Abstract：
:Discrete wavelet analysis is used to resolve the center of pressure time series data into several timescale components, providing new insights into postural control. Healthy young and elderly participants stood quietly with their eyes open or closed and either performed a secondary task or stood quietly. Without vision, both younger and older participants had reduced energy in the long timescales, supporting the concept that vision is used to control low frequency postural sway. Furthermore, energy was increased at timescales corresponding to closed-loop (somatosensory and vestibular) and open-loop mechanisms, consistent with the idea of a shift from visual control to other control mechanisms. However, a relatively greater increase was observed for older adults. With a secondary task a similar pattern was observed-increased energy at the short and moderate timescales, decreased energy at long timescales. The possibility of a common strategy-at the timescale level-in response to postural perturbations is considered.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Chagdes JR,Rietdyk S,Haddad JM,Zelaznik HN,Raman A,Rhea CK,Silver TAdoi
10.1007/s00221-009-1915-1subject
Has Abstractpub_date
2009-08-01 00:00:00pages
297-310issue
3eissn
0014-4819issn
1432-1106journal_volume
197pub_type
杂志文章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
abstract：:Extracellular recordings were made from the nucleus ambiguous in three conscious Macaca nemestrina monkeys during spontaneous vocalizations and swallows. The temporal relationship of neuronal activity to swallowing was inferred through correlation with the thyroarytenoid electromyographic (EMG) activity. Videofluorosc...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227276
更新日期：1994-01-01 00:00:00
abstract：:Accurate information about gaze direction is required to direct the hand towards visual objects in the environment. In the present experiments, we tested whether retinal inputs affect the accuracy with which healthy subjects indicate their gaze direction with the unseen index finger after voluntary saccadic eye moveme...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1029-5
更新日期：2002-06-01 00:00:00
abstract：:In natural environments depth-related information has to be extracted very fast from binocular disparity even if cues are presented shortly. However, few studies used efMRI to study depth perception. We therefore analyzed extension and localization of activation evoked by depth-by-disparity stimuli that were displayed...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-009-1844-z
更新日期：2009-07-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002219900295
更新日期：2000-03-01 00:00:00
abstract：:Here we aim to evaluate the ability of transcranial direct current stimulation (tDCS), which is applied over Wernicke's area and its right homologue, to influence lexical decisions and semantic priming and establish an involvement for temporo-parietal areas in lexical and semantic processing. Thirty-two subjects (17 w...
journal_title：Experimental brain research
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00221-013-3416-5
更新日期：2013-04-01 00:00:00
abstract：:Single unit activity was recorded in the striate cortex of vision-deprived cats aged between 3 and 8 weeks. Contrast sensitivity or response measurements made using moving sinusoidal gratings were used to construct spatial frequency tuning curves. At 3 weeks sensitivity, selectivity (assessed both as the narrowness of...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235273
更新日期：1984-01-01 00:00:00
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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：:Antisaccades have not only longer latencies but also lower peak velocities than prosaccades. It is not known whether these latency and velocity differences are related. Studies of non-human primates suggest that prosaccade peak velocity declines as latency from target appearance increases. We examined whether a simila...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-004-1940-z
更新日期：2004-11-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-015-4304-y
更新日期：2015-08-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：2009-10-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0408-8
更新日期：2006-09-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00247518
更新日期：1988-01-01 00:00:00
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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：:We previously demonstrated that velocity and movement time for the initial segment for a two-stroke movement are scaled in relation to the difficulty of the second segment. The interdependent kinematic changes were interpreted as evidence that movement planning/organization processes consider the movement parameters o...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210000450
更新日期：2000-09-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237481
更新日期：1986-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-014-3873-5
更新日期：2014-06-01 00:00:00
abstract：:The short-latency electromyographic response evoked by transcranial magnetic stimulation (MEP) increases in size during fatigue, but the mechanisms are unclear. Because large changes occur in the muscle action potential, we tested whether changes in the response to stimulation of the peripheral motor nerve could fully...
journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
doi：10.1007/s002210050779
更新日期：1999-07-01 00:00:00
abstract：:This study examined perception-action learning in younger adults in their 20s compared to older adults in their 70s and 80s. The goal was to provide, for the first time, quantitative estimates of perceptuo-motor learning rates for each age group and to reveal how these learning rates change between these age groups. W...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-012-3349-4
更新日期：2013-03-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228958
更新日期：1991-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230204
更新日期：1993-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2451-8
更新日期：2011-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237074
更新日期：1980-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-001-0946-z
更新日期：2002-02-01 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：:It has been proposed that visually guided reaching movements performed in the lower visual field (LVF) of peripersonal space are more effective and efficient than their upper visual field (UVF) counterparts (Danckert and Goodale 2001). In the present investigation we sought to determine whether this purported visual f...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0386-x
更新日期：2006-03-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229634
更新日期：1996-06-01 00:00:00
abstract：:Theta burst stimulation (TBS) is a special repetitive transcranial magnetic stimulation (rTMS) paradigm, where bursts of low-intensity stimuli are applied in the theta frequency. The aim of this study was to investigate the effect of neuronavigated TBS over primary somatosensory cortex (SI) on laser-evoked potentials ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-007-1188-5
更新日期：2008-03-01 00:00:00
abstract：:Neuromagnetic fields from the left cerebral hemisphere of five healthy, right-handed subjects were investigated under three different experimental conditions: (1) electrical stimulation of the right index finger (task S); (2) voluntary movement of the same finger (M); (3) M+S condition, consisting of voluntary movemen...
journal_title：Experimental brain research
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/BF00230430
更新日期：1996-01-01 00:00:00
abstract：:To investigate how the sensorimotor systems of eye and hand use position, velocity, and timing information of moving targets, we conducted a series of three experiments. Subjects performed combined eye-hand catch-up movements toward visual targets that moved with step-ramp-like velocity profiles. Visual feedback of th...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-004-2028-5
更新日期：2005-01-01 00:00:00
