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Introduction

In recent years, transcranial direct current stimulation (tDCS) has gained significant attention as a non-invasive neuromodulation technique that can enhance cognitive function. Among the cognitive functions that have been studied in relation to tDCS, working memory performance stands out as one of the most researched domains. Working memory is a crucial cognitive function that allows for the temporary storage and manipulation of information, and has been implicated in a wide range of cognitive tasks such as problem solving, decision making, and language comprehension.

Background of Study

The use of tDCS to enhance working memory performance has shown promising results in previous studies. By applying low levels of electrical current to specific regions of the brain, tDCS has been shown to modulate neuronal excitability and improve cognitive function. However, the specific mechanisms underlying the effects of tDCS on working memory performance are still not fully understood. Furthermore, the optimal parameters for tDCS, such as electrode placement, stimulation intensity, and duration, have yet to be determined.

Problem Statement

Despite the growing body of research on the effects of tDCS on working memory performance, there is still a need for more systematic investigations to clarify the underlying mechanisms and optimize stimulation parameters. Additionally, discrepancies in the literature regarding the effectiveness of tDCS on working memory performance highlight the need for further studies to establish a clear understanding of the relationship between tDCS and working memory.

Objective of Study

The primary objective of this thesis is to investigate the effects of tDCS on working memory performance. Specifically, this study aims to examine the impact of tDCS on working memory capacity, accuracy, and reaction time. Additionally, this study seeks to explore the underlying neural mechanisms that mediate the effects of tDCS on working memory performance.

Limitation of Study

This study has several limitations that should be considered. Firstly, the sample size of participants may be limited, affecting the generalizability of the results. Additionally, the use of a single session of tDCS may not capture the long-term effects of stimulation on working memory performance. Furthermore, individual differences in brain anatomy and cognitive function may influence the results of this study.

Scope of Study

This study focuses specifically on the effects of tDCS on working memory performance in healthy adult participants. The study will utilize a within-subject design to investigate the acute effects of tDCS on working memory performance. Additionally, neuroimaging techniques such as functional magnetic resonance imaging (fMRI) will be used to examine the neural correlates of tDCS-induced changes in working memory performance.

Significance of Study

Understanding the effects of tDCS on working memory performance has important implications for cognitive enhancement and clinical applications. By elucidating the mechanisms by which tDCS modulates working memory performance, this study has the potential to inform interventions for individuals with working memory deficits, such as those with attention deficit hyperactivity disorder (ADHD) or mild cognitive impairment.

Structure of the Thesis

This thesis is organized into five chapters. Chapter One provides the introduction to the topic, background of the study, problem statement, objective of the study, limitations of the study, scope of the study, significance of the study, structure of the thesis, and the definition of terms. Chapter Two reviews the relevant literature on tDCS, working memory, and the effects of tDCS on working memory performance. Chapter Three outlines the research methodology, including participant recruitment, experimental design, tDCS protocol, working memory tasks, data analysis, and ethical considerations. Chapter Four presents the findings of the study and discusses the implications of the results. Finally, Chapter Five concludes the thesis, summarizes the key findings, and suggests directions for future research.

Definition of Terms

– Transcranial Direct Current Stimulation (tDCS): A non-invasive neuromodulation technique that delivers low levels of electrical current to specific regions of the brain.
– Working Memory: The cognitive system responsible for the temporary storage and manipulation of information required for cognitive tasks.
– Neuromodulation: The process of altering neural activity in specific brain regions using external stimuli such as electrical currents or magnetic fields.

Thesis Overview

The present thesis investigates the effects of transcranial direct current stimulation (tDCS) on working memory performance. The study aims to elucidate the impact of tDCS on working memory capacity, accuracy, and reaction time, as well as to explore the underlying neural mechanisms that mediate these effects. Through a comprehensive literature review, research methodology, and discussion of findings, this thesis aims to contribute to the understanding of the potential of tDCS as a cognitive enhancement technique.

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