Abstract：
:Fourteen healthy adults were tested to assess the potential influence on stance maintenance of two parts of the visual feedback technique (display scale and time delay). The task consisted in their keeping a spot on the screen representing their center of pressure, CoP (i.e. successive points of application of the ground reaction forces detected by the force platform on which they were standing) to a minimum size. The analysis focused on elementary motions computed from the complex CoP trajectories, that is the horizontal motion of the center of gravity (CoG(h)) and the difference between the CoP and the vertical projection of the center of gravity (CoP-CoG(v)). The former is recognized as the main variable in postural control, and several interesting features can be extracted from the latter. The results indicate that setting a delay and increasing the display scale induce substantial reductions in CoP-CoG(v) and CoG(h) displacements, respectively. Interestingly, when the two effects are combined, these single effects cohabit quite happily. Fractional Brownian motion modeling of these trajectories revealed clearly that, in each case, these effects originate principally from poor or improved control, respectively. This feature confirms that these elementary motions are involved differently in the postural system and that study of the complex CoP might not be of great interest. By generating opposing but complementary trends, the visual feedback technique should thus be perceived as a promising tool for inducing particular postural behavior in healthy and disabled individuals.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Rougier Pdoi
10.1007/s00221-005-2288-8keywords:
subject
Has Abstractpub_date
2005-08-01 00:00:00pages
193-202issue
2eissn
0014-4819issn
1432-1106journal_volume
165pub_type
杂志文章abstract：:Trace eyeblink conditioning was investigated in 31 patients with focal cerebellar lesions and 19 age-matched controls. Twelve patients presented with lesions including the territory of the superior cerebellar artery (SCA). In 19 patients lesions were restricted to the territory of the posterior inferior cerebellar art...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-005-0171-2
更新日期：2006-03-01 00:00:00
abstract：:The actions of alpha-kainic acid (KA) were reexamined in thin sections of the hippocampus and the cerebellum of the guinea pig in view of various discrepancies between our previous findings and reports from other laboratories. Brief pulses of KA ejected in st. lucidum in the CA3 region induced short- and long-lasting ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00248508
更新日期：1988-01-01 00:00:00
abstract：:Changes in cognition due to age have been associated with falls and reduced standing postural control. Sensory integration is one component of postural control that may be influenced by certain aspects of cognitive functioning. This study investigated associations between measures of cognitive function and sensory int...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-018-5394-0
更新日期：2019-01-01 00:00:00
abstract：:Dynamic changes of deficits in canal and otolith vestibulo-ocular reflexes (VORs) to high acceleration, eccentric yaw rotations were investigated in five subjects aged 25-65 years before and at frequent intervals 3-451 days following unilateral vestibular deafferentation (UVD) due to labyrinthectomy or vestibular neur...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0761-7
更新日期：2007-04-01 00:00:00
abstract：:Previous evidence based on perceptual integration and arbitrary responses suggests extensive cross-modal links in attention across the various modalities. Attention typically shifts to a common location across the modalities, despite the vast differences in their initial coding of space. An issue that remains unclear ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-005-0240-6
更新日期：2006-04-01 00:00:00
abstract：:Single-neuron activities were recorded in the hindlimb region of the primary somatosensory cortex and part of area 5 in awake Japanese monkeys. A total of 1050 units were isolated from five hemispheres of four animals. Receptive fields (RFs) and submodalities were identified for 90% of isolated neurons in areas 3a and...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210000464
更新日期：2000-09-01 00:00:00
abstract：:The study was conducted to investigate the difference between Han Chinese and Caucasians on various parameters measured from responses to transcranial magnetic brain stimulation (TMS). Sixteen subjects were studied in each group. A circular coil at the vertex was used for stimulation, whilst recording surface electrom...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-013-3763-2
更新日期：2014-02-01 00:00:00
abstract：:During the course of an in vivo intracellular labeling study, a chandelier (axo-axonic) cell was completely filled with biocytin in the CA1 region of the hippocampus. Chandelier cells are known to provide GABAergic terminals exclusively to the axon initial segment of pyramidal cells. The lateral extent and laminar dis...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230934
更新日期：1992-01-01 00:00:00
abstract：:Following an almost total chemical lesion of the inferior olive, the inhibitory control of the cerebellar Purkinje cells upon their target neurones, mainly in Deiters nucleus, remains practically unchanged. This result is at variance with some recent findings having important implications in the cerebellar theories of...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236909
更新日期：1981-01-01 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
pub_type： 杂志文章
doi：10.1007/s00221-010-2214-6
更新日期：2010-05-01 00:00:00
abstract：:Discharges of muscle spindle afferents from the soleus muscle were studied in kittens aged 1-21 days and in adult cats. Vibration applied longitudinally to the tendon elicited one impulse for each cycle of vibration over the range 1-200 Hz for the kittens and up to 450 Hz for the adult. Threshold amplitudes were gener...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00406620
更新日期：1988-01-01 00:00:00
abstract：:When asked to identify the position of a sound, listeners can report its perceived location as well as their subjective certainty about this spatial judgement. Yet, research to date focused primarily on measures of perceived location (e.g., accuracy and precision of pointing responses), neglecting instead the phenomen...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-020-05748-4
更新日期：2020-03-01 00:00:00
abstract：:This study was undertaken to elucidate neural control of the arterial blood pressure (ABP) in head-down postural change which causes both stimulation to the vestibular system and head-ward fluid shift. Experiments were carried out with urethane-anesthetized rabbits. The animal was mounted on a tilting table, tilted to...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-009-1732-6
更新日期：2009-04-01 00:00:00
abstract：:Retinal ganglion cells of adult cats have the potential to regenerate their axons into autografted peripheral nerve. Two months after transplantation of the sciatic nerve to the axotomized optic stump, regenerated axons were labeled anterogradely with biocytin, and myelin formation by Schwann cells was examined electr...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229107
更新日期：1994-01-01 00:00:00
abstract：:Upright stance has allowed for substantial flexibility in how the upper limbs interact with each other: the arms can be coordinated in alternating, synchronous, or asymmetric patterns. While synchronization is thought to be the default mode of coordination during bimanual movement, there is little evidence for any bil...
