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Jones BJ, Chen ME, Simoncini L, Spencer RMC. Sleep enhances reconsolidation-based strengthening of visuospatial memories. Sci Rep 2022; 12:7307. [PMID: 35508568 PMCID: PMC9068753 DOI: 10.1038/s41598-022-11135-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 04/18/2022] [Indexed: 11/21/2022] Open
Abstract
Consolidated memories can be returned to a labile state upon reactivation. The re-stabilization of reactivated memories, or reconsolidation, can allow for change in previously established memories. Given the role of sleep in the initial consolidation of memories, sleep may be important for reconsolidation as well. However, effects of sleep on reconsolidation and specific aspects of sleep that may contribute are unclear. Here, participants learned 30 picture-location pairs. After overnight sleep, initial consolidation was tested. Following either one day (Experiment 1) or one week (Experiment 2), participants were tested again to reactivate their memory and then learned 30 novel picture-location pairs. Control groups (Experiment 1) received no reactivation prior to new learning. Twelve hours later, after daytime wakefulness or overnight sleep, participants completed a final memory test. Sleep participants underwent polysomnography between reactivation and final tests. In Experiment 1, reactivation led to preservation of memory compared to no reactivation. Sleep was associated with less post-reactivation memory decline than waking, with memory preservation positively related to time spent in non-rapid-eye movement sleep. In Experiment 2, sleep was associated with greater post-reactivation memory improvement than waking, with improvement positively related to sigma activity. These results suggest sleep enhances reconsolidation-based strengthening of episodic memories.
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Affiliation(s)
- Bethany J Jones
- Department of Psychological & Brain Sciences, University of Massachusetts, Amherst, MA, 01003, USA.,Neuroscience & Behavior Program, University of Massachusetts, Amherst, MA, 01003, USA
| | - Margaret E Chen
- Department of Psychological & Brain Sciences, University of Massachusetts, Amherst, MA, 01003, USA.,Commonwealth Honors College, University of Massachusetts, Amherst, MA, 01003, USA
| | - Lindsey Simoncini
- Department of Psychological & Brain Sciences, University of Massachusetts, Amherst, MA, 01003, USA.,Commonwealth Honors College, University of Massachusetts, Amherst, MA, 01003, USA
| | - Rebecca M C Spencer
- Department of Psychological & Brain Sciences, University of Massachusetts, Amherst, MA, 01003, USA. .,Neuroscience & Behavior Program, University of Massachusetts, Amherst, MA, 01003, USA. .,Institute for Applied Life Sciences, University of Massachusetts, 240 Thatcher Way, S315, Amherst, MA, 01003, USA.
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MacDonald KJ, Cote KA. Contributions of post-learning REM and NREM sleep to memory retrieval. Sleep Med Rev 2021; 59:101453. [PMID: 33588273 DOI: 10.1016/j.smrv.2021.101453] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 12/10/2020] [Accepted: 12/23/2020] [Indexed: 02/06/2023]
Abstract
It has become clear that sleep after learning has beneficial effects on the later retrieval of newly acquired memories. The neural mechanisms underlying these effects are becoming increasingly clear as well, particularly those of non-REM sleep. However, much is still unknown about the sleep and memory relationship: the sleep state or features of sleep physiology that associate with memory performance often vary by task or experimental design, and the nature of this variability is not entirely clear. This paper describes pertinent features of sleep physiology and provides a detailed review of the scientific literature indicating beneficial effects of post-learning sleep on memory retrieval. This paper additionally introduces a hypothesis which attributes these beneficial effects of post-learning sleep to separable processes of memory reinforcement and memory refinement whereby reinforcement supports one's ability to retrieve a given memory and refinement supports the precision of that memory retrieval in the context of competitive alternatives. It is observed that features of non-REM sleep are involved in a post-learning substantiation of memory representations that benefit memory performance; thus, memory reinforcement is primarily attributed to non-REM sleep. Memory refinement is primarily attributed to REM sleep given evidence of bidirectional synaptic plasticity in REM sleep and findings from studies of selective REM sleep deprivation.
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Laniepce A, Lahbairi N, Cabé N, Pitel AL, Rauchs G. Contribution of sleep disturbances to the heterogeneity of cognitive and brain alterations in alcohol use disorder. Sleep Med Rev 2021; 58:101435. [PMID: 33578081 DOI: 10.1016/j.smrv.2021.101435] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/22/2020] [Accepted: 10/27/2020] [Indexed: 12/28/2022]
Abstract
Cognitive and brain alterations are common in alcohol use disorder and vary importantly from one patient to another. Sleep disturbances are also very frequent in these patients and remain largely neglected even though they can persist after drinking cessation. Sleep disturbances may be the consequence of specific brain alterations, resulting in cognitive impairments. But sleep disruption may also exacerbate alcohol-related brain abnormalities and cognitive deficits through common pathophysiological mechanisms. Besides, sleep disturbances seem a vulnerability factor for the development of alcohol use disorder. From a clinical perspective, sleep disturbances are known to affect treatment outcome and to increase the risk of relapse. In this article, we conducted a narrative review to provide a better understanding of the relationships between sleep disturbances, brain and cognition in alcohol use disorder. We suggest that the heterogeneity of brain and cognitive alterations observed in patients with alcohol use disorder could at least partially be explained by associated sleep disturbances. We also believe that sleep disruption could indirectly favor relapse by exacerbating neuropsychological impairments required in psychosocial treatment and for the maintenance of abstinence. Implications for clinical practice as well as perspectives for future research are proposed.
