Automatic detection of movement disorders using recordings of rapid alternating movements

Fimbel, Eric; Domingo, Pedro Perez; Lamoureux, Daniel; Beuter, Anne

doi:10.1016/j.jneumeth.2005.02.007

Cited by 20 publications

(5 citation statements)

References 31 publications

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“…DDK is also known as alternate motion rates (AMR) or sequential motor rates (SMR), both of which measure the speed necessary to stop a determined motor impulse and substitute it with its opposite (10); thus, DDK tasks are considered tests of neurological ability. According to the specific literature, DDK provides an acoustical index of motion speed and articulatory placement, reflecting both neuromotor maturation and the integration of structures involved in speech, such as the lips and tongue (11). Laryngeal function can also be assessed by analyzing the control of rapid and rhythmic movements of the vocal folds – i.e., their opening and closing (12).…”

Section: Introductionmentioning

confidence: 99%

Acoustic analyses of diadochokinesis in fluent and stuttering children

Juste¹,

Rondon²,

Sassi³

et al. 2012

Clinics

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OBJECTIVES:The purpose of the study was to acoustically compare the performance of children who do and do not stutter on diadochokinesis tasks in terms of syllable duration, syllable periods, and peak intensity.METHODS:In this case-control study, acoustical analyses were performed on 26 children who stutter and 20 aged-matched normally fluent children (both groups stratified into preschoolers and school-aged children) during a diadochokinesis task: the repetition of articulatory segments through a task testing the ability to alternate movements. Speech fluency was assessed using the Fluency Profile and the Stuttering Severity Instrument.RESULTS:The children who stutter and those who do not did not significantly differ in terms of the acoustic patterns they produced in the diadochokinesis tasks. Significant differences were demonstrated between age groups independent of speech fluency. Overall, the preschoolers performed poorer. These results indicate that the observed differences are related to speech-motor age development and not to stuttering itself.CONCLUSIONS:Acoustic studies demonstrate that speech segment durations are most variable, both within and between subjects, during childhood and then gradually decrease to adult levels by the age of eleven to thirteen years. One possible explanation for the results of the present study is that children who stutter presented higher coefficients of variation to exploit the motor equivalence to achieve accurate sound production (i.e., the absence of speech disruptions).

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Section: Introductionmentioning

confidence: 99%

Acoustic analyses of diadochokinesis in fluent and stuttering children

Juste¹,

Rondon²,

Sassi³

et al. 2012

Clinics

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“…Instead of 1-cuts, the cores may be defined as α-cuts (i.e., relative frequencies > = α are in the core), which provides tolerance to a given proportion of random errors. Then, the threshold α may be adjusted automatically to the data set, so that the resulting cores are stable, e.g., by means of the plateaus method [39] . Automatic adjustment of parameters is strongly recommended, because manually-adjusted parameters decrease the significance of the results, just like arbitrary assumptions decrease the significance of a theory.…”

Section: Discussionmentioning

confidence: 99%

Certainty in Categorical Judgment of Size

2009

Self Cite

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The certainty of judgment (or self-confidence) has been traditionally studied in relation with the accuracy. However, from an observer's viewpoint, certainty may be more closely related to the consistency of judgment than to its accuracy: consistent judgments are objectively certain in the sense that any external observer can rely on these judgments to happen. The regions of certain vs. uncertain judgment were determined in a categorical rating experiment. The participants rated the size of visual objects on a 5-point scale. There was no feedback so that there were no constraints of accuracy. Individual data was examined, and the ratings were characterized by their frequency distributions (or categories). The main result was that the individual categories always presented a core of certainty where judgment was totally consistent, and large peripheries where judgment was inconsistent. In addition, the geometry of cores and boundaries exhibited several phenomena compatible with the literature on visual categorical judgment. The ubiquitous presence of cores in absence of accuracy constraints provided insights about objective certainty that may complement the literature on subjective certainty (self-confidence) and the accuracy of judgment.

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“…Subjects were then asked to repeat the phonemes /pǝ/, /tǝ/, and /kǝ/ as rapidly as possible and for as long as possible at a comfortable pitch and loudness. This test is used for the clinical assessment of speech motor function [ 18 ]. Diadochokinesis (DDK) can be used to measure syllable timing and rhythm in speech [ 19 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of Repetitive Transcranial Magnetic Stimulation on Patients With Dysarthria After Subacute Stroke

et al. 2015

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ObjectiveTo evaluate whether repetitive transcranial magnetic stimulation (rTMS) could improve dysarthria in stroke patients at the subacute stage.MethodsThis study was a prospective, randomized, double-blind controlled trial. Patients who had unilateral middle cerebral artery infarction were enrolled. In patients in the rTMS group, we found hot spots by searching for the evoked motor potential of the orbicularis oris on the non-affected side. We performed rTMS at a low frequency (1 Hz), 1,500 stimulations/day, 5 days a week for 2 weeks on the hotspots. We used the same protocol in the sham stimulation group patients as that in the rTMS group, except that the angle of the coil was perpendicular to the skull rather than tangential to it. The patients in both groups received speech therapy for 30 minutes, 5 days a week from a skilled speech therapist. The speech therapist measured the Urimal Test of Articulation and Phonology, alternative motion rates, sequential motion rates, and maximal phonation time before and after intervention sessions.ResultsForty-two patients were enrolled in this study and 20 completed the study. Statistical analysis revealed significant improvements on the dysarthria scales in both groups. The sequential motion rate (SMR)-PǝTǝKǝ showed significantly greater improvement in the rTMS group patients than in the sham stimulation group.ConclusionPatients in the rTMS group showed greater improvement in articulation than did patients in the sham rTMS group. Therefore, rTMS can have a synergistic effect with speech therapy in treating dysarthria after stroke.

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Automatic detection of movement disorders using recordings of rapid alternating movements

Cited by 20 publications

References 31 publications

Acoustic analyses of diadochokinesis in fluent and stuttering children

Acoustic analyses of diadochokinesis in fluent and stuttering children

Certainty in Categorical Judgment of Size

Effect of Repetitive Transcranial Magnetic Stimulation on Patients With Dysarthria After Subacute Stroke

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