Abstract：
:This investigation aimed at assessing the extent to which memory from practice in a specific condition of target displacement modulates temporal errors and movement timing of interceptive movements. We compared two groups practicing with certainty of future target velocity either in unchanged target velocity or in target velocity decrease. Following practice, both experimental groups were probed in the situations of unchanged target velocity and target velocity decrease either under the context of certainty or uncertainty about target velocity. Results from practice showed similar improvement of temporal accuracy between groups, revealing that target velocity decrease did not disturb temporal movement organization when fully predictable. Analysis of temporal errors in the probing trials indicated that both groups had higher timing accuracy in velocity decrease in comparison with unchanged velocity. Effect of practice was detected by increased temporal accuracy of the velocity decrease group in situations of decreased velocity; a trend consistent with the expected effect of practice was observed for temporal errors in the unchanged velocity group and in movement initiation at a descriptive level. An additional point of theoretical interest was the fast adaptation in both groups to a target velocity pattern different from that practiced. These points are discussed under the perspective of integration of vision and motor control by means of an internal forward model of external motion.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
de Azevedo Neto RM,Teixeira LAdoi
10.1007/s00221-011-2657-4subject
Has Abstractpub_date
2011-05-01 00:00:00pages
109-17issue
1eissn
0014-4819issn
1432-1106journal_volume
211pub_type
杂志文章abstract：:The cerebellum is known to participate in visually guided eye movements. The cerebellar uvula receives projections from pontine nuclei that have been implicated in visual motion processing and the generation of smooth pursuit. Single-unit and lesion studies were conducted to determine how the uvula might further proce...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00241368
更新日期：1996-06-01 00:00:00
abstract：:When sight-reading a piece of music the eyes constantly scan the score slightly ahead of music execution. This separation between reading and acting is commonly termed eye-hand span and can be expressed in two ways: as anticipation in notes or in time. Previous research, predominantly in piano players, found skill-dep...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-009-1719-3
更新日期：2009-04-01 00:00:00
abstract：:In earlier studies the tetrahydroisoquinoline derivative N-methyl-norsalsolinol (2-MDTIQ) was discovered in lumbar cerebrospinal fluid and brain of patients with Parkinson's disease. To establish whether 2-MDTIQ is toxic to the dopaminergic system, 2-MDTIQ or 6-hydroxydopamine (6-OHDA) were stereotactically injected i...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227181
更新日期：1996-11-01 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
pub_type： 杂志文章
doi：10.1007/BF00250246
更新日期：1988-01-01 00:00:00
abstract：:Limb proprioception is an awareness by the central nervous system (CNS) of the location of a limb in three-dimensional space and is essential for movement and postural control. The CNS uses the position of the head and neck when interpreting the position of the upper limb, and altered input from neck muscles may affec...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-015-4240-x
更新日期：2015-05-01 00:00:00
abstract：:It is not evident how the small effects of the flankers of the Ebbinghaus figure on peak grip aperture (PGA) should be interpreted. One interpretation is that the flankers influence the estimated size, which in turn influences the grasp. If this interpretation is correct, then only the size-dependent aspects of the gr...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-004-2138-0
更新日期：2005-05-01 00:00:00
abstract：:The parameters characterizing Listing's plane have been determined in a group of normal subjects, and in patients who have had unilateral vestibular deafferentation on the right or left side. All patients were well compensated. There was no statistically significant difference in the orientation of Listing's plane bet...
journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
doi：10.1007/BF00227346
更新日期：1994-01-01 00:00:00
abstract：:We applied vibration at various rates to the biceps tendon of a passive, restrained arm in normal human subjects and measured its effect on the perception of forearm position and the perception of forearm velocity. The disturbances of limb position perception and limb velocity perception depended on the vibration rate...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00269450
更新日期：1987-01-01 00:00:00
abstract：:The response of 835 click-sensitive neurons in the inferior colliculus (IC) to ramp frequency modulated (FM) tones was studied in the anaesthetized rat. More than 70% of the cells were sensitive to the FM sound, and over 25% were "FM specialized". Systematic variations of the stimulus parameters showed that sweep velo...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229838
更新日期：1991-01-01 00:00:00
abstract：:Through an experimental study of the stability properties of the human neuromuscular system while it performs simple point-to-point arm movements, this paper evaluates the concepts of equilibrium and virtual trajectories as a means of executing movement of the arm. Human subjects grasped the instrumented handle of a t...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228024
更新日期：1995-01-01 00:00:00
abstract：:Electrical stimulation with repetitive pulses (6/sec) was applied to the internal medullary lamina and produced tonic contraversive turning movements of eyes and head which were associated with recruiting responses in the visual cortex. Optical gratings of a spatial frequency of 0.5 c/deg which alternated with diffuse...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00234015
更新日期：1976-06-18 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：:The role of kinaesthetic afferences in controlling coupling of voluntary oscillation of the hand and foot, both in-phase and anti-phase, was investigated by modifying the mechanical properties of one of the two segments (the hand) with applied inertial or elastic loads. Loads consisted of a lead disk, rotating coaxial...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210100762
更新日期：2001-07-01 00:00:00
