Effects of Brain Stimulation During a Daytime Nap on Memory Consolidation in Patients With Mild Cognitive Impairment

Mild Cognitive Impairment, So Stated Clinical Trial

Official title:

Impact of Transcranial Slow Oscillating Stimulation on Memory Consolidation During Slow Wave Sleep of a Daytime Nap in Patients With Mild Cognitive Impairment(MCI)

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01782365
• Other study ID #: Nap-tSOS-MCI
• Status: Completed
• Phase: N/A
• Start date: August 8, 2013
• Est. completion date: August 30, 2016

Study information

• Verified date: May 2021
• Source: Charite University, Berlin, Germany
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The beneficial effect of nocturnal as well as daytime sleep on memory consolidation is well-documented in young, healthy subjects. Slow wave sleep (SWS), in particular, with its slow oscillating activity have shown to enhance declarative, hippocampus-dependent memory representations. This impact of sleep on memory performance can be additionally enhanced by exogeneous induction of transcranial slow oscillating stimulation (tSOS) within the frequency range of SWS in humans (0,7- 0,8 Hz) during sleep, as has been demonstrated in young, healthy subjects. If patients with amnestic mild cognitive impairment (MCI)- usually characterized by initial difficulties in hippocampus dependent memory functions - benefit from transcranial slow oscillatory stimulation (tSOS) during sleep as well has not been studied so far. The primary goal of the study is therefore to investigate the impact of oscillating current stimulation (tSOS) during a daytime nap on declarative memory consolidation in MCI patients.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 16
• Est. completion date: August 30, 2016
• Est. primary completion date: April 26, 2016
• Accepts healthy volunteers: No
• Gender: All
• Age group: 50 Years to 90 Years

Eligibility

Inclusion Criteria:

• amnestic and amnestic plus MCI-patients:

1. Concern reflecting a change in cognition reported by patient or informant or clinician (i.e., historical or observed evidence of decline over time)

2. Objective evidence of memory impairment; additional cognitive domains may be affected as well;

3. Preservation of independence in functional abilities

4. no dementia

• age: 50-90 years

Exclusion Criteria:

• untreated severe internal or psychiatric diseases
• epilepsy
• other severe neurological diseases eg., previous major stroke, brain tumour
• dementia
• contraindications to MRI

Related Conditions & MeSH terms

• Cognitive Dysfunction
• Mild Cognitive Impairment, So Stated

Intervention

Device:
• SHAM stimulation
no stimulation
• 0,75 Hz stimulation

Locations

Country	Name	City	State
Germany	Charite CCM Neurologie Berlin	Berlin

Sponsors (1)

Lead Sponsor	Collaborator
Charite University, Berlin, Germany

Country where clinical trial is conducted

Germany, 

References & Publications (8)

Diekelmann S, Born J. The memory function of sleep. Nat Rev Neurosci. 2010 Feb;11(2):114-26. doi: 10.1038/nrn2762. Epub 2010 Jan 4. Review. — View Citation

Ferrucci R, Mameli F, Guidi I, Mrakic-Sposta S, Vergari M, Marceglia S, Cogiamanian F, Barbieri S, Scarpini E, Priori A. Transcranial direct current stimulation improves recognition memory in Alzheimer disease. Neurology. 2008 Aug 12;71(7):493-8. doi: 10.1212/01.wnl.0000317060.43722.a3. Epub 2008 Jun 4. — View Citation

Ladenbauer J, Ladenbauer J, Külzow N, de Boor R, Avramova E, Grittner U, Flöel A. Promoting Sleep Oscillations and Their Functional Coupling by Transcranial Stimulation Enhances Memory Consolidation in Mild Cognitive Impairment. J Neurosci. 2017 Jul 26;37 — View Citation

Mander BA, Santhanam S, Saletin JM, Walker MP. Wake deterioration and sleep restoration of human learning. Curr Biol. 2011 Mar 8;21(5):R183-4. doi: 10.1016/j.cub.2011.01.019. — View Citation

Marshall L, Helgadóttir H, Mölle M, Born J. Boosting slow oscillations during sleep potentiates memory. Nature. 2006 Nov 30;444(7119):610-3. Epub 2006 Nov 5. — View Citation

Mednick S, Nakayama K, Stickgold R. Sleep-dependent learning: a nap is as good as a night. Nat Neurosci. 2003 Jul;6(7):697-8. — View Citation

Mednick SC, Cai DJ, Kanady J, Drummond SP. Comparing the benefits of caffeine, naps and placebo on verbal, motor and perceptual memory. Behav Brain Res. 2008 Nov 3;193(1):79-86. doi: 10.1016/j.bbr.2008.04.028. Epub 2008 May 8. — View Citation

Naismith SL, Lewis SJ, Rogers NL. Sleep-wake changes and cognition in neurodegenerative disease. Prog Brain Res. 2011;190:21-52. doi: 10.1016/B978-0-444-53817-8.00002-5. Review. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Retention of declarative memories after 0.75 Hz stimulation during SWS, vs after sham stimulation during SWS	Retention between stimulation conditions (0.75 Hz during SWS, vs sham stimulation during SWS) in the declarative memory task.	4 Weeks
Secondary	Amount of Slow wave Sleep, spindels, eeg-correlates, further memory systems	Amount of slow wave sleep assessed by standard polysomnographic criteria in 0,75 Hz vs SHAM stimulation during SWS.; Spindel activity during sleep indicated via several spindel parameters like number, duration, frequency of spindles; compared between 0,75 Hz and SHAM stimulation during SWS.; Neuronal correlates (EEG-power in slow oscillation frequency bands induced by 0,75 Hz vs SHAM stimulation during SWS; EEG-correlates of encoding and retrieval of a declarative memory task).; Performance in further memory systems (procedural), compared between 0,75 Hz and SHAM stimulation during SWS.	4 Weeks