Posttraining Sleep Enhances Automaticity in Perceptual Discrimination
Open accessAbstract
Perceptual learning can develop over extended periods, with slow, at times sleep-dependent, improvement seen several days after training. As a result, performance can become more automatic, that is, less dependent on voluntary attention. This study investigates whether the brain correlates of this enhancement of automaticity are sleep-dependent. Event-related potentials produced in response to complex auditory stimuli were recorded while subjects' attention was focused elsewhere. We report here that following training on an auditory discrimination task, performance continued to improve, without significant further training, for 72 hr. At the same time, several event-related potential components became evident 48–72 hr after training. Posttraining sleep deprivation prevented neither the continued performance improvement nor the slow development of cortical dynamics related to an enhanced familiarity with the task. However, those brain responses associated with the automatic shift of attention to unexpected stimuli failed to develop. Thus, in this auditory learning paradigm, posttraining sleep appears to reduce the voluntary attentional effort required for successful perceptual discrimination by facilitating the intrusion of a potentially meaningful stimulus into one's focus of attention for further evaluation.
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Sleep after training of perceptual and motor skills like visual texture discrimination and finger sequence tapping can produce significant improvement (gain in skill at later retesting).
“With regard to procedural memory, findings that sleep after training of perceptual and motor skills like visual texture discrimination and finger sequence tapping can produce significant improvement (i.e., a gain in skill at a later retesting) have pointed towards an active reprocessing of skill representations occurring during sleep that sharpens the respective representations (47,57,147,274,275,”
From About Sleep's Role in Memory (2013) · cites this paper as [47]
Cites
(1966) · Medical Entomology and Zoology · Cited by 10,293 · see citing works
Amabile, T. M., Barsade, S. G., Mueller, J. S., & Staw, B. M. (2005) · Administrative Science Quarterly · doi:10.2189/asqu.2005.50.3.367 · Cited by 2,208 · see citing works
Risto, N. (2018) · Routledge eBooks · doi:10.4324/9780429487354 · Cited by 2,047 · see citing works
The P300 wave of the human event-related potential
Picton, T. W. (1992) · Journal of Clinical Neurophysiology · doi:10.1097/00004691-199210000-00002 · Cited by 1,908 · see citing works
Sleep-dependent memory consolidation
Stickgold, R. (2005) · Nature · doi:10.1038/nature04286 · Cited by 1,857 · see citing works
Self-citationNäätänen, R. (1990) · Behavioral and Brain Sciences · doi:10.1017/s0140525x00078407 · Cited by 1,678 · see citing works
Practice with Sleep Makes Perfect
Walker, M. P., Brakefield, T., Morgan, A., Hobson, J. A., & Stickgold, R. (2002) · Neuron · doi:10.1016/s0896-6273(02)00746-8 · Cited by 1,307 · see citing works
Self-citationRecanzone, G., Schreiner, C., & Merzenich, M. (1993) · The Journal of Neuroscience · doi:10.1523/jneurosci.13-01-00087.1993 · Cited by 1,266 · see citing works
The role of sleep in learning and memory
Maquet, P. (2001) · Science · doi:10.1126/science.1062856 · Cited by 1,177 · see citing works
Sleep-Dependent Learning and Memory Consolidation
Walker, M. P., & Stickgold, R. (2004) · Neuron · doi:10.1016/j.neuron.2004.08.031 · Cited by 1,113 · see citing works
Self-citationWalker, M. P., & Stickgold, R. (2006) · Annual Review of Psychology · doi:10.1146/annurev.psych.56.091103.070307 · Cited by 1,075 · see citing works
Self-citationThe concept of auditory stimulus representation in cognitive neuroscience.
