REM sleep latency during nocturnal sleep in mentally retarded infants |
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| Authors: | M Shibagaki S Kiyono T Takeuchi |
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| Affiliation: | 1. Instituto de Neurociencias, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara. Francisco de Quevedo No. 180, Col. Arcos Vallarta, ZIP 44130, Guadalajara, Jalisco, Mexico;2. Facultad de Ciencias para el Desarrollo Humano, Universidad Autónoma de Tlaxcala. Carretera Federal Puebla-Tlaxcala km 1.5, Col. La Loma Xicoténcatl, ZIP 90070, Tlaxcala de Xicoténcatl, Tlaxcala, Mexico;3. Departamento de Biología de la Reproducción, Universidad Autónoma Metropolitana, Iztapalapa. San Rafael Atlixco No.186, Col.Vicentina, ZIP 09340, Iztapalapa, México city, Mexico |
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| Abstract: | ![]()
REM sleep latency observed in 61 mentally retarded infants (4-13 months of age) was studied throughout nocturnal sleep. Mentally retarded infants revealed a J distribution of short (less than 8 min) and long (more than 8 min) REM sleep latencies. This feature of distribution was similar to that obtained by other authors from normal infants under 3 months of age. REM sleep latency did not depend on the duration of prior wakefulness. Long REM sleep latencies were no more often preceded by long episodes of wakefulness than were short REM sleep latencies. No correlation was found between REM sleep latency and age, developmental quotient or daytime clinical EEG abnormalities. |
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