Abstract:
:The characteristics of vibration-induced illusory joint movements were studied in healthy human subjects. Unseen by the subject, constant frequency vibration trains applied to the distal tendon of the Triceps or Biceps induced an almost constant velocity illusory movement of the elbow whose direction corresponded to that of a joint rotation stretching the vibrated muscle. Vibration trains of the same duration and frequency applied alternatively to the Biceps and Triceps evoked alternating flexion-extension illusory movements. During successive application of vibration trains at frequencies from 10 to 120 Hz, the perceived velocity of the illustory movements increased progressively from 10 to 70-80 Hz, then decreased from 80 to 120 Hz. The maximal perceived velocity was three times higher during alternating vibration of the Biceps and Triceps than during single muscle stimulation. Unit activity from 15 muscle spindle primary endings and five secondary endings located in Tibialis anterior and Extensor digitorum longus muscles were recorded using microneurography in order to study their responses to tendon vibration and passive and active movements of the ankle. Primary endings were all activated by low amplitude tendon vibration (0.2-0.5 mm) previously used to induce illusory movements of the elbow. The discharge of some was phase-locked with the vibration cycle up to 120 Hz, while others responded one-to-one to the vibration cycle up to 30-50 Hz, then fired in a sub-harmonic manner at higher frequencies. Secondary endings were much less sensitive to low amplitude tendon vibration. Primary and secondary ending responses to ramp and sinusoidal movements of the ankle joint were compared. During the movement, the primary ending discharge frequency was almost constant, while the secondary ending activity progressively increased. During ankle movements the primary ending discharge appeared mainly related to velocity, while some secondary activities seemed related to both movement velocity and joint angle position. Muscle spindle sensory ending responses to active and passive ankle movements stretching the receptor-bearing muscle (plantar flexion) were qualitatively and quantitatively similar. During passive reverse movements (dorsiflexion) most of the sensory endings stopped firing when their muscle shortened. Active muscle shortening (isotonic contraction) modulated differently the muscle spindle sensory ending discharge, which could stop completely, decrease or some times increase during active ankle dorsiflexion. During isometric contraction most of the muscle spindle sensory endings were activated. The characteristics of the vibration-induced illusory movements and the muscle spindle responses to tendon vibration and to active and passive joint movements strengthened the possibility of the contribution of primary endings to kinesthesia, as suggested by several previous works...
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Roll JP,Vedel JPdoi
10.1007/BF00239377subject
Has Abstractpub_date
1982-01-01 00:00:00pages
177-90issue
2eissn
0014-4819issn
1432-1106journal_volume
47pub_type
杂志文章abstract::The output from a motor nucleus is determined by the synaptic input to the motor neurons and their intrinsic properties. Here, we explore whether the source of synaptic inputs to the motor neurons (cats) and the age or post-stroke conditions (humans) may change the recruitment gain of the motor neuron pool. In cats, t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-019-05628-6
更新日期:2019-11-01 00:00:00
abstract::Previous studies have proposed that selecting which hand to use for a reaching task appears to be modulated by a factor described as "task difficulty," defined by either the requirement for spatial precision or movement sequences. However, we previously reported that analysis of the movement costs associated with even...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-018-5423-z
更新日期:2019-02-01 00:00:00
abstract::Studies of the effects of physical activity on cognition suggest that aerobic fitness can improve cognitive abilities. However, the physiological mechanisms for the cognitive benefit of aerobic fitness are less well understood. We examined the association between aerobic fitness and cerebrovascular function with neuro...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-018-5230-6
更新日期:2018-05-01 00:00:00
abstract::The fluorescent dye diamidino yellow was injected into parts of the developing visual and auditory systems in the rat. The dye was retrogradely transported by projecting neurones and was found to stain pyknotic profiles within the labelled cell populations. It is thus possible to visualize directly the death of neuron...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00228865
更新日期:1990-01-01 00:00:00
abstract::We recently argued that the specific compensation of spatial neglect by manipulating neck proprioceptive and vestibular input is due to a central "correction" of the disturbed neural transformation process converting the afferent input coordinates from the peripheral sensory organs into a central representation of ego...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00231791
更新日期:1996-05-01 00:00:00
abstract::Successful results obtained by training sessions using optokinetic (OK) stimulations in order to rehabilitate patients with balance disorders motivated this study. The purpose of the study was to measure eye movement parameters and body stabilization during OK stimulation before and after the rehabilitation program. T...