Näätänen, R., & Winkler, I. (1999) · Psychological Bulletin · doi:10.1037/0033-2909.125.6.826 · Cited by 1,069 · see citing works
Dissociable stages of human memory consolidation and reconsolidation
Walker, M. P., Brakefield, T., Allan Hobson, J., & Stickgold, R. (2003) · Nature · doi:10.1038/nature01930 · Cited by 1,025 · see citing works
Self-citationNeural Correlates of Motor Memory Consolidation
Shadmehr, R., & Holcomb, H. H. (1997) · Science · doi:10.1126/science.277.5327.821 · Cited by 1,022 · see citing works
Reshaping the Cortical Motor Map by Unmasking Latent Intracortical Connections
Jacobs, K. M., & Donoghue, J. P. (1991) · Science · doi:10.1126/science.2000496 · Cited by 1,014 · see citing works
Dependence on REM Sleep of Overnight Improvement of a Perceptual Skill
Karni, A., Tanne, D., Rubenstein, B. S., Askenasy, J. J. M., & Sagi, D. (1994) · Science · doi:10.1126/science.8036518 · Cited by 1,002 · see citing works
Neural Mechanisms of Involuntary Attention to Acoustic Novelty and Change
Escera, C., Alho, K., Winkler, I., & Näätänen, R. (1998) · Journal of Cognitive Neuroscience · doi:10.1162/089892998562997 · Cited by 916 · see citing works
‘Primitive intelligence’ in the auditory cortex
Näätänen, R., Tervaniemi, M. H., Sussman, E. S., Paavilainen, P., & Winkler, I. (2001) · Trends in Neurosciences · doi:10.1016/s0166-2236(00)01790-2 · Cited by 832 · see citing works
Auditory frequency discrimination and event-related potentials
Sams, M. E., Paavilainen, P., Alho, K., & Näätänen, R. (1985) · Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section · doi:10.1016/0168-5597(85)90054-1 · Cited by 799 · see citing works
Recanzone, G. H., Merzenich, M. M., Jenkins, W. M., Grajski, K. A., & Dinse, H. R. (1992) · Journal of Neurophysiology · doi:10.1152/jn.1992.67.5.1031 · Cited by 778 · see citing works
Sleep, learning, and dreams: off-line memory reprocessing
Stickgold, R., Hobson, J. A., Fosse, R., & Fosse, M. (2001) · Science · doi:10.1126/science.1063530 · Cited by 762 · see citing works
Self-citationExperience-dependent changes in cerebral activation during human REM sleep
Maquet, P., Laureys, S., Peigneux, P., Fuchs, S., Petiau, C., Phillips, C., Aerts, J., Del Fiore, G., Degueldre, C., Meulemans, T., et al. (2000) · Nature Neuroscience · doi:10.1038/77744 · Cited by 747 · see citing works
Visual discrimination learning requires sleep after training
Stickgold, R., James, L., & Hobson, J. A. (2000) · Nature Neuroscience · doi:10.1038/81756 · Cited by 715 · see citing works
Self-citationA Source Analysis of the Late Human Auditory Evoked Potentials
Scherg, M., Vajsar, J., & Picton, T. W. (1989) · Journal of Cognitive Neuroscience · doi:10.1162/jocn.1989.1.4.336 · Cited by 704 · see citing works
Aging and inhibition: Beyond a unitary view of inhibitory processing in attention.
Kramer, A. F., Humphrey, D. G., Larish, J. F., & Logan, G. D. (1994) · Psychology and Aging · doi:10.1037/0882-7974.9.4.491 · Cited by 699 · see citing works
Involuntary Attention and Distractibility as Evaluated with Event-Related Brain Potentials
Escera, C., Alho, K., Schröger, E., & Winkler, I. (2000) · Audiology and Neurotology · doi:10.1159/000013877 · Cited by 690 · see citing works
The Neural Basis of Perceptual Learning
Gilbert, C. D., Sigman, M., & Crist, R. E. (2001) · Neuron · doi:10.1016/s0896-6273(01)00424-x · Cited by 688 · see citing works
Plasticity of the sensorimotor cortex representation of the reading finger in Braille readers
Pascual‐Leone, Á., & Torres, F. (1993) · Brain · doi:10.1093/brain/116.1.39 · Cited by 654 · see citing works
Attentive novelty detection in humans is governed by pre-attentive sensory memory
Tiitinen, H., May, P., Reinikainen, K., & Näätänen, R. (1994) · Nature · doi:10.1038/372090a0 · Cited by 637 · see citing works
Sleep forms memory for finger skills
Fischer, S., Hallschmid, M., Elsner, A. L., & Born, J. (2002) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.182178199 · Cited by 589 · see citing works
Visual Discrimination Task Improvement: A Multi-Step Process Occurring During Sleep
Stickgold, R., Whidbee, D., Schirmer, B., Patel, V., & Hobson, J. A. (2000) · Journal of Cognitive Neuroscience · doi:10.1162/089892900562075 · Cited by 560 · see citing works
Self-citationEarly sleep triggers memory for early visual discrimination skills
