RESUMEN
Time-of-night patterns for periodic leg movement in sleep (PLMS) activity were assessed in 72 patients diagnosed as having PLMS (46 with only PLMS, 10 with narcolepsy and PLMS and 16 with sleep apnea and PLMS). Two distinct patterns of PLMS activity were identified. For one pattern, PLMS activity was high initially upon falling asleep and then decreased across the remainder of the night with the majority of the activity occurring during the first half of the night. For the second pattern, PLMS activity was relatively evenly distributed across the night with slightly greater activity in the middle of the night. These patterns were highly reliable across two nights of recording for group 1 and less so for group 2 even though there was significant variability between nights in the number of PLMS. Patients in group 2 were younger (except for those with sleep apnea) and were sleepier during the day. Implications of these findings for pharmacologic management are discussed.
Asunto(s)
Movimiento/fisiología , Sueño/fisiología , Adulto , Análisis de Varianza , Femenino , Humanos , Pierna/fisiología , Masculino , Persona de Mediana Edad , Periodicidad , Estudios Retrospectivos , Factores de TiempoRESUMEN
The effects of prolonged practice on the duration of the spiral aftereffect were investigated; 3,000 trials over 30 days with 5 levels of ambient illumination were randomly presented to a single subject. Scores gradually decreased until a plateau was reached during the last 13 days. A large decrement during the last 5 days was attributed to a decision process component. An early difference in performance at different illumination levels was largely eliminated by the last 5 days.
Asunto(s)
Efecto Tardío Figurativo , Ilusiones , Percepción de Movimiento , Ilusiones Ópticas , Práctica Psicológica , Toma de Decisiones , Femenino , Humanos , Iluminación , Rotación , Factores de TiempoRESUMEN
Heart rate was measured in 30 men during a recognition-memory task using both numbers and random shapes as stimuli. Findings for the number, but not the shape material, provided support for the hypothesis that availability of cognitive processing capacity is reflected by heart rate. This was considered an indication of separate cognitive processors.