## 2 Related Works
The researchers attached the biofeedbackdevice to the participants and instructed them on maintaining an upright posture. Using motion analysis and discomfort assessments, this study found that the biofeedback device significantly improved the posture of individuals experiencing neck discomfort during computer-related tasks. Forward head posture is a common issue with potential health risks, and various treatments have been explored. Common biofeedback methods are reviewed in Table 2, although biofeedback can refer to other devices as well [30; 31]. In terms of performance, according to the Table 2, advanced sEMG and VR/AR methods provide more complete feedback but are less accessible due to their complexity. On the other hand, wearable sensors and visual and auditory feedback devices have slightly different performance, are more accessible, and are more popular while requiring less specific settings [38]. With respect to the aforementioned biofeedback types and reviewed papers, the present research highlights the benefits of biofeedback treatment, which is cost-effective, has a shorter treatment duration, and has minimal side effects compared to other methods. In the context of the current research endeavor, the objectives are multifaceted and pioneering. The core aim of this research centers on the development of a system which, for the first time, harnesses accelerometer sensors to comprehensively characterize neck behavior. In the field of healthcare, the development of cost-effective and user-friendly medical devices constitutes a significant and imperative concern [39; 40]. This system, seamlessly integrated with the MATLAB program's graphical user interface, serves the purpose of visually rendering neck behavior to the individual. This pioneering research thereby represents a pivotal step forward in harnessing biofeedback methodologies to address anatomical issues and empower individuals to actively participate in the amelioration of their health and wellbeing. This study focuses on the efficacy of biofeedback treatment, highlighting its distinct advantages over alternative methods. Biofeedback therapy stands out due to its cost effectiveness, short and effective treatment, and absence of adverse effects on patients. In this endeavor, we aim to address the following objectives:  
1. Apply biofeedback (visual feedback) techniques in an innovative manner to address anatomical issues related to the cervical vertebrae. \begin{table}
\begin{tabular}{p{142.3 pt} p{142.3 pt}} \hline \hline
**Method** & **Principle** \\ \hline Surface Electromyography (sEMG) & Measures muscle activity in the neck and upper back, offering feedback on muscle activation during poor posture [32]. \\ \hline Pressure biofeedback & Utilizes a device under the neck or upper back to measure pressure changes, aiding in teaching individuals how to maintain proper posture [33]. \\ \hline Wearable Posture Sensors & Devices such as posture correctors or sensors provide real-time alerts or reminders when users deviate from correct posture, encouraging better habits [34]. \\ \hline Visual Feedback Systems & Mirrors, video monitoring, or software applications offer visual cues about current posture, allowing users to adjust and correct their alignment [35]. \\ \hline Auditory Feedback Devices & Devices produce sounds or alerts when posture deviates, serving as a reminder to adjust and maintain proper alignment [36]. \\ \hline Virtual Reality (VR) Augmented Reality (AR) & Postures is simulated to provide interactive feedback in order to help individuals learn to correct their forward head posture [37]. \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Biofeedback methods and principle. Develop a pioneering system that utilizes accelerometer sensors to comprehensively characterize neck angular behavior. * Seamlessly integrate the developed system with the MATLAB program's graphical interface. * Provide individuals with a visual representation of their neck behavior to enhance awareness.