Gais, S., Plihal, W., Wagner, U., & Born, J. (2000) · Nature Neuroscience · doi:10.1038/81881 · Cited by 558 · see citing works
Baudena, P., Halgren, E., Heit, G., & Clarke, J. M. (1995) · Electroencephalography and Clinical Neurophysiology · doi:10.1016/0013-4694(95)98476-o · Cited by 530 · see citing works
Halgren, E., Baudena, P., Clarke, J. M., Heit, G., Liégeois‐Chauvel, C., Chauvel, P., & Musolino, A. (1995) · Electroencephalography and Clinical Neurophysiology · doi:10.1016/0013-4694(94)00259-n · Cited by 513 · see citing works
Opitz, B., Rinne, T., Mecklinger, A., von Cramon, D. Y., & Schröger, E. (2002) · NeuroImage · doi:10.1006/nimg.2001.0970 · Cited by 513 · see citing works
Auditory Neurophysiologic Responses and Discrimination Deficits in Children with Learning Problems
Kraus, N., McGee, T., Carrell, T. D., Zecker, S. G., Nicol, T. G., & Koch, D. B. (1996) · Science · doi:10.1126/science.273.5277.971 · Cited by 507 · see citing works
Consolidation during sleep of perceptual learning of spoken language
Fenn, K. M., Nusbaum, H. C., & Margoliash, D. (2003) · Nature · doi:10.1038/nature01951 · Cited by 463 · see citing works
Central Auditory Plasticity: Changes in the N1-P2 Complex after Speech-Sound Training
Tremblay, K. L., Kraus, N., McGee, T., Ponton, C. W., & Otis, A. B. (2001) · Ear and Hearing · doi:10.1097/00003446-200104000-00001 · Cited by 444 · see citing works
Halgren, E., Baudena, P., Clarke, J. M., Heit, G., Marinkovic, K., Devaux, B., Vignal, J.-P., & Biraben, A. (1995) · Electroencephalography and Clinical Neurophysiology · doi:10.1016/0013-4694(95)98475-n · Cited by 432 · see citing works
Learning to see: experience and attention in primary visual cortex
Crist, R. E., Li, W., & Gilbert, C. D. (2001) · Nature Neuroscience · doi:10.1038/87470 · Cited by 364 · see citing works
The restorative effect of naps on perceptual deterioration
Mednick, S. C., Nakayama, K., Cantero, J. L., Atienza, M., Levin, A. A., Pathak, N., & Stickgold, R. (2002) · Nature Neuroscience · doi:10.1038/nn864 · Cited by 360 · see citing works
Self-citationSchröger, E., & Wolff, C. (1998) · Cognitive Brain Research · doi:10.1016/s0926-6410(98)00013-5 · Cited by 358 · see citing works
Development of a memory trace for a complex sound in the human brain
Näätänen, R., Schröger, E., Karakaş, S., Tervaniemi, M. H., & Paavilainen, P. (1993) · Neuroreport · doi:10.1097/00001756-199305000-00010 · Cited by 354 · see citing works
A distributed cortical network for auditory sensory memory in humans
Alain, C., Woods, D. L., & Knight, R. T. (1998) · Brain Research · doi:10.1016/s0006-8993(98)00851-8 · Cited by 335 · see citing works
The time course of auditory perceptual learning
Tremblay, K. L., Kraus, N., & McGee, T. (1998) · Neuroreport · doi:10.1097/00001756-199811160-00003 · Cited by 322 · see citing works
Central Auditory System Plasticity Associated with Speech Discrimination Training
Kraus, N., McGee, T., Carrell, T. D., King, C. D., Tremblay, K. L., & Nicol, T. G. (1995) · Journal of Cognitive Neuroscience · doi:10.1162/jocn.1995.7.1.25 · Cited by 319 · see citing works
Sleep-dependent motor memory plasticity in the human brain
Walker, M. P., Stickgold, R., Alsop, D., Gaab, N., & Schlaug, G. (2005) · Neuroscience · doi:10.1016/j.neuroscience.2005.04.007 · Cited by 308 · see citing works
Self-citationA Neural Mechanism for Involuntary Attention Shifts to Changes in Auditory Stimulation
Schröger, E. (1996) · Journal of Cognitive Neuroscience · doi:10.1162/jocn.1996.8.6.527 · Cited by 287 · see citing works
Perceptual learning: specificity versus generalization
Fahle, M. W. (2005) · Current Opinion in Neurobiology · doi:10.1016/j.conb.2005.03.010 · Cited by 282 · see citing works
The relationships between memory systems and sleep stages
Rauchs, G., Desgranges, B., Foret, J., & Eustache, F. (2005) · Journal of Sleep Research · doi:10.1111/j.1365-2869.2005.00450.x · Cited by 279 · see citing works
Superior Formation of Cortical Memory Traces for Melodic Patterns in MusiciansPreprint
Tervaniemi, M. H., Rytkönen, M., Schröger, E., Ilmoniemi, R. J., & Näätänen, R. (2001) · Learning & Memory · doi:10.1101/lm.39501 · Cited by 269 · see citing works
Plastic changes in the auditory cortex induced by intensive frequency discrimination training
