Abstract:
:Ball-racket interactions were investigated in a task where participants propelled a ball rhythmically into the air. The study contrasted two ball-racket conditions: (1) an elastic impact where the ball was able to rebound due to the elasticity of the colliding objects and participants bounced the ball, and (2) a non-elastic impact where the coefficient of restitution was zero and the ball did not rebound such that the participants had to throw the ball. The goal of the study was to contrast the situations where haptic information about the ball-racket interactions is either secondary (elastic bouncing) or becomes a primary factor for control (non-elastic propulsion). In the elastic condition, the performers controlled the parameters for ball-racket contact prior to contact: In agreement with the criteria for dynamical stability defined by a model, racket accelerations immediately before the contacts were negative, racket positions and velocities at the instant of the initial contact correlated negatively, contact durations were short (30+/-9 ms), and during the collision interval racket velocity and acceleration decreased monotonically. In the non-elastic condition, the parameters of ball release were primarily controlled during the collision phase: Racket accelerations before contact were positive, racket positions and velocities at initial contact showed weak correlations, and the contact intervals were significantly longer (116+/-15 ms) with a clear segmentation into two segments. Negative correlations were observed between the integrals of the velocity and acceleration computed over the two consecutive segments, giving evidence that in the non-elastic condition the CNS is able to introduce corrections during the very short collision interval. The results are discussed with respect to physiological mechanisms of movement corrections available during such short time intervals.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Katsumata H,Zatsiorsky V,Sternad Ddoi
10.1007/s00221-002-1331-2keywords:
subject
Has Abstractpub_date
2003-03-01 00:00:00pages
17-29issue
1eissn
0014-4819issn
1432-1106journal_volume
149pub_type
杂志文章abstract::The mechanisms underlying stress-induced hyperalgesia (SIH) remain poorly understood. Recent findings have provided strong evidence indicating that SIH could be related, at least in part, to alterations in spinal cord GABA activity. In the present study, we first investigated how acute restraint stress impacted pain r...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-014-4027-5
更新日期:2014-11-01 00:00:00
abstract::Hand muscle reflexes following muscle stretch and electrical nerve stimulation show a typical pattern consisting of short- and long-latency reflexes. The present investigation was designed to test reflexes following pure cutaneous stimulation. Air puffs were delivered to the palmar tip and the nail bed of the first, s...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00242189
更新日期:1995-01-01 00:00:00
abstract::In 15 musicians, cortical DC-potentials were recorded from the scalp before and during the execution of bimanual motor sequences. Subjects (Ss) either tapped with their two index fingers in synchrony (quavers against quavers; "2 against 2") or they tapped quavers against triplets ("2 against 3"). Either the right or t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00229320
更新日期:1990-01-01 00:00:00
abstract::During normal postnatal development, there is an overproduction and subsequent partial elimination of the callosal projections of cortical areas 17 and 18 in the cat. In the present study, we investigated how neonatal splitting of the optic chiasm affects this process. Our results indicate that neonatal splitting of t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00242013
更新日期:1995-01-01 00:00:00
abstract::This longitudinal study, extending over 12 months, assessed the behavioural and biochemical effects of hippocampal sympathetic ingrowth (HSI) into the partially denervated hippocampus. Male Long-Evans rats received fimbria-fornix lesions (FIFO) or sham operations at 90 days of age. At the same time half of the rats fr...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230648
更新日期:1995-01-01 00:00:00
abstract::Short interval intracortical inhibition (SICI) is a common paired-pulse TMS technique that is used to measure GABAa-ergic inhibition in the cerebral motor cortex. However, inhibition evaluated with an interstimulus interval (ISI) between the TMS pulses of 2.5 ms has quite different properties from that seen at 1 ms. I...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-012-3369-0
更新日期:2013-03-01 00:00:00
abstract::In the present study the neurotoxic effects of a low dosage (0.5 mg/kg per day) of methylmercury (MeHg) on the developing nervous system were investigated. Pregnant rats were treated with MeHg from day 7 of pregnancy to day 7 of lactation. Locomotor activity (locomotion, rearing, and motility) and spatial learning abi...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s002210050237
