Browsing by Author "Rivera-García, Ana Paula"

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    EEG coherence and power spectra during REM sleep related to melatonin intake in mild-to-moderate Alzheimer's disease: a pilot study
    (Informa Healthcare, 2023) Cruz-Aguilar, Manuel Alejandro; Ramírez-Salado, Ignacio; Hernández-González, Marisela; Guevara, Miguel Angel; Rivera-García, Ana Paula; Laboratorio de Cronobiología y Sueño, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz," Ciudad de México, CDMX, México; macrag@gmail.com (Manuel Alejandro Cruz-Aguilar)
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    Facial muscle activation during sleep and its relation to the rapid eye movements of REM sleep
    (WILEY-BLACKWELL PUBLISHING, INC, COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA, 2011) Rivera-García, Ana Paula; Ramírez-Salado, Ignacio; Corsi-Cabrera, María; Calvo, José María; Inst Nacl Psiquiatria Ramon Fuente Muniz, Lab Sueno, Direcc Invest Neurociencias, Calz Mexico Xochimilco 101,Col Sn Lorenzo Huipulc, Mexico City 14370, DF, Mexico.; aprivera@imp.edu.mx
    Facial muscle contractions (FMC) are a commonly observed feature during sleep stages in human subjects. Previous studies have associated FMC to emotional expression during waking. Phasic features of rapid eye movement (REM) sleep, such as REMs have also been linked to an increase in limbic structure activity with a subsequent relation to emotional dream content. We hypothesized that FMC would be more frequent during REM sleep, and that FMC would correlate with the characteristic REMs of this sleep stage. The present study was designed to evaluate the density per minute of the phasic and sustained FMC of five facial muscles (frontalis, corrugator, orbicularis oculi, zygomatic major left and right) during all sleep stages, and to explore their relation with REMs density in six healthy participants during an 8 h sleep recording. Results showed a significant increase in FMC of all recorded muscles during REM sleep, both in frequency and duration. Additionally, as expected, during REM sleep there was a positive correlation among the facial muscles and between these and REMs. Nevertheless, although associated in number, both features (FMC and REMs) were never simultaneous. Our results suggest that limbic activation during REM sleep may be responsible for the enhancement of facial muscle activity, which may be consistent with the theoretical perspective of a higher emotional activity during REM sleep.
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    Filogenia del sueño
    (2009) Ramírez-Salado, Ignacio; Rivera-García, Ana Paula; Departamento de Cronobiología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, C.P. 14370, México, D.F.
    El estudio comparativo de los mecanismos fisiológicos del sueño es un campo reciente en la neurobiología. Aún es difícil afirmar si el sueño es una función biológica característica de todos los vertebrados o si sólo confinado a algunas clases representativas de aves y mamíferos. El sueño, como conducta, es un fenómeno universal. Sin embargo, los estudios electroencefalográficos realizados en organismos que carecen de una corteza desarrollada (e.g. tortugas, lagartos y peces) no han brindado información concluyente sobre los patrones polisomnográficos típicos de sueño. Los estudios evolutivos muestran que los animales de sangre fría no presentan ciclos de sueño y vigilia, sino simplemente transiciones cíclicas entre reposo y actividad determinadas por factores ambientales. El propósito del presente trabajo es dar a conocer las diferentes proporciones, características y patrones del fenómeno del sueño en diferentes especies.
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    GABAA receptor agonist at the caudo-lateral peribrachial area suppresses ponto-geniculo-occipital waves and its related states
    (Tarrytown, NY : Elsevier, 2014) Ramírez-Salado, Ignacio; Rivera-García, Ana Paula; Velázquez Moctezuma, Javier; Jiménez Anguiano, Anabel; Pellicer, Francisco; Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, 09340, Mexico; Laboratorio de Cronobiología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, Tlalpan, 14370, Mexico; salado@imp.edu.mx