scholarly journals The effect of cathodal transcranial direct current stimulation during rapid eye-movement sleep on neutral and emotional memory

2018 ◽  
Vol 5 (7) ◽  
pp. 172353 ◽  
Author(s):  
Jennifer M. Johnson ◽  
Simon J. Durrant
Keyword(s):  
Word Recognition ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Declarative Memory ◽  
Recognition Task ◽  
Positive Association ◽  
Emotional Memory ◽  
Emotional Word ◽  
Direct Current Stimulation ◽  
Theta Frequency

Sleep-dependent memory consolidation has been extensively studied. Neutral declarative memories and serial reaction time task (SRTT) performance can benefit from slow-wave activity, characterized by less than 1 Hz frequency cortical slow oscillations (SO). Emotional memories can benefit from theta activity, characterized by 4–8 Hz frequency cortical oscillations. Applying transcranial direct current stimulation (tDCS) during sleep entrains specific frequencies to alter sleep architecture. When applying cathodal tDCS (CtDCS), neural inhibition or excitation may depend on the waveform at the applied frequency. A double dissociation was predicted, with CtDCS at SO frequency improving neutral declarative memory and SRTT performance, and theta frequency CtDCS inhibiting negative emotional memory. Participants completed three CtDCS conditions (Theta: 5 Hz, SO: 0.75 Hz and control: sham) and completed an SRTT and word recognition task pre- and post-sleep, comprising emotional and neutral words to assess memory. In line with predictions, CtDCS improved neutral declarative memory when applied at SO frequency. When applied at theta frequency, no negative emotional word memory impairment was found but a positive association was found between post-stimulation theta power and emotional word recognition. SRTT performance was also not altered by either CtDCS frequency. Future studies should investigate overnight theta CtDCS and examine the effects of CtDCS during and after stimulation.

scholarly journals Effects of transcranial direct current stimulation combined with listening to preferred music on memory in older adults

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ricky Chow ◽  
Alix Noly-Gandon ◽  
Aline Moussard ◽  
Jennifer D. Ryan ◽  
Claude Alain
Keyword(s):  
Older Adults ◽  
Working Memory ◽  
Recognition Memory ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Digit Span ◽  
Recognition Task ◽  
Music Listening ◽  
Subsequent Performance ◽  
Direct Current Stimulation

AbstractListening to autobiographically-salient music (i.e., music evoking personal memories from the past), and transcranial direct current stimulation (tDCS) have each been suggested to temporarily improve older adults’ subsequent performance on memory tasks. Limited research has investigated the effects of combining both tDCS and music listening together on cognition. The present study examined whether anodal tDCS stimulation over the left dorsolateral prefrontal cortex (2 mA, 20 min) with concurrent listening to autobiographically-salient music amplified subsequent changes in working memory and recognition memory in older adults than either tDCS or music listening alone. In a randomized sham-controlled crossover study, 14 healthy older adults (64–81 years) participated in three neurostimulation conditions: tDCS with music listening (tDCS + Music), tDCS in silence (tDCS-only), or sham-tDCS with music listening (Sham + Music), each separated by at least a week. Working memory was assessed pre- and post-stimulation using a digit span task, and recognition memory was assessed post-stimulation using an auditory word recognition task (WRT) during which electroencephalography (EEG) was recorded. Performance on the backwards digit span showed improvement in tDCS + Music, but not in tDCS-only or Sham + Music conditions. Although no differences in behavioural performance were observed in the auditory WRT, changes in neural correlates underlying recognition memory were observed following tDCS + Music compared to Sham + Music. Findings suggest listening to autobiographically-salient music may amplify the effects of tDCS for working memory, and highlight the potential utility of neurostimulation combined with personalized music to improve cognitive performance in the aging population.

ASSOCIATION OF TRANSCRANIAL DIRECT CURRENT STIMULATION AND NEUROFEEDBACK, IN THE DECLARATIONAL MEMORY AND CEREBRAL ARTERIAL FLOW IN UNIVERSITY YOUNG PEOPLE - A RANDOMIZED, DOUBLE-BLIND AND CONTROLLED STUDY PROTOCOL (Preprint)

2022 ◽  
Author(s):  
Leandro H. Grecco
Keyword(s):  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Declarative Memory ◽  
Brain Activity ◽  
Low Cost ◽  
Memory Function ◽  
Well Being ◽  
Controlled Study ◽  
Double Blind ◽  
Direct Current Stimulation

BACKGROUND The performance of a task depends on ongoing brain activity which can be influenced by attention, excitement or motivation. Scientific studies confirm that mindfulness leads to better performance, health and well-being. However, these cognitive efficiency modulating factors are nonspecific, can be difficult to control, and are not suitable to specifically facilitate neural processing. OBJECTIVE The aim of the present study is to evaluate the effects of tDCS associated with Neurofeedback on declarative memory and cerebral blood flow in university students. METHODS In this work, we will use Transcranial Direct Current Stimulation (tDCS), a low-cost physical resource, easy to apply and few adverse effects, associated with a Neurofeedback resource. This, in turn, has been shown to be a training program capable of improving working memory function. RESULTS The trial began in December 2021 and we are currently performing the statistical analysis for the secondary outcomes. CONCLUSIONS We believe that the resources used in this study can help improve some aspects of declarative memory, since learning and memory processes modify the brain. Strategies to enhance the acquisition, storage and use of information must be able to sensitize (motivate) and involve volunteers in the learning process, thus clarifying their role CLINICALTRIAL https://ensaiosclinicos.gov.br/rg/RBR-4m5j4s

scholarly journals Anodal Transcranial Direct Current Stimulation over the Cerebellum Enhances Sadness Recognition in Parkinson’s Disease Patients: a Pilot Study

2021 ◽  
Author(s):  
Fabiana Ruggiero ◽  
Michelangelo Dini ◽  
Francesca Cortese ◽  
Maurizio Vergari ◽  
Martina Nigro ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Facial Expressions ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Negative Emotions ◽  
Recognition Task ◽  
Small Sample ◽  
Direct Current Stimulation ◽  
Cerebellar Tdcs

Abstract Emotional processing impairments, resulting in a difficulty to decode emotions from faces especially for negative emotions, are characteristic non-motor features of Parkinson’s disease (PD). There is limited evidence about the specific contribution of the cerebellum to the recognition of emotional contents in facial expressions even though patients with cerebellar dysfunction often lose this ability. In this study, we aimed to evaluate whether the recognition of facial expressions can be modulated by cerebellar transcranial direct current stimulation (tDCS) in PD patients. Nine PD patients were enrolled and received anodal and sham tDCS (2 mA, 20 min), for 5 consecutive days, in two separate cycles at intervals of at least 1 month. The facial emotion recognition task was administered at baseline (T0) and after cerebellar tDCS on day 5 (T1). Our preliminary study showed that anodal cerebellar tDCS significantly enhanced emotional recognition in response to sad facial expressions by about 16%, but left recognition of anger, happiness, and neutral facial expressions unchanged. Despite the small sample size, our preliminary results show that anodal tDCS applied for five consecutive days over the cerebellum modulates the way PD patients recognize specific facial expressions, thus suggesting that the cerebellum plays a crucial role in recognition of negative emotions and corroborating previous knowledge on the link between social cognition and the cerebellum.

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