abstract：:We studied the finger interactions during maximum voluntary force (MVF) production in flexion and extension in children and adults. The goal of this study was to investigate the age-related changes and flexion-extension differences of MVF and finger interaction indices, such as finger inter-dependency (force enslaving...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0629-x
更新日期：2007-01-01 00:00:00
abstract：:Dopamine neurons appear to code an error in the prediction of reward. They are activated by unpredicted rewards, are not influenced by predicted rewards, and are depressed when a predicted reward is omitted. After conditioning, they respond to reward-predicting stimuli in a similar manner. With these characteristics, ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050467
更新日期：1998-08-01 00:00:00
abstract：:Extracellular focal synaptic potentials (FSPs) were recorded in forelimb segments of cats in the region where corticospinal volleys (pyramidal stimulation) gave a maximal FSP. No FSP was recorded in this region on stimulation of the medial part of the lateral reticular nucleus (LRN), provided that ventral spinal pathw...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235897
更新日期：1982-01-01 00:00:00
abstract：:Preshaping the digits and orienting the hand when reaching to grasp a distal target is proposed to be optimal when guided by vision. A reach-to-grasp movement to an object in one's own mouth is a natural and commonly used movement, but there has been no previous description of how it is performed. The movement require...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-012-3164-y
更新日期：2012-08-01 00:00:00
abstract：:Some experimental evidence suggests that grasping should be regarded as independent control of the thumb and the index finger (digit control hypothesis). To investigate this further, we compared how the tips of the thumb and the index finger moved in space when grasping spheres to how they moved when they were hitting...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-011-2756-2
更新日期：2011-08-01 00:00:00
abstract：:The present study investigated age-related changes in the attentional demands associated with interlimb coordination involving upper and lower limbs performed at three different movement frequencies. Younger and older adults performed rhythmical, 180° out-of-phase flexion-extension movements of the knee and elbow with...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-013-3511-7
更新日期：2013-06-01 00:00:00
abstract：:The use of arm weight support (WS) to optimize movement quality may be an avenue for improved upper limb stroke rehabilitation; however, the underlying neurophysiological effects of WS are not well understood. Rehabilitation exercises may be performed when sitting or standing, but the interaction of posture with WS ha...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-016-4775-5
更新日期：2017-01-01 00:00:00
abstract：:The effects of alteration of thyroid state on neurochemical maturation have been studied in rats made hypothyroid by daily injections of methimazole or hyperthyroid by daily supplementation with thyroid hormone (T3) from postnatal days 1 to 27. Biochemical assays on seven brain regions plus the spinal cord were carrie...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229834
更新日期：1991-01-01 00:00:00
abstract：:"Multisensory integration" refers to the phenomenon by which information from different senses is integrated in order to interpret and guide responses to external events. Here, we advance two specific hypotheses: (1) the process of multisensory integration in spatial localization is statistically optimal, and (2) the ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0847-2
更新日期：2007-06-01 00:00:00
abstract：:Muscle synergy is important for simplifying functional movement, which constitutes spatiotemporal patterns of activity across muscles. To execute selective finger movements that are independent of synergistic movement patterns, we hypothesized that inhibitory neural activity is necessary to suppress enslaved finger mo...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-019-05693-x
更新日期：2019-12-01 00:00:00
abstract：:In order to determine whether neurones in the parvicellular reticular formation are in direct synaptic contact with motoneurones innervating facial muscles, a combined retrograde and anterograde transport study was carried out in the rat. Animals received injections of the retrograde tracer cholera toxin B conjugated ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227336
更新日期：1994-01-01 00:00:00
abstract：:How do we achieve unitary perception of an object when it touches two parts of the sensory epithelium that are not contiguous? We investigated this problem with a simple psychophysical task, which we then used in an fMRI experiment. Two wooden rods were moved over two digits positioned to be spatially adjacent. The di...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2306-3
更新日期：2010-07-01 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
pub_type： 临床试验,杂志文章
doi：10.1007/s002210050274
更新日期：1998-01-01 00:00:00
abstract：:Intracellular injection of EGTA abolished the hyperpolarization seen after spontaneous and evoked bursts of action potentials in hippocampal CA3 neurons. Simultaneously recorded, orthodromically elicited IPSPs were relatively unaffected by this treatment. It is concluded that CA3 neurons generate at least two types of...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237513
更新日期：1981-01-01 00:00:00
abstract：:In the thalamic ventrobasal complex (VB) of the cat, effects of electrical stimulation of the pyramidal tract (PT) upon activities of 112 relay cells and 18 internuncial cells were examined. Single PT shocks to the cerebral peduncle elicited short-latency discharges in 31 relay cells (mean latency, 1.4 +/- 0.5 msec). ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00234770
更新日期：1975-03-27 00:00:00
abstract：:A Fitts' task was used to examine whether the large movement asymmetry in subjects with spastic hemiparesis can be reduced or eliminated when both limbs are required to perform functionally equivalent tasks. Furthermore, it was determined whether any such benefit was expressed as mutual accommodation, or whether one h...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00241378
更新日期：1996-06-01 00:00:00
abstract：:Electrical activity of neurons in rat hypothalamic ventromedial nucleus was recorded in tissue slices, to investigate central neural mechanisms underlying reduction of food intake caused by TRH and its metabolite, cyclo(His-Pro) [cHP]. Application of TRH had two actions: stimulation of neuronal activity, which was des...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00269457
更新日期：1987-01-01 00:00:00