Menning, H., Roberts, L. E., & Pantev, C. (2000) · Neuroreport · doi:10.1097/00001756-200003200-00032 · Cited by 268 · see citing works
The Time Course of Neural Changes Underlying Auditory Perceptual LearningPreprint
Atienza, M., Cantero, J. L., & Dominguez-Marin, E. (2002) · Learning & Memory · doi:10.1101/lm.46502 · Cited by 248 · see citing works
Self-citationEscera, C., Yago, E., & Alho, K. (2001) · European Journal of Neuroscience · doi:10.1046/j.0953-816x.2001.01707.x · Cited by 234 · see citing works
Impaired motor memory for a pursuit rotor task following Stage 2 sleep loss in college students
SMITH, C., & MACNEILL, C. (1994) · Journal of Sleep Research · doi:10.1111/j.1365-2869.1994.tb00133.x · Cited by 210 · see citing works
Юрьевич, Ш. Ю., Kujala, T., Palva, S., Ilmoniemi, R. J., & Näätänen, R. (2000) · NeuroImage · doi:10.1006/nimg.2000.0646 · Cited by 190 · see citing works
Humphrey, D. R. (1968) · Electroencephalography and Clinical Neurophysiology · doi:10.1016/0013-4694(68)90152-1 · Cited by 181 · see citing works
Inhibition in Attention and Aging
McDowd, J. M. (1997) · The Journals of Gerontology Series B · doi:10.1093/geronb/52b.6.p265 · Cited by 178 · see citing works
Auditory information processing during human sleep as revealed by event-related brain potentials
Atienza, M., Cantero, J. L., & Escera, C. (2001) · Clinical Neurophysiology · doi:10.1016/s1388-2457(01)00650-2 · Cited by 146 · see citing works
Self-citationA quantitative measure for short-term cortical plasticity in human vision
Kapadia, M., Gilbert, C., & Westheimer, G. (1994) · Journal of Neuroscience · doi:10.1523/jneurosci.14-01-00451.1994 · Cited by 137 · see citing works
Atienza, M., & Cantero, J. L. (2001) · Brain Research · doi:10.1016/s0006-8993(01)02340-x · Cited by 120 · see citing works
Self-citationEffects of involuntary auditory attention on visual task performance and brain activity
Alho, K., Escera, C., Díaz, R., et al. (1997) · Neuroreport · doi:10.1097/00001756-199710200-00010 · Cited by 118 · see citing works
Human auditory-cortex mechanisms of preattentive sound discrimination
Kropotov, J. D., Alho, K., Näätänen, R., Ponomarev, V. A., Kropotova, O. V., Аничков, А. Д., & Nechaev, V. B. (2000) · Neuroscience Letters · doi:10.1016/s0304-3940(00)00765-5 · Cited by 117 · see citing works
Neural systems underlying learning and representation of global motion
Vaina, L. M., Belliveau, J. W., Roziers, E. B. D., & Zeffiro, T. A. (1998) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.95.21.12657 · Cited by 113 · see citing works
Walker, M. P., & Stickgold, R. (2005) · Clinics in Sports Medicine · doi:10.1016/j.csm.2004.11.002 · Cited by 112 · see citing works
Self-citationCerebral mechanisms underlying orienting of attention towards auditory frequency changes
Yago, E., Escera, C., Alho, K., & Giard, M. (2001) · Neuroreport · doi:10.1097/00001756-200108080-00058 · Cited by 111 · see citing works
The mismatch negativity to frequency deviant stimuli during natural sleep
Loewy, D. H., Campbell, K. B., & Bastien, C. (1996) · Electroencephalography and Clinical Neurophysiology · doi:10.1016/0013-4694(96)95553-4 · Cited by 98 · see citing works
Sleep and rest facilitate auditory learning
Gottselig, J. M., Hofer-Tinguely, G., Borbély, A. A., Regel, S. J., Landolt, H., Rétey, J., & Achermann, P. (2004) · Neuroscience · doi:10.1016/j.neuroscience.2004.05.053 · Cited by 97 · see citing works
Atienza, M., Cantero, J. L., & Dominguez-Marin, E. (2002) · International Journal of Psychophysiology · doi:10.1016/s0167-8760(02)00113-7 · Cited by 96 · see citing works
Self-citationThe mismatch negativity component reveals the sensory memory during REM sleep in humans
Atienza, M., Cantero, J. L., & Gómez, C. M. (1997) · Neuroscience Letters · doi:10.1016/s0304-3940(97)00798-2 · Cited by 86 · see citing works
Self-citationFamiliarity Affects the Processing of Task-irrelevant Auditory Deviance
Jacobsen, T., Schröger, E., Winkler, I., & Horváth, J. (2005) · Journal of Cognitive Neuroscience · doi:10.1162/089892905774589262 · Cited by 83 · see citing works
Automatic Auditory Information Processing in Sleep
Nashida, T., Yabe, H., Sato, Y., Hiruma, T., Sutoh, T., Shinozaki, N., & Kaneko, S. (2000) · SLEEP · doi:10.1093/sleep/23.6.1i · Cited by 82 · see citing works
An event-related potential evaluation of involuntary attentional shifts in young and older adults.