更新日期:1997-12-01 00:00:00
abstract::Ocular responses to optokinetic stimulation were reexamined in adult albino rats of two different strains. Eye movements were measured in head-restrained animals using the search coil method. In contrast to some previous results, the albino rats showed optokinetic nystagmus, and some of them made responses comparable ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00235639
更新日期:1985-01-01 00:00:00
abstract::The tendency to generate head movements during saccades varies from person to person. Head movement tendencies can be measured as subjects fixate sequences of illuminated targets, but the extent to which such measures reflect eye-head coupling during more natural behaviors is unknown. We quantified head movement tende...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1534-2
更新日期:2008-12-01 00:00:00
abstract::We examined modulation of transmission of short-latency excitation produced by distal hindlimb cutaneous input, as well as fluctuations in motoneuron membrane potential and input resistance, in flexor digitorum longus (FDL) motoneurons during fictive locomotion. Fictive stepping was induced in unaesthetized, decerebra...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00248749
更新日期:1988-01-01 00:00:00
abstract::It is well established that neuronal transmission from the entorhinal cortex through the dentate gyrus via the perforant path is dependent on behavioral state. To further study the modulation of neuronal transmission by behavioral state we employed the paired-pulse technique to study interneuronally-mediated inhibitio...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00249612
更新日期:1989-01-01 00:00:00
abstract::Responses of motoneurons supplying muscles of the forelimbs, hindlimbs, back, and neck to stimulation of the medial pontomedullary reticular formation were studied with intracellular recording in cerebellectomized cats under chloralose anesthesia. Stimulation of the midline or of a reticular region consisting of nucle...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00238464
更新日期:1979-06-01 00:00:00
abstract::Humans use a specific steering synergy, where the eyes and head lead rotation to the new direction, when executing a turn or change in direction. Increasing evidence suggests that eye movement is critical for turning control and that when the eyes are constrained, or participants have difficulties making eye movements...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-013-3466-8
更新日期:2013-05-01 00:00:00
abstract::Postural control is an important factor for early motor development; however, compared with adults, little is known about how infants control their unperturbed upright posture. This lack of knowledge, particularly with respect to spatial and temporal characteristics of infants' unperturbed independent standing, repres...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-007-1236-1
更新日期:2008-03-01 00:00:00
abstract::The survival of grafts of dissociated allogeneic fetal neural dopamine (DA) rich tissue in the striatum has been studied after transplantation between inbred strains of mice differing at defined immunogenetical loci between donor and recipient. Six to 7 weeks and 15 weeks after grafting, surviving grafted DA neurons w...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00253636
更新日期:1989-01-01 00:00:00
abstract::We have shown before that subjects exposed to a changed gravitoinertial environment produce exaggerated manual forces. From the observed pattern of findings, we argued that initial forces were exaggerated because of abnormal vestibular activity and peak forces because of degraded proprioceptive feedback. If so, only p...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-012-2999-6
更新日期:2012-04-01 00:00:00
abstract::The reduction in saccade latency when the fixation point is removed (fixation offset effect-FOE) reflects the degree to which fixation neurons are under influence by a stimulus at fixation. Strategic manipulations of oculomotor readiness that bring these neurons under endogenous control reduce the magnitude of the FOE...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1655-7
更新日期:2009-02-01 00:00:00
abstract::Traditional approaches to research on bimanual coordination focus on sensorimotor interference, motor programming, and effects of perception and feedback guidance; surprisingly, little is known about high-level conceptual constraints that might unify separate movements into coordinated actions. We investigated two pos...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-010-2365-5
更新日期:2010-08-01 00:00:00
