Abstract：
:Almost two decades ago, sequential effects of human grasping behaviour were described for the first time: In a sequential task, participants persisted in using the previous grasp type. According to the plan-modification hypothesis, such sequential effects reduce the movement planning costs and occur within a limited range of indifference. In the current study, we asked whether the anticipated mechanical costs of a movement would compete with the movement planning costs and, thus, reduce the magnitude of the sequential effect. To this end, participants were tested in a sequential, perceptual-motor task (opening a column of drawers), which offered a continuous range of posture solutions for each trial. In a pre-/post-test design, the magnitude of the sequential effect was measured before and after a manipulation phase with increased mechanical costs. Participants displayed a sequential effect for the majority of drawers in the pre-test, which was significantly reduced in the post-test. This finding indicates that each executed movement is a weighted function of both its cognitive and mechanical costs. The result also implies that sequential effects do not result solely from dynamical properties of the motor system, but instead reflect computational features of the movement selection process.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Schütz C,Schack Tdoi
10.1007/s00221-013-3576-3subject
Has Abstractpub_date
2013-08-01 00:00:00pages
445-55issue
4eissn
0014-4819issn
1432-1106journal_volume
228pub_type
杂志文章,随机对照试验abstract：:Changes in the direction of the line of sight (gaze) allow successive sampling of the visual environment. Saccadic eye movements accomplish this goal when the head does not move. Medium-lead burst neurons (MLBs) in the paramedian pontine reticular formation (PPRF) discharge a high frequency burst of action potentials ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-011-2823-8
更新日期：2011-10-01 00:00:00
abstract：:Even the simplest volitional movements must be precisely coordinated with anticipatory postural adjustments. Little is currently known about the neural networks that coordinate these adjustments in healthy adults. We measured brain activity prior to movement during a bimanual load-lifting task, designed to elicit anti...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2470-5
更新日期：2011-01-01 00:00:00
abstract：:Three experiments examined interactions between posture control in upright stance and a concurrent location memory task. Healthy young participants stood upright and memorized the locations of dots presented on a computer screen. In the retrieval phase, they indicated whether arrows presented on the screen would pass ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-011-2970-y
更新日期：2012-03-01 00:00:00
abstract：:This study investigates coordination between hand transport and grasp movement components by examining a hypothesis that the hand location, relative to the object, in which aperture closure is initiated remains relatively constant under a wide range of transport speed. Subjects made reach-to-grasp movements to a dowel...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0423-9
更新日期：2006-09-01 00:00:00
abstract：:Growing evidence suggests that blind subjects outperform the sighted on certain tactile discrimination tasks depending on cutaneous inputs. The purpose of this study was to compare the performance of blind (n = 14) and sighted (n = 15) subjects in a haptic angle discrimination task, depending on both cutaneous and pro...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-008-1327-7
更新日期：2008-06-01 00:00:00
abstract：:Previous studies showed that changing forces of gravity as they typically occur during parabolic flights might be responsible for adaptional processes of the CNS. However, until now it has not been differentiated between primary influences of weightlessness and secondary influences due to psycho-physiological factors ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-007-1187-6
更新日期：2008-03-01 00:00:00
abstract：:The activity of voltage-gated K(+) channels (Kv) can be dynamically modulated by several events, including neurotransmitter stimulated biochemical cascades mediated by G protein-coupled receptors such as 5-HT2 receptors (5-HT2Rs). Activation of 5-HT2A/CR inhibits the Shaker-like K(+) channels Kv1.1 and Kv1.2, and this...
journal_title：Experimental brain research
pub_type： 杂志文章,评审
doi：10.1007/s00221-013-3555-8
更新日期：2013-10-01 00:00:00
abstract：:Extracellular single-neuron recordings were obtained from electrophysiologically identified nigrostriatal neurons in chloral hydrate anesthetized rats, in order to test the hypothesis that excitatory amino acid receptors are involved in responses of these neurons to electrical stimulation of the pontine region where t...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229003
更新日期：1992-01-01 00:00:00
abstract：:In an attempt to identify cholinergic neurons of the brain stem which project to the forebrain, retrograde labeling of neurons in the brain stem was examined by autoradiography following injections of 20 microCi [3H]choline into the thalamus, hypothalamus, basal forebrain and frontal cortex. After injections into the ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236317
更新日期：1987-01-01 00:00:00
abstract：:When the visual background is moving while subject fixate a visual target, optokinetic eye movements (OKN) are suppressed and the after response, called optokinetic after nystagmus (OKAN), occurring at the stimuli offset is often inverted as compared to the situation when the OKN movements are allowed. In this study, ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-008-1595-2
更新日期：2009-02-01 00:00:00
abstract：:Stimulation of cutaneous foot afferents has been shown to evoke a facilitation of the tibialis anterior (TA) EMG-activity at a latency of 70-95 ms in the early and middle swing phase of human walking. The present study investigated the underlying mechanism for this facilitation. In those subjects in whom it was possib...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050600
更新日期：1999-01-01 00:00:00
abstract：:The egocentric localization of objects in extrapersonal space requires that the retinal and extraretinal signals specifying the gaze direction be simultaneously processed. The question as to whether the extraretinal signal is of central or peripheral origin is still a matter of controversy, however. Three experiments ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229419
更新日期：1991-01-01 00:00:00
abstract：:After injection of 3H dihydrotestosterone, concentration and retention of radioactivity occur in nuclei of certain neurons in the spinal cord and spinal ganglia as well as in dorsal and ventral root cells of chick embryos at day 10, 12, and 18. Cell of the glycogen body show nuclear labeling at day 12, but not at day ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236561
更新日期：1981-01-01 00:00:00
abstract：:The purpose of this study is to analyze the coordination patterns of the elevation angles of lower limb segments following the onset of unsupported walking in children and to look for the existence of a planar covariation rule as previously described in adult human locomotion. The kinematic patterns of locomotion were...
journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
doi：10.1007/s002210000663
更新日期：2001-04-01 00:00:00
abstract：:In a previous study, we found that haptic guidance from a robotic steering wheel can improve short-term learning of steering of a simulated vehicle, in contrast to several studies of other tasks that had found that the guidance either impairs or does not aid motor learning. In this study, we examined whether haptic gu...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-009-2026-8
更新日期：2010-03-01 00:00:00
abstract：:The major mammalian subcortical visual structures receive topographically ordered projections from both eyes. In the adult dorsal lateral geniculate nucleus (dLGN) each projection terminates in separate restricted regions of the nucleus. This pattern is different during development. Initially in ferrets the projection...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00231260
更新日期：1990-01-01 00:00:00
abstract：:The effects of bilateral focal cooling of dorsolateral thoracic spinal cord on segmental reflex pathways to the triceps surae muscles were assessed in decerebrate cats from the reflex forces produced by single shocks or trains of electrical stimuli applied to the ipsilateral caudal cutaneous sural and the contralatera...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230042
更新日期：1995-01-01 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
pub_type： 杂志文章
doi：10.1007/s00221-008-1608-1
更新日期：2009-02-01 00:00:00
abstract：:We determined whether uncertainty about the location of one's hand in virtual environments limits the efficacy of online control processes. In the Non-aligned and Aligned conditions, the participant's hand was represented by a cursor on a vertical or horizontal display, respectively. In the Natural condition, particip...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2487-9
更新日期：2011-02-01 00:00:00
abstract：:The distribution and morphology of developing corpus callosum (CC) axons in rat visual cortex was studied by unilateral application of the in vivo anterograde tracer biotinylated dextran amine (BDA) to the visual or auditory cortex of newborns through adults. Changes in the distribution and morphology of CC axons duri...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210000576
更新日期：2001-01-01 00:00:00
abstract：:The biceps femoris (BF) muscle is divided into three neuromuscular compartments defined by the innervation patterns of the main nerve branches (English and Weeks 1987). The goals of this study were i) to determine how different regions of the biceps femoris muscle are activated in the intact cat during a broad range o...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229406
更新日期：1991-01-01 00:00:00
abstract：:Subjects exposed to a rotating environment that perturbs their postural sway show adaptive changes in their voluntary spatially directed postural motion to restore accurate movement paths but do not exhibit any obvious learning during passive stance. We have found, however, that a variable known to characterize the de...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-013-3815-7
更新日期：2014-04-01 00:00:00
abstract：:In anesthetized cats 251 cells within the cortical vestibular projection area, adjacent to the post-cruciate dimple, were analyzed as to their input characteristics employing extracellular recording techniques. The post cruciate dimple vestibular field, which is located in area 3a, has a high degree of convergence bet...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237688
更新日期：1975-01-01 00:00:00
abstract：:Transparency is perceived when two or more objects or surfaces can be separated by the visual system whilst they are presented in the same region of the visual field at the same time. This segmentation of distinct entities on the basis of overlapping local visual cues poses an interesting challenge for the understandi...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-013-3631-0
更新日期：2013-09-01 00:00:00
abstract：:Serotonin reveals ineffective (subthreshold) pathways from the C2 lateral funiculus to ipsilateral phrenic motoneurons in spinalized rats. The objective of the present study was to investigate serotonergic modulation of crossed-spinal pathways to contralateral phrenic motoneurons. Rats (n = 10) were anesthetized (uret...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00243214
更新日期：1994-01-01 00:00:00
abstract：:Within-arm somatotopy was identified in multiple motor areas of six normal human subjects who performed a visuomotor tracking task during positron emission tomography (PET) measurement of relative cerebral blood flow (relCBF). A randomly moving target, presented on a computer monitor, was continuously followed with th...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229666
更新日期：1993-01-01 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：:Previous work has suggested that conscious error awareness may fluctuate with levels of attention. Here, we explore this relationship by showing that error awareness can be impaired when exogenous support to attentional systems is reduced by decreasing task demands. Twenty participants performed a manual Go/No-Go resp...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-007-1054-5
更新日期：2007-09-01 00:00:00
abstract：:Brain-damaged patients may extinguish contralesional stimuli when ipsilesional stimuli are presented simultaneously. Most theories of extinction postulate that stimuli compete for pathologically limited attentional resources with a bias to process ipsilesional over contralesional stimuli. Implicit in this view is the ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-003-1823-8
更新日期：2004-07-01 00:00:00
abstract：:Stimulation of the parietal association cortex as well as the frontal motor cortex elicited clearly extracellular unitary activities or field potentials in the ipsilateral inferior olive in the cat. The parietal-induced responses came out generally at a longer and more variable latency than the frontal-induced ones. T...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF01474258
更新日期：1979-09-01 00:00:00
