Positive and negative motor signs of head motion in cerebral palsy an analysis based on a wearable inertial human computer interface

Raya, Rafael; Rocón, Eduardo; Ceres, R.; Belda, Juan Manuel; Laparra, José Moisés

doi:10.1109/brc.2013.6487540

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…We measured the maximum head rotation range in the three defined planes and we found that its value in the frontal plane was 34º, 39º in the transversal, and in 28º in the sagittal. In a study presented by Raya et al, they measured the ROM while users severely affected by motor disorders controlled a computer thought their head movements [11]. They measured a ROM value of 25º in the frontal plane, 26º in the sagittal and 32º in the transversal.…”

Section: Discussionmentioning

confidence: 99%

Head movement assessment of cerebral palsy users with severe motor disorders when they control a computer thought eye movements

Clemotte¹,

Velasco²,

Rocón³

2020

XXXVIII Jornadas De Automática: Gijón, 6, 7, Y 8 De Septiembre De 2017

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Todos los derechos reservados. De conformidad con lo dispuesto en la legislación vigente, podrán ser cas�gados con penas de multa y privación de libertad quienes reproduzcan o plagien, en todo o en parte, una obra literaria, ar�s�ca o cien�fica, fijada en cualquier �po y soporte, sin la precep�va autorización. JA2017 Prefacio Prefacio Las Jornadas de Automática se celebran desde hace 40 años en una universidad nacional facilitando el encuentro entre expertos en estaárea en un foro que permite la puesta en común de las nuevas ideas y proyectos en desarrollo. Al mismo tiempo, propician la siempre necesaria colaboración entre investigadores delámbito de la Ingeniería de Control y Automática, así como de campos afines, a la hora de abordar complejos proyectos de investigación multidisciplinares. En esta ocasión, las Jornadas estarán organizadas por la Universidad de Oviedo y se han celebrado del 6 al 8 de septiembre de

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Section: Discussionmentioning

confidence: 99%

Head movement assessment of cerebral palsy users with severe motor disorders when they control a computer thought eye movements

Clemotte¹,

Velasco²,

Rocón³

2020

XXXVIII Jornadas De Automática: Gijón, 6, 7, Y 8 De Septiembre De 2017

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show abstract

“…Prior to this study, Raya et al (2013) and Velasco et al (2016) had used the inertial interface ENLAZA for the assessment of impairment. Two metrics were proposed: the frequency of movement and the ROM of user's head.…”

Section: The Enlaza Interfacementioning

confidence: 99%

Human-computer interaction for users with cerebral palsy based on head orientation. Can cursor’s movement be modeled by Fitts’s law?

Velasco

Clemotte

Raya

et al. 2017

International Journal of Human-Computer Studies

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This paper presents an experiment to validate a head-mounted inertial interface for human-computer interaction (HCI) developed for people with cerebral palsy (CP). The method is based on Fitts's law, an empirical model of human motor performance for aimed movements. Head motion is recorded in a series of goal-crossing tasks and a regression model of the movement time (MT) is estimated for each user. Values of R 2 above 0.9 are indicators of a strong correlation of those motion patterns with the linear model proposed by Fitts. The analysis of MT confirmed that head movements of users without disability follow Fitts's law and showed that 3 users with CP (MACS IV and V) had the same behavior. There was a weaker correlation (R 2 =0.839) for one individual with cervical dystonia and ballistic movements and no correlation for two users with cervical hypotonia and dyskinetic CP. Results show the impact of ballistic movements and poor postural control in computer interaction. They also provide the foundation for new interaction techniques to develop a universal computer interface for motor impaired users.

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“…Two metrics for the quantification of positive and negative motor signs were proposed in previous studies: frequency of movement and ROM of user's head [8], [23]. ROM is defined as the difference between the maximum and minimum Euler angles measured in one of the anatomical planes: frontal, sagittal, or transverse (Euler angles a, ¡3, and 7).…”

Section: Assessment Of Impairmentmentioning

confidence: 99%

Positive and Negative Motor Signs of Head Motion in Cerebral Palsy: Assessment of Impairment and Task Performance

Velasco

Raya

Ceres

et al. 2016

IEEE Systems Journal

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Abstract-This paper analyzes the presence of positive and negative motor signs in people with cerebral palsy (CP). Positive motor signs are those that lead to involuntarily increased frequency or magnitude of muscle activity. Negative motor signs describe insufficient muscle activity or insufficient control of muscle activity. In this paper, a head-mounted alternative computer interface based on inertial technology was used to assess motor signs in seven users with CP. Task performance and control of posture was related to the impairment. There are no significant differences between users with CP and healthy control participants in the frequency domain of the head movement. Results suggest that this kind of motor disorders is not related to positive motor signs. Moreover, a control mode based on posture more than on movements is not optimum; an alternative control mode must be specially designed for users with poor postural control.

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Positive and negative motor signs of head motion in cerebral palsy an analysis based on a wearable inertial human computer interface

Cited by 4 publications

References 7 publications

Head movement assessment of cerebral palsy users with severe motor disorders when they control a computer thought eye movements

Head movement assessment of cerebral palsy users with severe motor disorders when they control a computer thought eye movements

Human-computer interaction for users with cerebral palsy based on head orientation. Can cursor’s movement be modeled by Fitts’s law?

Positive and Negative Motor Signs of Head Motion in Cerebral Palsy: Assessment of Impairment and Task Performance

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