Gaeta, H., Friedman, D., Ritter, W., & Cheng, J. C. (2001) · Psychology and Aging · doi:10.1037/0882-7974.16.1.55 · Cited by 73 · see citing works
Wan, H., Warburton, E. C., Kuśmierek, P., Aggleton, J. P., Kowalska, D. M., & Brown, M. W. (2001) · European Journal of Neuroscience · doi:10.1046/j.0953-816x.2001.01625.x · Cited by 72 · see citing works
Acoustic features and acoustic change are represented by different central pathways
King, C. D., McGee, T., Rubel, E. W., et al. (1995) · Hearing Research · doi:10.1016/0378-5955(95)00028-3 · Cited by 60 · see citing works
Decay time of the auditory sensory memory trace during wakefulness and REM sleep.
Atienza, M., Cantero, J. L., & Gómez, C. M. (2000) · Psychophysiology · doi:10.1111/1469-8986.3740485 · Cited by 54 · see citing works
Memory and consciousness: A selective review of issues and data
Rugg, M. D. (1995) · Neuropsychologia · doi:10.1016/0028-3932(95)00053-6 · Cited by 40 · see citing works
Song, Y., Ding, Y., Fan, S., & Chen, L. (2002) · Neuroreport · doi:10.1097/00001756-200211150-00013 · Cited by 23 · see citing works
Learning: Neuronal dynamics and perceptual learning
Gilbert, C. D. (1994) · Current Biology · doi:10.1016/s0960-9822(00)00138-x · Cited by 22 · see citing works
Vocal perception: Brain event‐related potentials in a chimpanzee
Berntson, G. G., Boysen, S. T., & Torello, M. W. (1993) · Developmental Psychobiology · doi:10.1002/dev.420260602 · Cited by 17 · see citing works
Karni, A., Weisberg, J., Lalonde, F. M., & Ungerleider, L. G. (1996) · NeuroImage · doi:10.1016/s1053-8119(96)80545-3 · Cited by 12 · see citing works
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- Authors
- Atienza, M., Cantero, J. L., & Stickgold, R.
- Affiliations
- Universidad Pablo de Olavide (ES)
- University Pablo de Olavide, Spain
- Harvard University (US)
- Venue
- Journal of Cognitive Neuroscience
- Publisher
- MIT Press - Journals
- Published
- 2004-01
- Volume
- 16
- Issue
- 1
- Pages
- 53-64
- ISSN
- 0898-929X (ISSN-L)
- 1530-8898
- OpenAlex
- W2144302036
- Cited by
- 151
- References
- 81
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 5 · 2021: 2 · 2020: 3 · 2019: 19 · 2018: 4 · 2017: 6 · 2016: 4 · 2015: 4 · 2014: 9 · 2013: 16 · 2012: 7
- FWCI
- 6.37
- Type
- journal article
- Language
- en
- Open access
- green
- nrs.harvard.edu
- Licence
- cc-by
- Locations
- Journal of Cognitive Neuroscience (publishedVersion)
- PubMed (publishedVersion)
- Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neuroscience and Music Perception
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Keywords
- perceptual learning, automaticity, auditory discrimination, sleep deprivation, event-related potentials, attentional effort, attentional shift, voluntary attention
- MeSH terms
- Adult, Analysis of Variance, Attention, Auditory Cortex, Auditory Perception, Discrimination Learning, Evoked Potentials, Auditory, Female, Field Dependence-Independence, Humans, Memory, Practice, Psychological, Sleep, Sleep Deprivation
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