journal_title：Experimental brain research
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00221-011-2687-y
更新日期：2011-06-01 00:00:00
abstract：:Microelectrode recordings were made from dorsal column postsynaptic (DCPS) fibres, in the fasciculus gracilis of the cat, at thoracic level Th 12, and from single cells in the nucleus gracilis. The sensitivity of the fibres (Th 12) and cells (bulbar level) to both gentle and noxious stimuli was studied and a classific...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237349
更新日期：1975-05-22 00:00:00
abstract：:The present study aimed to elucidate the distribution of ferric and ferrous iron in the hippocampus after kainate-induced neuronal injury. A modified Perl's or Turnbull's blue histochemical stain was used to demonstrate Fe3+ and Fe2+ respectively. Very light staining for iron was observed in the hippocampus, in normal...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-001-0971-y
更新日期：2002-03-01 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
pub_type： 杂志文章
doi：10.1007/BF00239811
更新日期：1978-04-14 00:00:00
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 t...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00239377
更新日期：1982-01-01 00:00:00
abstract：:The effects of electrical stimulation of the cerebral cortex on the monosynaptic jaw closing and the disynaptic jaw opening reflexes were studied in cats anaesthetized with chloralose. The time course of the reflex effects was recorded. Similar rhythmic sequences of facilitation and inhibition were observed in both re...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237546
更新日期：1980-01-01 00:00:00
abstract：:The topography and receptive field (RF) organization of neurones in the trunk zone of the thalamic ventrobasal complex (VB) projecting to the homologous zone of the ipsilateral first somatosensory area (SI) were studied in the cat by performing experiments of retrograde neuronal tracing and microelectrode recording. P...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236234
更新日期：1984-01-01 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
pub_type： 杂志文章
doi：10.1007/s002210050313
更新日期：1998-03-01 00:00:00
abstract：:The distribution of anterogradely-labeled fibers and retrogradely-labeled cell bodies in the interpeduncular nucleus (IPN) was mapped after injections of wheat-germ agglutinin conjugated to horseradish peroxidase (WGA-HRP) into various structures of the basal forebrain in adult rats. WGA-HRP injections into the medial...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00279657
更新日期：1988-01-01 00:00:00
abstract：:An aberrant crossed corticotectal pathway can be generated by removal of one visual cortex and the contralateral superior colliculus from newborn rats. This aberrant crossed corticotectal projection arises from the pyramidal neurons located in layer V of the visual cortex and terminates in a spatially orderly manner i...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235562
更新日期：1978-11-15 00:00:00
abstract：:In many daily situations, balance control is associated with a cognitive activity such as reading or a simple calculation. The objective of this study was to investigate the relationship between these two specific human activities, especially the influence of visual cues and support surface stability on body sway duri...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-014-3913-1
更新日期：2014-07-01 00:00:00
abstract：:Experiments were carried out in urethane-anaesthetised rats to investigate whether GABA is involved in mediating inhibition of neuronal activity in the dorsal half of the periaqueductal grey matter (PAG) after stimulation of the serotonin-containing projection to the PAG from nucleus raphe obscurus (NRO). Multibarrell...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210000627
更新日期：2001-03-01 00:00:00
abstract：:Cell responses to complex visual patterns such as compositions of broad-band (non-monochromatic) colour areas are presented. Patterns were scanned over the receptive field, and cell response at each point was recorded. "Response patterns" were constructed which display the cell transform of the stimulus pattern. Parvo...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00239571
更新日期：1982-01-01 00:00:00
abstract：:Chronic loss of vestibular function modifies the role of neck afferents in human perception of self-motion. We characterized this change by comparing the self-motion perception of patients with chronic vestibular loss (Ps) to that of normal subjects (Ns). Stimuli consisted of sinusoidal horizontal rotations (0.025-0.4...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227147
更新日期：1993-01-01 00:00:00
abstract：:Judgments on laterality of hand stimuli are faster and more accurate when dealing with one's own than others' hand, i.e. the self-advantage. This advantage seems to be related to activation of a sensorimotor mechanism while implicitly processing one's own hands, but not during explicit one's own hand recognition. Here...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-015-4210-3
更新日期：2015-04-01 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
