Vertical Finger Displacement Is Reduced in Index Finger Tapping During Repeated Bout Rate Enhancement

Mora-Jensen, Mark Holten; Madeleine, Pascal; Hansen, Ernst Albin

doi:10.1123/mc.2016-0037

Cited by 7 publications

(23 citation statements)

References 31 publications

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“…Thus, it was reported that a cumulating increase of the freely chosen tapping frequency of approximately 8% occurs across four bouts of tapping, which were all separated by 10 min rest periods ( Hansen et al, 2015 ). The finding was recently replicated ( Mora-Jensen et al, 2017 ). Our previous studies ( Hansen et al, 2015 ; Mora-Jensen et al, 2017 ) inspired us to formulate hypotheses regarding the mechanism causing repeated bout rate enhancement.…”

Section: Introductionmentioning

confidence: 77%

“…The finding was recently replicated ( Mora-Jensen et al, 2017 ). Our previous studies ( Hansen et al, 2015 ; Mora-Jensen et al, 2017 ) inspired us to formulate hypotheses regarding the mechanism causing repeated bout rate enhancement. It was, for example, suggested that the rate enhancement was caused by a net excitation of the spinal CPG ( Finkel et al, 2014 ), the supraspinal centres ( De Luca and Erim, 1994 ), or a combination of the two.…”

Section: Introductionmentioning

confidence: 77%

“…For detailed descriptions, the reader is referred to a previous publication ( Sardroodian et al, 2016 ). The participant performed tapping with the index finger of the right hand at a freely chosen frequency, while the remaining four fingers of the right hand were in an extended position and resting state on the table ( Hansen et al, 2015 ; Sardroodian et al, 2016 ; Mora-Jensen et al, 2017 ). It was emphasized that the tapping should not be performed as fast as possible, but rather at the participant’s “own preferred rhythm” while at the same time “thinking about something else.” Besides, the participant did not receive any particular instruction about maintaining a constant tapping frequency throughout the tapping bouts.…”

Section: Methodsmentioning

confidence: 99%

“…In this way, the machine could provide passive extension–flexion movement of the finger in the vertical plane. The magnitude of vertical displacement during the passive tapping was set to 24 mm, based on previous findings ( Mora-Jensen et al, 2017 ). The exact tapping frequency during the passive tapping bout corresponded to the tapping frequency that the participant had chosen during the first tapping bout in Session A.…”

Section: Methodsmentioning

confidence: 99%

“…Though, it is considered that control of rhythmic movement is similar in animals and humans ( Dimitrijevic et al, 1998 ; Zehr, 2005 ; Hansen, 2015 ). To increase our understanding, studies applying reflex modulation during, for example, arm cycling and pedalling ( Zehr et al, 2007 ; Hundza and Zehr, 2009 ), voluntary pedalling ( Sakamoto et al, 2007 ; Hansen and Ohnstad, 2008 ; Stang et al, 2016 ), and finger tapping ( Shima et al, 2011 ; Hansen et al, 2015 ; Mora-Jensen et al, 2017 ) have been performed. Such studies reflect that investigation of CPG-mediated voluntary rhythmic movement in humans is challenged by the restricted access to the spinal cord ( Dietz, 2003 ; Zehr, 2005 ).…”

Section: Introductionmentioning

confidence: 99%

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Repeated Bout Rate Enhancement Is Elicited by Various Forms of Finger Tapping

et al. 2018

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Voluntary rhythmic movements, such as, for example, locomotion and other cyclic tasks, are fundamental during everyday life. Patients with impaired neural or motor function often take part in rehabilitation programs, which include rhythmic movements. Therefore, it is imperative to have the best possible understanding of control and behaviour of human voluntary rhythmic movements. A behavioural phenomenon termed repeated bout rate enhancement has been established as an increase of the freely chosen index finger tapping frequency during the second of two consecutive tapping bouts. The present study investigated whether the phenomenon would be elicited when the first bout consisted of imposed passive finger tapping or air tapping. These two forms of tapping were applied since they can be performed without descending drive (passive tapping) and without afferent feedback related to impact (air tapping) – as compared to tapping on a surface. Healthy individuals (n = 33) performed 3-min tapping bouts separated by 10 min rest. Surface electromyographic, kinetic, and kinematic data were recorded. Supportive experiments were made to measure, for example, the cortical sensory evoked potential (SEP) response during the three different forms of tapping. Results showed that tapping frequencies in the second of two consecutive bouts increased by 12.9 ± 14.8% (p < 0.001), 9.9 ± 6.0% (p = 0.001), and 16.8 ± 13.6% (p = 0.005) when the first bout had consisted of tapping, passive tapping, and air tapping, respectively. Rate enhancement occurred without increase in muscle activation. Besides, the rate enhancements occurred despite that tapping, as compared with passive tapping and air tapping, resulted in different cortical SEP responses. Based on the present findings, it can be suggested that sensory feedback in an initial bout increases the excitability of the spinal central pattern generators involved in finger tapping. This can eventually explain the phenomenon of repeated bout rate enhancement seen after a consecutive bout of finger tapping.

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