journal_title:Experimental brain research
pub_type: 临床试验,杂志文章
doi:10.1007/BF00232446
更新日期:1994-01-01 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
abstract::Head-fixed gaze shifts were evoked by electrical stimulation of the deeper layers of the cat superior colliculus (SC). After a short latency, saccades were triggered with kinematics similar to those of visually guided saccades. When electrical stimulation was maintained for more than 150-200 ms, postsaccadic smooth ey...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230420
更新日期:1996-01-01 00:00:00
abstract::Cerebellar cell suspensions were prepared from normal mouse embryos and implanted into the cerebellum of Purkinje cell degeneration (pcd) mutant mice, which are characterized by a virtually complete degeneration of Purkinje cells between postnatal day (P) 17 and P45. The expression of immunoreactivity for PEP-19, a de...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00248919
更新日期:1989-01-01 00:00:00
abstract::Many activities of daily living involve multi-digit, voluntary rotational manipulations of grasped objects. Yet, only a few studies have focused on coordination of individual fingertip forces during such tasks. The objective of this study was to investigate individual digit contributions to a three-digit task in which...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-015-4289-6
更新日期:2015-07-01 00:00:00
abstract::Response time, or latency, is increasingly being used to provide information about neural decision processes. LATER (Linear Approach to Threshold with Ergodic Rate) is a quasi-Bayesian model of decision-making, with the additional feature that it introduces a degree of gratuitous randomisation into the decision proces...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-011-2587-1
更新日期:2011-04-01 00:00:00
abstract::It has previously been shown that unilateral ablation of the whole auditory cortex in the cat disrupts the precedence effect, and also interferes with the ability of the normal animal to discriminate in the Y-maze between a single sound on one side and a double sound consisting of a signal on both left and right sides...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237601
更新日期:1978-02-15 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::Efferents originating from the rat medial prefrontal cortex and projecting to diencephalic and mesencephalic structures were analyzed electrophysiologically. The antidromic activation technique was used in order to identify cortical neurons which innervate the medio-dorsal nucleus of the thalamus (MD), lateral habenul...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00239191
更新日期:1983-01-01 00:00:00
abstract::Predicted motion (PM) tasks test the accuracy of predicting the future position of a moving target. Previous PM studies using audiovisual stimuli have suggested that observers rely primarily on visual motion cues. To clarify the role of auditory signals in predicting future positions of bimodal targets, we designed a ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-010-2224-4
更新日期:2010-06-01 00:00:00
abstract::This paper reports on experiments in which the effect of disconnection of association fibres from Area 17/18 to the posterior suprasylvian cortex (PSSC) was investigated. In the control experiments, all neurons had large receptive fields in the central 5-10 degrees of the visual field without detailed retinotopy. In t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00235537
更新日期:1983-01-01 00:00:00
abstract::Counts of callosal neurons retrogradely labeled by horseradish peroxidase (visualized using multiple substrates) were obtained in areas 17 and 18 of five kittens reared with their eyelids bilaterally sutured and of three kittens which had undergone bilateral enucleation on postnatal days 1--4. These counts were compar...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00239301
更新日期:1980-01-01 00:00:00
abstract::We investigated whether perception of affordances for standing on an inclined surface depended on the height of center of mass of the perceiver-actor. Participants adjusted the angle of inclination of a surface until they felt that it was just barely possible for them to stand on that surface. They performed this task...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1492-8
更新日期:2008-10-01 00:00:00
abstract::Tactile information is differentially processed over the various phases of goal-directed movements. Here, event-related potentials (ERPs) were used to investigate the neural correlates of tactile and visual information processing during movement. Participants performed goal-directed reaches for an object placed centra...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-016-4589-5
更新日期:2016-05-01 00:00:00
abstract::This research is about the role of categorical and coordinate spatial relations and allocentric and egocentric frames of reference in processing spatial information. To this end, we asked whether spatial information is firstly encoded with respect to a frame of reference or with respect to categorical/coordinate spati...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-011-2857-y
更新日期:2011-10-01 00:00:00
abstract::Identifying a stimulus as the target for a goal-directed movement involves inhibiting competing responses. Separable inhibitory interconnections bias local competition to ensure only one stimulus is selected and to alter movement initiation. Behavioural evidence of these inhibitory processes comes from the effects of ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1645-9
更新日期:2009-03-01 00:00:00
abstract::Dorsal horn neurons that express the neurokinin 1 receptor (NK-1R) play an important role in nociceptive processing. The targetting of NK-1R neurons by serotoninergic (5-hydroxytryptamine, 5-HT) axons would provide a straightforward means to exert an inhibitory analgesic effect at spinal level. This study used single ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-004-2018-7
更新日期:2005-01-01 00:00:00
abstract::Many previous studies have demonstrated the existence of neurons with tremor-frequency activity ("tremor cells") in the thalamus of Parkinson's disease (PD) patients and these neurons are presumed to play a role in the pathogenesis of tremor. Since a major input to motor thalamus (Voa and Vop) is from the internal seg...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/pl00005606
更新日期:1997-03-01 00:00:00
abstract::The purpose of this study was to investigate the relationship between EEG-derived motor activity-related cortical potential (MRCP) and voluntary muscle activation. Eight healthy volunteers participated in two experimental sessions. In one session, subjects performed isometric elbow-flexion contractions at four intensi...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s002210000382
更新日期:2000-08-01 00:00:00
abstract::Deficits in postural control are one of the hallmarks of disability in children with cerebral palsy (CP). Yet, much remains unknown regarding the etiology of postural deficits in these children. Here we evaluated postural control at a simplified task level by measuring head stability during quiet sitting while systema...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-009-2001-4
更新日期:2010-02-01 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::Observations of neurons in dorsal horn laminae IV-VI of the lumbosacral segments of Golgi-stained spinal cords in kittens and adult cats revealed laminar differences in dendritic architecture. Many neurons in lamina IV had dense, bushy dendritic fields. Lamina V contained, in addition to bushy cells similar in appeara...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237093
更新日期:1977-05-23 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::Neuron activity was recorded in monkey cerebral cortex during a visually guided reaching task. Cells located in the banks of the arcuate sulcus at its curvature changed their activity during the period in which the monkey saw a food reward in a certain position, but before it moved to retrieve the reward. A role of th...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00238755
更新日期:1981-01-01 00:00:00
abstract::Quantitative in situ hybridization was used to examine the expression of mRNA for nerve growth factor (NGF) and its receptors, p140Trk (TrkA) and p75LNGFR (LNGFR), in different brain regions of adult (3-month-old) and aged (27-month-old) Wistar rats. The brain regions studied were hippocampus (dentate gyrus, CA3 regio...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/pl00005629
更新日期:1997-04-01 00:00:00