<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-0011</journal-id>
<journal-title><![CDATA[Revista de la Facultad de Medicina]]></journal-title>
<abbrev-journal-title><![CDATA[rev.fac.med.]]></abbrev-journal-title>
<issn>0120-0011</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-00112019000400665</article-id>
<article-id pub-id-type="doi">10.15446/revfacmed.v67n4.69456</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Variations in glenohumeral movement control when implementing an auditory feedback system: A pilot study]]></article-title>
<article-title xml:lang="es"><![CDATA[Variaciones en el control del movimiento glenohumeral al implementar un sistema de retroalimentación auditiva: un estudio piloto]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barramuño]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdés-Badilla]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guevara]]></surname>
<given-names><![CDATA[Exequiel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Chile Faculty of Health Sciences ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Chile Faculty of Education ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Católica del Maule Faculty of Education Sciences Department of Physical Activity Sciences]]></institution>
<addr-line><![CDATA[Talca ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de La Frontera Faculty of Medicine Department of Medical Specialties]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>67</volume>
<numero>4</numero>
<fpage>665</fpage>
<lpage>671</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-00112019000400665&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-00112019000400665&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-00112019000400665&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Human motor control requires a learning process and it can be trained by means of various sensory feedback sources.  Objective: To determine variations in glenohumeral movement control by learning in young adults exposed to an auditory feedback system while they perform object translation tasks classified by difficulty level.  Materials and methods: The study involved 45 volunteers of both sexes (22 women), aged between 18 and 32 years. Glenohumeral movement control was measured by means of the root mean square (RMS) of the accelerometry signal, while task execution speed (TES) was measured using an accelerometer during the execution of the task according to its difficulty (easy, moderate and hard) in four stages of randomized intervention (control, pre-exposure, exposure-with auditory feedback, and post-exposure).  Results: Statistically significant differences (p&lt;0.001) were found between the pre-exposure and exposure stages and between pre-exposure and post-exposure stages. A significant increase (p &lt;0.001) in TES was identified between the pre-exposure and exposure stages for tasks classified as easy and hard, respectively.  Conclusion: The use of an auditory feedback system in young adults without pathologies enhanced learning and glenohumeral movement control without reducing TES. This effect was maintained after the feedback, so the use of this type of feedback system in healthy individuals could result in a useful strategy for the training of motor control of the shoulder.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción. El control del movimiento humano requiere de un proceso de aprendizaje y puede ser entrenado por medio de la retroalimentación proveniente de diversas fuentes sensoriales.  Objetivo. Determinar variaciones en el control del movimiento glenohumeral por aprendizaje en adultos jóvenes sometidos a un sistema de retroalimentación auditiva, mientras realizan tareas de traslación de objetos clasificadas por nivel de dificultad.  Materiales y métodos. Participaron 45 voluntarios de ambos sexos (22 mujeres) entre 18 y 32 años. El control del movimiento glenohumeral se midió por medio de la raíz media cuadrática de acelerometría, mientras que para la velocidad de ejecución de la tarea (VE) se usó un acelerómetro durante la ejecución de tareas según dificultad (fácil, moderado y difícil) en cuatro etapas aleatorizadas de intervención (control, pre-exposición, exposición con retroalimentación auditiva y post-exposición).  Resultados. Se encontraron diferencias significativas (p&lt;0.001) entre las etapas pre-exposición y exposición, y entre pre-exposición y postexposición. Se identificó un aumento significativo de la VE entre pre-exposición y exposición para tareas con clasificación fácil y difícil.  Conclusión. El uso de un sistema de retroalimentación auditiva en adultos jóvenes sin patologías podría favorecer el aprendizaje y el control del movimiento glenohumeral sin disminuir la VE, resultado que se mantiene luego de la retroalimentación, por lo que el uso de un sistema de retroalimentación auditiva en individuos sanos podría resultar en una estrategia útil para el entrenamiento del control motriz del hombro.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Motor Activity]]></kwd>
<kwd lng="en"><![CDATA[Feedback, Sensory]]></kwd>
<kwd lng="en"><![CDATA[Psychomotor Performance (MeSH)]]></kwd>
<kwd lng="es"><![CDATA[Actividad motora]]></kwd>
<kwd lng="es"><![CDATA[Retroalimentación sensorial]]></kwd>
<kwd lng="es"><![CDATA[Desempeño psicomotor (DeCS)]]></kwd>
</kwd-group>
</article-meta>
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