abstract::Several non-physiological stimuli (i.e. pharmacological or electrical stimuli) have been shown to induce Fos expression in striatal neurons. In this work, striatal Fos (i.e. Fos-like) expression was studied after physiological stimulation, i.e. motor activity (treadmill running at 36 m/min for 20 min). In rats killed ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/pl00005715
更新日期:1997-07-01 00:00:00
abstract::We studied 12 patients with Parkinson's disease (PD): 6 with postural instability (Hoehn and Yahr Stage 3) and 6 without (Stage 2 or 2.5), using a quantitative test based on the clinical pull test. Their findings were compared with those for 12 healthy controls. The patients on their usual medications were pulled eith...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-019-05553-8
更新日期:2019-07-01 00:00:00
abstract::Cortical spreading depression (CSD) is influenced by brain excitability and is related to neurological diseases, such as epilepsy. In vitro evidence indicates that neuronal electrical activity is potentiated after CSD. Malnutrition can cause electrophysiological changes in the brain, both in animals and in humans. Her...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-011-2844-3
更新日期:2011-10-01 00:00:00
abstract::Reflexive attentional shift in response to another individual's gaze direction has been reported, but it remains unknown whether this process can occur subliminally. We investigated this issue using facial stimuli consisting of drawings (Experiment 1) and photographs (Experiment 2). The gaze direction was expressed by...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-007-1025-x
更新日期:2007-10-01 00:00:00
abstract::The total number of granule cells in the dentate gyrus was estimated in 17 male rats, four each aged 30, 120, and 200 days, and five aged 365 days. There is a substantial 35-43% linear increase between 1 month and 1 year. Two parameters of the granular layer are involved in the numerical change. First, total granular ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00238626
更新日期:1982-01-01 00:00:00
abstract::The effect of unilateral vestibular deafferentation (UVD) on the linear vestibulo-ocular reflex (LVOR) was studied in 11 humans an average of 52 months following surgical UVD. Controls consisted of seven healthy age-matched subjects. The LVOR was evoked by directionally random, transient whole body interaural (heave) ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-004-2089-5
更新日期:2005-03-01 00:00:00
abstract::Prevention of testosterone aromatization in the female rat pups by perinatal treatment with 1,4,6 androstatriene-3,17-dione (ATD) induces an important defeminization as shown by a reduction of fluctuations of LH release after castration and estradiol implantation. The fact that, under our in vitro experimental conditi...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00340477
更新日期:1986-01-01 00:00:00
abstract::Successfully picking up and handling objects requires taking into account their physical properties (e.g., material) and position relative to the body. Such features are often inferred by sight, but it remains unclear to what extent observers vary their actions depending on the perceived properties. To investigate thi...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-016-4631-7
更新日期:2016-08-01 00:00:00
abstract::The purpose of this study was to identify the functional fields activated in relation to gestural movements. Using functional magnetic resonance imaging (fMRI), we mapped brain activity in ten right-handed, normal volunteers during activation and control tasks. The activation condition consisted of pantomiming tool-us...
journal_title:Experimental brain research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s002210100777
更新日期:2001-08-01 00:00:00
abstract::Proprioception is used by the central nervous system (CNS) in the control of the spatial and temporal characteristics of single joint and multiple joint movement. The present study addressed the role of proprioception in the control of bilateral cyclical movements of the limbs. Normal blindfolded human subjects drew c...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s002210050788
更新日期:1999-07-01 00:00:00
abstract::In studies of human eye-head coordinated saccadic gaze shifts, different laboratories have found greatly different magnitudes of head movements for a given amplitude of gaze shift (head movement gain). The present study was conducted to examine why, and to quantify volitional head movements. Fixation/target lights wer...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230391
更新日期:1992-01-01 00:00:00
abstract::Neutral buoyancy facilities are used to prepare astronauts and cosmonauts for extra vehicular activities e.g. on-board of the International Space Station. While previous studies indicated a decrease in cognitive performance in an under water setting, they have only provided behavioural data. This study aimed to review...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-014-4019-5
更新日期:2014-10-01 00:00:00