Rafael Raya

Mr. Rafael Raya


Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 August 2018 in Sensors
Verified
Journal Article
Open access
PDF file
RRRafael Raya
Rafael Raya
Rodrigo García-CarmonaRodrigo García-Carmona
Rodrigo García-Carmona
CSCristina Sánchez
Cristina Sánchez
EJEloy Urendes Jiménez
Eloy Urendes Jiménez
OROscar Ramirez
Oscar Ramirez
AOAbraham Otero
Abraham Otero
Neck injuries and the related pain have a high prevalence and represent an important health problem. To properly diagnose and treat them, practitioners need an accurate system for measuring Cervical Range Of Motion (CROM). This article describes the development and validation of an inexpensive, small (4 cm × 4 cm × 8 cm), light (< 200 g) and easy to use solution for measuring CROM using wearable inertial sensors. The proposed solution has been designed with the clinical practice in mind, after consulting with practitioners. It is composed of: (a) two wearable wireless MEMS-based inertial devices, (b) a recording and report generation software application and (c) a measurement protocol for assessing CROM. The solution provides accurate (none of our results is outside the ROM ranges when compared with previously published results based on an optical tracking device) and reliable measurements (ICC = 0.93 for interrater reliability when compared with an optical tracking device and ICC > 0.90 for test-retest reliability), surpassing the popular CROM instrument’s capabilities and precision. It also fulfills the needs for clinical practice attending to effectiveness, efficiency (4 min from setup to final report) and user’s satisfaction (as reported by practitioners). The solution has been certified for mass-production and use in medical environments.

1 August 2010 in Sensors and Actuators A: Physical
Verified
Journal Article
Closed access
RRRafael Raya
Rafael Raya
JRJ.O. Roa
J.O. Roa
EREduardo Rocon
Eduardo Rocon
RCR. Ceres
R. Ceres
JPJose L. Pons
Jose L. Pons

14 November 2016 in Journal of NeuroEngineering and Rehabilitation
Verified
Journal Article
Open access
PDF file
CBCristina Bayón
Cristina Bayón
Sergio Lerma LaraSergio Lerma Lara
Sergio Lerma Lara
ORO. Ramírez
O. Ramírez
José Ignacio SerranoJosé Ignacio Serrano
José Ignacio Serrano
María Dolores MesaMaría Dolores Mesa
María Dolores Mesa
EREduardo Rocon
Eduardo Rocon
Cerebral Palsy (CP) is a disorder of posture and movement due to a defect in the immature brain. The use of robotic devices as alternative treatment to improve the gait function in patients with CP has increased. Nevertheless, current gait trainers are focused on controlling complete joint trajectories, avoiding postural control and the adaptation of the therapy to a specific patient. This paper presents the applicability of a new robotic platform called CPWalker in children with spastic diplegia. CPWalker consists of a smart walker with body weight and autonomous locomotion support and an exoskeleton for joint motion support. Likewise, CPWalker enables strategies to improve postural control during walking. The integrated robotic platform provides means for testing novel gait rehabilitation therapies in subjects with CP and similar motor disorders. Patient-tailored therapies were programmed in the device for its evaluation in three children with spastic diplegia for 5 weeks. After ten sessions of personalized training with CPWalker, the children improved the mean velocity (51.94 ± 41.97 %), cadence (29.19 ± 33.36 %) and step length (26.49 ± 19.58 %) in each leg. Post-3D gait assessments provided kinematic outcomes closer to normal values than Pre-3D assessments. The results show the potential of the novel robotic platform to serve as a rehabilitation tool. The autonomous locomotion and impedance control enhanced the children’s participation during therapies. Moreover, participants’ postural control was substantially improved, which indicates the usefulness of the approach based on promoting the patient’s trunk control while the locomotion therapy is executed. Although results are promising, further studies with bigger sample size are required.

15 February 2008
Verified
Book Chapter
Closed access
PDF file
EREduardo Rocon
Eduardo Rocon
ARAndres Ruiz-Olaya
Andres Ruiz-Olaya
RRRafael Raya
Rafael Raya
ASA. Schiele
A. Schiele
JPJose L. Pons
Jose L. Pons
JMJuan C. Moreno
Juan C. Moreno

18 August 2017 in BioMedical Engineering OnLine
Verified
Journal Article
Open access
PDF file
MVMiguel Velasco
Miguel Velasco
RRRafael Raya
Rafael Raya
LMLuca Muzzioli
Luca Muzzioli
DMDaniela Morelli
Daniela Morelli
AOAbraham Otero
Abraham Otero
EREduardo Rocon
Eduardo Rocon
This paper presents the preliminary results of a novel rehabilitation therapy for cervical and trunk control of children with cerebral palsy (CP) based on serious videogames and physical exercise. The therapy is based on the use of the ENLAZA Interface, a head mouse based on inertial technology that will be used to control a set of serious videogames with movements of the head. Ten users with CP participated in the study. Whereas the control group (n = 5) followed traditional therapies, the experimental group (n = 5) complemented these therapies with a series of ten sessions of gaming with ENLAZA to exercise cervical flexion–extensions, rotations and inclinations in a controlled, engaging environment. The ten work sessions yielded improvements in head and trunk control that were higher in the experimental group for Visual Analogue Scale, Goal Attainment Scaling and Trunk Control Measurement Scale (TCMS). Significant differences (27% vs. 2% of percentage improvement) were found between the experimental and control groups for TCMS (p < 0.05). The kinematic assessment shows that there were some improvements in the active and the passive range of motion. However, no significant differences were found pre- and post-intervention. Physical therapy that combines serious games with traditional rehabilitation could allow children with CP to achieve larger function improvements in the trunk and cervical regions. However, given the limited scope of this trial (n = 10) additional studies are needed to corroborate this hypothesis.

1 November 2008 in Sensors and Actuators A: Physical
Verified
Journal Article
Closed access
RRRafael Raya
Rafael Raya
ANAnselmo Frizera Neto
Anselmo Frizera Neto
RCR. Ceres
R. Ceres
LCL. Calderón
L. Calderón
EREduardo Rocon
Eduardo Rocon