Abstract：
:Rhythmic interlimb coordination is characterized by attraction to stable phase and frequency relations. Sudden, unintended transitions between such coordination patterns have been observed in iso- and multifrequency tasks when movement frequency was gradually increased. These transitions have been accounted for by modeling the two limbs as nonlinearly coupled oscillators. The prevailing form of the coupling function is based on time derivatives, but an alternative formulation can be derived by incorporating time delays. These time delays may be related to the neurophysiological delays associated with the use of kinesthetic afferences. The two ways of deriving coupling functions for interlimb coordination allow for different predictions with respect to the effects of movement frequency and amplitude on the strength of interaction between the limbs. In the current experiment, the effects of amplitude and frequency were dissociated experimentally, so as to arrive at an empirically motivated choice between the two ways of formalizing interlimb coupling. Subjects tapped the polyrhythm 2:3 at five different frequencies under three amplitude conditions. Whereas no effects of amplitude were observed, the strength of interaction between the hands decreased with increasing movement frequency. These results support the time-delay version of the model, in which differential (loss of) stability of coordination modes results from differential dependence on movement amplitude, but overall coupling strength is related reciprocally to movement frequency squared. This version of the model was related tentatively to three proposed aspects of interlimb coordination: (1) neurophysiological delays associated with the use of kinesthetic afferences; (2) rate-dependent decrease in pattern stability; and (3) differential entrainment influences of kinesthetic signals.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Peper CE,Beek PJdoi
10.1007/s002210050257subject
Has Abstractpub_date
1998-01-01 00:00:00pages
78-92issue
1eissn
0014-4819issn
1432-1106journal_volume
118pub_type
临床试验,杂志文章,随机对照试验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：:Activities of 53 neurons in the brain stem were recorded with chronically implanted fine wires in freely eating and drinking rats. Twenty units were isolated from the trigeminal mesencephalic nucleus; 18 were spindle afferents and 2 periodontal afferents. The spindle units were classified into 4 types: 5 units showed ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00247896
更新日期：1989-01-01 00:00:00
abstract：:Electron microscopic examination of the monkey lateral geniculate nucleus, pars dorsalis (LGNd) reveals the occurrence of synaptic contacts between profiles belonging to interneurons (I-cells). Almost all combinations are observed, namely, axodendritic, dendrodendritic, dendrosomatic and somatodendritic, the most freq...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237322
更新日期：1976-05-10 00:00:00
abstract：:Movement sequences such as typing or tapping display important interactions among finger movements arising from anticipatory motion (preparing for upcoming events) and coupling (non-independence among fingers). We examined pianists' finger tapping for the influence of cognitive chunking processes and biomechanical cou...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0760-8
更新日期：2007-04-01 00:00:00
abstract：:Several recent studies indicate that saccades elicited in the absence of a visual target are slower than visually-guided movements of the same size. In addition, we have shown earlier that the slower saccades observed in two different paradigms had more asymmetrical (skewed) velocity profiles. Recently, it has been re...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00253624
更新日期：1989-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237155
更新日期：1983-01-01 00:00:00
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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
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-020-06009-0
更新日期：2021-01-04 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00231153
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
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更新日期：2013-10-01 00:00:00
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pub_type： 杂志文章
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更新日期：2018-12-01 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：2008-08-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-013-3693-z
更新日期：2013-11-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237552
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/s00221-010-2448-3
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/BF00237590
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/pl00005691
更新日期：1997-06-01 00:00:00
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pub_type： 杂志文章
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更新日期：2012-12-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1366-4
更新日期：2003-04-01 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：1989-01-01 00:00:00
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pub_type： 杂志文章
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更新日期：2018-01-01 00:00:00
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更新日期：1985-01-01 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：2003-01-01 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：2013-12-01 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：2009-09-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050515
更新日期：1998-10-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-005-0275-8
更新日期：2006-05-01 00:00:00
abstract：:The presence of after-effects in adaptation tasks implies that an existing internal model has been updated. Previously, we showed that although observers adapted to a visuomotor perturbation, they did not show after-effects. In this experiment, we tested 2 further observer groups and an actor group. Observers were now...
journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：2012-04-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00238231
更新日期：1983-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236602
更新日期：1981-01-01 00:00:00
