Trastornos del sueño no respiratorios en relación con ictus / Non-breathing-related sleep disorders following stroke

Introducción: Actualmente se reconoce que los trastornos respiratorios, en especial la apnea del sueño, son frecuentes en pacientes con accidente vascular cerebral y que su presencia reduce el potencial de recuperación neurológica de estos pacientes. Sin embargo, es poco conocido el hecho de que otros trastornos del sueño que también se producen a consecuencia de un ictus como la somnolencia diurna, el insomnio y los trastornos del movimiento también son capaces de producir o incrementar la discapacidad asociada al ictus. Desarrollo: Estudios polisomnográficos han evidenciado múltiples alteraciones en la arquitectura del sueño de los pacientes en la fase aguda del ictus, las cuales tienden a mejorar con el transcurso del tiempo pero manteniendo un efecto deletéreo sobre la calidad de vida. Lo mismo ocurre con trastornos del sueño que se producen como consecuencia de un ictus (el insomnio, la narcolepsia, el síndrome de piernas inquietas, los movimientos periódicos de las piernas y el trastorno de conducta del sueño MOR) todos los cuales son potencialmente tratables. Con el objetivo de incrementar la conciencia acerca de estas condiciones y sus efectos sobre los pacientes con ictus, se revisa brevemente la epidemiología y fisiopatología en la subpoblación de pacientes neurológicos con ictus. Conclusiones: A diferencia de los trastornos respiratorios, otros trastornos del sueño han sido escasamente estudiados en pacientes con ictus, a pesar de que prácticamente todos los trastornos del sueño pueden presentarse a consecuencia de esta enfermedad

Introduction: It has been shown that sleep-related breathing disorders, especially sleep apnea, are very common in patients who have had a stroke, and that they also reduce the potential for neurological recovery. Nevertheless, other sleep disorders caused by stroke (excessive daytime sleepiness, insomnia, sleep related movement disorders) can also cause or increase stroke-related disability, and this fact is less commonly known. Development: Studies with polysomnography have shown many abnormalities in sleep architecture during the acute phase of stroke; these abnormalities have a negative impact on the patient's quality of life although they tend to improve with time. This also happens with other sleep disorders occurring as the result of a stroke (insomnia, narcolepsy, restless legs syndrome, periodic limb movement disorder and REM sleep behavior disorder), which are nevertheless potentially treatable. In this article, we briefly review the physiopathology and epidemiology of the disorders listed above in order to raise awareness about the importance of these disorders and the effects they elicit in stroke patients. Conclusions: Sleep disorders that are not breathing-related have scarcely been studied in stroke patients despite the fact that almost all such disorders may present as a result of a cerebrovascular event

Non-breathing-related sleep disorders following stroke.

INTRODUCTION: It has been shown that sleep-related breathing disorders, especially sleep apnea, are very common in patients who have had a stroke, and that they also reduce the potential for neurological recovery. Nevertheless, other sleep disorders caused by stroke (excessive daytime sleepiness, insomnia, sleep related movement disorders) can also cause or increase stroke-related disability, and this fact is less commonly known. DEVELOPMENT: Studies with polysomnography have shown many abnormalities in sleep architecture during the acute phase of stroke; these abnormalities have a negative impact on the patient's quality of life although they tend to improve with time. This also happens with other sleep disorders occurring as the result of a stroke (insomnia, narcolepsy, restless legs syndrome, periodic limb movement disorder and REM sleep behavior disorder), which are nevertheless potentially treatable. In this article, we briefly review the physiopathology and epidemiology of the disorders listed above in order to raise awareness about the importance of these disorders and the effects they elicit in stroke patients. CONCLUSIONS: Sleep disorders that are not breathing-related have scarcely been studied in stroke patients despite the fact that almost all such disorders may present as a result of a cerebrovascular event.

The role of the temporal lobe amygdala in ponto-geniculo-occipital activity and sleep organization in cats.

Ponto-geniculo-occipital (PGO) spikes propagate to different structures of the limbic system, including the temporal lobe amygdala. There is direct connection between the amygdala and the pontine nuclei involved in the generation of PGO spikes. It has also been shown that both the amount and the pattern of PGO spike discharges are under the influence of several brainstem and forebrain structures. In the present work, PGO activity was analyzed in unrestrained cats submitted to low-intensity amygdaloid electrical stimulation during paradoxical sleep (PS) episodes. General sleep organization as well as number, mean duration and percentage of PS episodes, were assessed in 8-h sleep recordings during amygdaloid stimulation. Amygdaloid stimulation significantly increased PGO number, spike density and, specially, PGO burst density. No significant changes were found in PS episodes or in the slow-wave sleep. It is concluded that the amygdala plays a role in the modulation of PGO activity by means of a facilitatory influence. It is proposed that this influence is probably exerted through a positive feedback mechanism. The independence between PGO generation and PS maintenance mechanisms is emphasized.