Daytime naps improve procedural motor memory
ABSTRACT To investigate the impact of a short daytime nap on procedural and declarative memory consolidation.
Following a normal night's sleep, 34 young healthy subjects were randomly assigned to a nap or wake condition of about 45min in the early afternoon after learning procedural and declarative memory tasks. Subjects were controlled for alertness and cortisol secretion.
The afternoon naps were dominated by sleep stage 2 but contained some slow wave sleep (SWS) and rapid eye movement (REM) sleep as well. Naps significantly improved procedural, but not declarative, memory. Females showed more improvement than males in the declarative memory tasks irrespective of nap or wake. There was no difference between groups with respect to cortisol secretion or alertness.
A short nap is favorable for consolidation of procedural memory. The possibly confounding effect of gender should always be considered in research on sleep and memory.
- SourceAvailable from: Mohd Amzari Tumiran
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- "In adolescence especially, midday napping is helpful in reinforcing declarative memory (Tucker et al. 2006). However, the study by Backhaus and Junghanns (2006) found that procedural memory, but not declarative memory, of 34 young healthy subjects aged 18-25 years old can be reinforced significantly through napping (Backhaus and Junghanns 2006). Napping also seemed to be more beneficial throughout early life in consolidating procedural memory (Schabus et al. 2004; Rasch et al. 2007; Wilhelm et al. 2008; Backhaus et al. 2008; Prehn-Kristensen et al. 2009). "
ABSTRACT: Napping/siesta during the day is a phenomenon, which is widely practised in the world. However, the timing, frequency, and duration may vary. The basis of napping is also diverse, but it is mainly done for improvement in alertness and general well-being. Neuroscience reveals that midday napping improves memory, enhances alertness, boosts wakefulness and performance, and recovers certain qualities of lost night sleep. Interestingly, Islam, the religion of the Muslims, advocates midday napping primarily because it was a practice preferred by Prophet Muhammad (pbuh). The objectives of this review were to investigate and compare identical key points on focused topic from both neuroscientific and Islamic perspectives and make recommendations for future researches.Journal of Religion and Health 08/2015; DOI:10.1007/s10943-015-0093-7 · 1.02 Impact Factor
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- "However, we feel that the impact of these factors on the results are limited and are not driving the results of this study because there was no difference between the sleep and no-sleep groups on the Stanford Sleepiness Scale at either the practice session or retention session, regardless of the time of day when the session occurred. Other studies have attempted to control for these factors by including a nap to determine the contribution of sleep to off-line learning (so the practice session and retention session occur at the same time of day regardless of whether participants are in the sleep condition or no-sleep condition), and found that a daytime nap enhances learning of a mirror-tracing task52 and a finger-tapping task.49,53 Cohen et al1 used two diurnal control groups, so that practice and retention testing took place at the same time of day (both at 8 am or both at 8 pm) and found that improvements in their task outcome measures were not associated with the time of day of testing. "
ABSTRACT: There is increasing evidence that sleep promotes off-line enhancement of a variety of explicitly learned motor tasks in young adults. However, whether sleep promotes off-line consolidation of implicitly learned motor tasks is still under question. Furthermore, the role of sleep in promoting transfer of learning remains unknown. This study examined the role of sleep in learning and transfer of learning of an implicit continuous motor task. Twenty-three neurologically intact individuals (mean age 26.4 years) were randomly assigned to either a sleep group or a no-sleep group. The sleep group practiced a continuous tracking task in the evening and underwent retention and transfer testing the following morning, while the no-sleep group practiced the tracking task in the morning and underwent retention and transfer testing in the evening. The results show that in both the sleep and no-sleep groups, performance improved off-line without further practice for both the general skill and the sequence-specific skill. The results also indicate that sleep and time promote transfer of learning of both sequence-specific and general skill learning to a spatial and temporal variation of the motor task. These findings demonstrate that sleep does not play a critical role in promoting off-line learning and transfer of learning of an implicit continuous motor task.Nature and Science of Sleep 03/2014; 6:27-36. DOI:10.2147/NSS.S53789
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- "In line with this reasoning, other procedural tasks previously studied in children and having found time-more than sleep-dependent effects actually mostly benefit from REM and/or light non-REM (stage 2) sleep in adults. For instance, post-training sleep spindle density was associated with the consolidation of motor and visuomotor learning (Fogel et al., 2007; Peters et al., 2008; Smith and MacNeill, 1994) whereas REM nocturnal sleep (Fogel et al., 2007) and diurnal stage 2 sleep were related to the development of mirror tracing abilities (Backhaus and Junghanns, 2006). Also, it should be considered that adaptive visuo-motor consolidation processes might be qualitatively different between children and adults. "
ABSTRACT: Cognitive impairments are often associated with abnormal sleep activity in developmental disorders and pathologies of childhood. Beside, accumulated evidence indicates that post-training sleep benefits to the consolidation of recently learned information in healthy adults and children. Although sleep-dependent consolidation effects in children are clearly established for declarative memories, they remain more debated in the procedural memory domain. Nowadays, recent experimental data suggest close interactions between the development of sleep-dependent plasticity markers, cortical maturation and cognition in children. In the present review, we propose that studying sleep and memory consolidation processes in developmental disorders and acquired childhood pathologies can provide novel, enlightening clues to understand the pathophysiological mechanisms subtending the disruption of long-term cerebral plasticity processes eventually leading to cognitive and learning deficits in children.International journal of psychophysiology: official journal of the International Organization of Psychophysiology 06/2013; 89(2). DOI:10.1016/j.ijpsycho.2013.06.022 · 2.88 Impact Factor