The assessment of limb dyspraxia

Miller, Niklas

doi:10.1177/026921558800200301

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…This suggests that activity patterns from these sources also contained information about the finger press being executed during sequence production, although the size of the effect was eclipsed by the concurrent representation of finger press identity in contralateral S1/M1 regions. In contrast, the probabilities in central sensors, as well as contralateral S1/M1 during preparation did not show any evidence for a competitive queuing gradient (sensor level: one-way repeated measures ANOVA, F(2.32, 17.77) = 0.37, p = .72, η 2 = 0.024; Greenhouse-Geisser corrected, X (9) = 21.58, p = .01; source level: F(3, 32.18) = 1.82, p = .16, η2 = 0.108; Greenhouse-Geisser corrected, X (9) = 18.71, p = .03), suggesting that contralateral neocortical sensorimotor areas did not contribute to establishing the temporal order of finger presses before execution. In sum, our results indicate the special role of the parahippocampal and effector-related cerebellar sources in establishing a competitive queuing gradient during sequence preparation and its utilization during sequence execution, whilst contralateral primary sensorimotor sources appear to contribute to the task during sequence execution only.…”

Section: Resultsmentioning

confidence: 83%

Neural competitive queuing of ordinal structure underlies skilled sequential action

Kornysheva

Bush

Meyer

et al. 2018

Preprint

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The fluent retrieval and production of movement sequences is essential for a variety of daily activities such as speech, tool-use, musical and athletic performance, but the neural mechanisms underlying sequence planning remain elusive. Here, participants learned sequences of finger presses with different timings and different finger orders, and reproduced them in a magneto-encephalography (MEG) scanner. We classified the MEG patterns immediately preceding each press in the sequence, and examined their dynamics over the production of the whole sequence. Our results confirm a role for the ‘competitive queuing’ of upcoming action representations in the production of learned motor sequences, extending previous computational and non-human primate recording studies to non-invasive measures in humans. In addition, we show that competitive queuing does not simply reflect specific motor actions, but representations of higher-level sequential order that generalise across different motor sequences. Finally, we show that the quality of competitive queuing predicts participants’ production accuracy, and originates from parahippocampal and cerebellar sources. These results suggest that the brain learns and produces multiple behavioural sequences by flexibly combining representations of specific actions with more abstract, parallel representations of sequential structure.

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Section: Resultsmentioning

confidence: 83%

Neural competitive queuing of ordinal structure underlies skilled sequential action

Kornysheva

Bush

Meyer

et al. 2018

Preprint

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“…EJC demonstrated slowed but accurate performance on tasks involving attention switching (Davies, 1968). There were no signs of limb or oral apraxia (Miller, 1988) on imitation or production of both isolated and sequential real and nonsense gestures. Writing and drawing were unaltered from before the haemorrhage.…”

Section: Neuropsychological Historymentioning

confidence: 90%

What makes acquired foreign accent syndrome foreign?

Miller

Lowit

O’Sullivan

2006

Journal of Neurolinguistics

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“…This study included a large number of patients but all the right hemiplegic patients were aphasic, suggesting that language ability may also have been correlated with apraxia and ADL ability. Miller (1988) explained that dyspraxia is not the only reason for failure of execution of tasks but that several other disorders may account for this and may coexist with dyspraxia, namely dysphasia in that the patient may not have understood the instruction, impaired visual spatial functioning, attention, concentration or intellectual capacity.…”

Section: Apraxiamentioning

confidence: 99%