi...

journal_title：Experimental brain research

authors： Ronsse R,Thonnard JL,Lefèvre P,Sepulchre R

更新日期：2008-05-01 00:00:00

abstract：:The objective of this study was to investigate interhemispheric transcallosal connections between primary motor cortices noninvasively in awake human subjects. For this purpose, focal transcranial magnetic stimulation was performed on eight healthy, right-handed subjects and one patient with congenital collosal agenes...

journal_title：Experimental brain research

authors： Schnitzler A,Kessler KR,Benecke R

更新日期：1996-12-01 00:00:00

abstract：:It is widely believed that cells in area 17 send axons specifically to neurons in other cortical areas whose receptive fields coincide with their own. We asked whether this was true in cats for area 17's projection to a large suprasylvian visual area, the Clare-Bishop area. Receptive fields were plotted at multiple si...

journal_title：Experimental brain research

authors： Sherk H,Ombrellaro M

更新日期：1988-01-01 00:00:00

abstract：:The influence of radial (near-far) and vertical (upper-lower) dimensions on lateral visuo-spatial neglect was studied using two horizontal line-bisection tasks (one motor and one perceptual). A group of 15 patients with neglect and a group of 14 right-brain damaged patients without neglect were examined. This latter g...

journal_title：Experimental brain research

authors： Pitzalis S,Di Russo F,Spinelli D,Zoccolotti P

更新日期：2001-02-01 00:00:00

abstract：:The goal of the present investigation was to determine the time-course by which the motor system might resolve the context-dependent effects of a visual illusion [i.e., the Müller-Lyer (ML) figure]. Specifically, we asked participants to scale their grip aperture (GA) to the perceived size of an object embedded within...

journal_title：Experimental brain research

authors： Heath M,Rival C,Binsted G

更新日期：2004-10-01 00:00:00