A Study of the Brain Network Connectivity in Visual‐Word Pairing Associative Learning and Episodic Memory Reactivating Task

Abstract

Episodic memory allows a person to recall and mentally reexperience specific episodes from one’s personal past. Studies of episodic memory are of great significance for the diagnosis and the exploration of the mechanism of memory generation. Most of the current studies focus on certain brain regions and pay less attention to the interrelationship between multiple brain regions. To explore the interrelationship in the brain network, we use an open fMRI dataset to construct the brain functional connectivity and effective connectivity network. We establish a binary directed network of the memory when it is reactivated. The binary directed network shows that the occipital lobe and parietal lobe have the most causal connections. The number of edges starting from the superior parietal lobule is the highest, with 49 edges, and 31 of which are connected to the occipital cortex. This means that the interaction between the superior parietal lobule and the occipital lobe plays the most important role in episodic memory, and the superior parietal lobule plays a more causal role in causality. In addition, memory regions such as the precuneus and fusiform also have some edges. The results show that the posterior parietal cortex plays an important role of hub node in the episodic memory network. From the brain network model, more information can be obtained, which is conducive to exploring the brain’s changing pattern in the whole memory process.

Neuromodulatory effects of high-definition theta transcranial alternating current stimulation on the parietal cortex: a pilot study of healthy males

“…However, there no significant differences between the left and right hemispheres have been observed in other studies. Experiencing emotional interference due to the memory content during memory encoding or retrieval has also been found to lead to lateralization (Zhang et al, 2021). Despite this possibility, most studies have focused on detecting brain activity during performance of memory tasks without interventions.…”

Vividness of Visual Imagery Supported by Intrinsic Structural-Functional Brain Network Dynamics

“…Although we did not observe any significant node-level effects for structural connectome, we saw that the highest F scores were for the left precuneus and right intraparietal and transverse parietal sulcus for the local efficiency metric. The precuneus is a region often implicated in visual imagery and the recall of memories (Al-Ramadhani et al, 2021;Cavanna and Trimble, 2006;Knauff et al, 2003;Lundstrom et al, 2005;Zhang et al, 2021;Zheng et al, 2023). Similarly, the intraparietal and transverse parietal sulcus are also implicated in visual visual imagery and visual working memory (Bray et al, 2013;Brigadoi et al, 2017;Mellet et al, 2000;Ragni et al, 2020;Slotnick et al, 2005).…”