<?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>0185-3325</journal-id>
<journal-title><![CDATA[Salud mental]]></journal-title>
<abbrev-journal-title><![CDATA[Salud Ment]]></abbrev-journal-title>
<issn>0185-3325</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-33252021000600307</article-id>
<article-id pub-id-type="doi">10.17711/sm.0185-3325.2021.039</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Evaluation of the first-night effect of polysomnographic recording on cardiac autonomic activity in children with autism spectrum disorder]]></article-title>
<article-title xml:lang="es"><![CDATA[Evaluación del efecto de la primera noche de registro polisomnográfico sobre la actividad autonómicacardiaca de niños con trastorno del espectro autista]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mateos Salgado]]></surname>
<given-names><![CDATA[Erik Leonardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ayala Guerrero]]></surname>
<given-names><![CDATA[Fructuoso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rueda Santos]]></surname>
<given-names><![CDATA[Alexis de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olmo Alcántara]]></surname>
<given-names><![CDATA[Beatriz Eugenia del]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Psicología Laboratorio de Neurociencias]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Zacatecas Unidad Académica de Psicología ]]></institution>
<addr-line><![CDATA[Zacatecas ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<numero>6</numero>
<fpage>307</fpage>
<lpage>314</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33252021000600307&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33252021000600307&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33252021000600307&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction The first night effect (FNE) is the tendency to have lower than usual sleep quality and quantity during the first polysomnography (PSG) recording, which alters sleep architecture. The FNE occurs in autism spectrum disorder (ASD), with studies suggesting that cardiac autonomic dysregulation is altered in patients with this illness.  Objective To determine whether the FNE influences the autonomic activity of ASD and typically developing (TD) children.  Method Two PSGs were recorded in 13 ASD and 13 TD children. The FNE was evaluated with eight sleep variables and autonomic activity through respiratory sinus arrhythmia (RSA) and low frequency (LF). Statistical analyses included intra- and inter-subject comparisons.  Results The FNE was present in both groups and affected more sleep variables in the ASD group. There were no significant differences between both recordings in RSA and LF. Inter-subject comparison showed significant differences in certain sleep variables, mainly during the first night. A comparison of RSA and LF between N2 and N3 stages and REM sleep showed that the TD group had significant differences in both measures whereas the ASD group only did so in the LF the first night.  Discussion and conclusion The influence of the FNE on the quantitative characteristics of sleep is corroborated in ASD and TD children, but not in RSA or LF. When the activity of the RSA and LF between sleep stages was considered, a different pattern was observed between the two PSG recordings.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción El efecto de la primera noche (EPN) es la tendencia a tener una calidad y cantidad de sueño inferior a la usual durante un primer registro de polisomnografía (PSG). El EPN se presenta en el trastorno del espectro autista (TEA) y en estos pacientes se ha propuesto que la modulación autonómica cardiaca presenta alteraciones.  Objetivo Evaluar si el EPN influye en la actividad autonómica de participantes con TEA y con desarrollo típico (DT).  Método Se realizaron dos PSGs a 13 participantes con TEA y con DT. El EPN se evaluó con ocho variables del sueño y la actividad autonómica mediante la arritmia sinusal respiratoria (ASR) y la frecuencia-baja (LF). Los análisis estadísticos incluyeron comparaciones intra-sujeto e inter-sujeto.  Resultados El EPN se presentó en ambos grupos y afecto más al grupo con TEA. No hubo diferencias significativas entre ambos registros en ASR y LF. De la comparación inter-sujeto hubo diferencias significativas en algunas variables del sueño, principalmente de la primera noche. Al comparar ASR y LF entre las fases N2, N3 y el sueño MOR, el grupo de DT tuvo diferencias significativas en ambas medidas, el grupo TEA solamente en LF de la primera noche.  Discusión y conclusión Se corrobora la presencia del EPN sobre las características cuantitativas del sueño en los grupos con TEA y con DT, pero no en ASR y LF. Cuando se considera la actividad de la ASR y LF entre fases de sueño se observa un patrón diferente entre los dos registros.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Sleep]]></kwd>
<kwd lng="en"><![CDATA[autism]]></kwd>
<kwd lng="en"><![CDATA[parasympathetic nervous system]]></kwd>
<kwd lng="en"><![CDATA[heart rate variability]]></kwd>
<kwd lng="es"><![CDATA[Sueño]]></kwd>
<kwd lng="es"><![CDATA[autismo]]></kwd>
<kwd lng="es"><![CDATA[sistema nervioso parasimpático]]></kwd>
<kwd lng="es"><![CDATA[variabilidad de la frecuencia cardiaca]]></kwd>
</kwd-group>
</article-meta>
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