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Affiliation(s)
- Alice Laniepce
- Normandie Univ, UNICAEN, PSL Université de Paris, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, 14000 Caen, France
| | - Najlaa Lahbairi
- Normandie Univ, UNICAEN, PSL Université de Paris, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, 14000 Caen, France
| | - Nicolas Cabé
- Normandie Univ, UNICAEN, PSL Université de Paris, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, 14000 Caen, France; Service d'Addictologie, Centre Hospitalier Universitaire de Caen, 14000 Caen, France
| | - Anne-Lise Pitel
- Normandie Univ, UNICAEN, PSL Université de Paris, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, 14000 Caen, France; Institut Universitaire de France (IUF), France
| | - Géraldine Rauchs
- Normandie Univ, UNICAEN, PSL Université de Paris, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, Neuropsychologie et Imagerie de la Mémoire Humaine, 14000 Caen, France.
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Sleep accelerates re-stabilization of human declarative memories. Neurobiol Learn Mem 2019; 162:1-8. [DOI: 10.1016/j.nlm.2019.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/25/2019] [Accepted: 04/24/2019] [Indexed: 11/24/2022]
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Miskovic V, MacDonald KJ, Rhodes LJ, Cote KA. Changes in EEG multiscale entropy and power-law frequency scaling during the human sleep cycle. Hum Brain Mapp 2019; 40:538-551. [PMID: 30259594 PMCID: PMC6865770 DOI: 10.1002/hbm.24393] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/29/2018] [Accepted: 08/31/2018] [Indexed: 02/06/2023] Open
Abstract
We explored changes in multiscale brain signal complexity and power-law scaling exponents of electroencephalogram (EEG) frequency spectra across several distinct global states of consciousness induced in the natural physiological context of the human sleep cycle. We specifically aimed to link EEG complexity to a statistically unified representation of the neural power spectrum. Further, by utilizing surrogate-based tests of nonlinearity we also examined whether any of the sleep stage-dependent changes in entropy were separable from the linear stochastic effects contained in the power spectrum. Our results indicate that changes of brain signal entropy throughout the sleep cycle are strongly time-scale dependent. Slow wave sleep was characterized by reduced entropy at short time scales and increased entropy at long time scales. Temporal signal complexity (at short time scales) and the slope of EEG power spectra appear, to a large extent, to capture a common phenomenon of neuronal noise, putatively reflecting cortical balance between excitation and inhibition. Nonlinear dynamical properties of brain signals accounted for a smaller portion of entropy changes, especially in stage 2 sleep.
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Affiliation(s)
- Vladimir Miskovic
- Department of PsychologyState University of New York at BinghamtonBinghamtonNew York
- Center for Affective ScienceState University of New York at BinghamtonBinghamtonNew York
| | | | - L. Jack Rhodes
- Department of PsychologyState University of New York at BinghamtonBinghamtonNew York
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Brawn TP, Nusbaum HC, Margoliash D. Sleep-dependent reconsolidation after memory destabilization in starlings. Nat Commun 2018; 9:3093. [PMID: 30082791 PMCID: PMC6079047 DOI: 10.1038/s41467-018-05518-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 06/25/2018] [Indexed: 12/11/2022] Open
Abstract
Reconsolidation theory describes memory formation as an ongoing process that cycles between labile and stable states. Though sleep is critical for the initial consolidation of a memory, there has been little evidence that sleep facilitates reconsolidation. We now demonstrate in two experiments that a sleep-consolidated memory can be destabilized if the memory is reactivated by retrieval. The destabilized memory, which can be impaired if an interference task is encountered after, but not before, the memory is reactivated, is then reconsolidated after sleep. In two additional experiments, we provide evidence suggesting that the learning of the interference task promotes the subsequent sleep-dependent enhancement of the original memory. These results provide novel insight into the complex mechanisms of memory processing, as well as critical evidence supporting the view that long-term memory formation involves a dynamic process of sleep-dependent consolidation, use-dependent destabilization, and sleep-dependent reconsolidation.
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Affiliation(s)
- Timothy P Brawn
- Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL, 60637, USA.
- Department of Psychology, University of Chicago, Chicago, IL, 60637, USA.
- Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
| | - Howard C Nusbaum
- Department of Psychology, University of Chicago, Chicago, IL, 60637, USA
| | - Daniel Margoliash
- Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL, 60637, USA
- Department of Psychology, University of Chicago, Chicago, IL, 60637, USA
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