Source memory performance is modulated by transcranial direct current stimulation over the left posterior parietal cortex

A systematic review and meta-analysis of the effects of transcranial direct current stimulation (tDCS) on episodic memory

“…For instance, as a function of the emotional valence of the stimuli [20,21], of whether memories were reactivated or not [38], or of the delay of the memory test [39,40]. Other studies found effects in one memory outcome and not another, for example, in source memory and not old/new recognition [41]. Finally, in some studies the effects were specific to some stimulation parameters, for instance, they…”

Effects of Anodal Transcranial Direct Current Stimulation Over the Ventrolateral Prefrontal Cortex on Episodic Memory Formation and Retrieval

“…Amongst almost thirty published articles however, only a few tDCS studies reported enhancing effects of anodal tDCS as evidenced by a higher rate of correct responses, or by changes in combined indices of recognition memory such as d' or the discrimination index Pr (Jacobson et al, 2012; Javadi and Walsh, 2012 Experiment 1; Javadi and Cheng, 2013;Gray et al, 2015;Lu et al, 2015 Experiment 1; Pisoni et al, 2015a). Other studies reported no effects in one or more experimental conditions, or even impairing effects (Zwissler et al, 2014;Nikolin et al, 2015; Pergolizzi and Chua, 2015 Experiment 1; Pisoni et al 2015b Experiment 1; Smirni et al, 2015 Experiment 2;Chen et al, 2016;Manuel and Schneider, 2016;Gaynor and Chua, 2017). The mixed findings are likely due to diversity of stimulation parameters applied, such as the montage, site and duration of administration, the memory phase of administration (encoding vs retrieval), the time of administration with respect to the task (online vs offline), or the specific encoding or retrieval tasks used (incidental vs intentional encoding, recall vs recognition).…”

Information content best characterises the hemispheric selectivity of the inferior parietal lobe: a meta-analysis

“…variability in arousal/task engagement, may elicit left but not right IPL activity and be misattributed as demonstrating specific differences in memory processing between the hemispheres. Unfortunately, the potentially inflated frequency of left IPL activity by DMN functions combined with a lack of focus on the role of the right IPL in memory retrieval has led many recent investigations of IPL memory function to focus solely on the left IPL 2 , 4 , 6 , 48 – 49 . This has occurred at the expense of a targeted exploration of the functional role of the right IPL, potentially obscuring the observation of key findings.…”