Virtual Reality

ABSTRACT - Virtual means not real, where reality can be define as real environment, or we can said that virtual reality is a computer-simulated reality that immerse and presence the user. This is one technology that allow users to feel the object more real. This technology using three-dimensional that simulated physical user presence and allowing them to interact with it. Virtual Reality create sensory experiences such as sight, touch, hearing and the others in order to makes the users immerse and presence between 3D object and the environment. Most of the virtual realities nowadays displayed on the computer screen or used by special equipment that divided by two categories which is fully immersive display and semi immersive display. This

This two show a successful of when them conduct an experiment in rehabilitation of stroke patient, and cessation program to smoker. When this two task are conducted, they show are positive scan imaging in fMRI and achieve their aim. VR seem very interesting application in rehabilitation of stroke patient. Stroke patient may face a difficulty to their certain part in their face due to paralysis of limbs and must go through physical treatment to regain control. VR show the interactive between the immersive virtual reality environment make the rehabilitation to be interactive and enjoyable intervention method to improve upper extremity of motor function. By conducting an experimenter-blind randomized by studying the stroke patients by Yeungham University and Sungkyunkwan University in Korea and Hampton University in the United States, it proven the validity of compatible between this two field by showing the result of in interesting brain activity pre- and post-VR. The study have found that the cortical activation was reorganized before VR, from ipsilateral activation, and after VR, to contralateral activation (Figure 1) among the movement of brain activity. It shows a positive changes to brain activity in neural organization and was the pioneering studies that explored the effectiveness of VR in

It can be studied more realistic stimuli but however it is provided without standard solution exists for combining of both method. There are several challenges in order to put this kind of field together. This obstacle appears in many way. An immersive virtual reality system requires a series of equipment and environmental constrains that an fMRI magnet bore typically cannot accommodate[9]. It is because in order for the user to perceived the immersion and presence in virtual world are required to head-tracking sensors, a head mounted display, a surround sound system, and an input device to navigate the environment. The space in fMRI machine scan only limit to be lying only inside it magnet tube and unable the patient to move their head, the patient also keeps distracted by the claustrophobic environment. This is one of the major challenges in virtual fMRI machine that found by the researcher that difficult to utilize fMRI technology to study effect of virtual reality without the feeling presence and immersion into virtual environment. As addition, the other obstacle that barring in this technology is their cost that can be classifying as expensive. Even if without virtual reality appearances in this functional MRI it is already costly compared to another method. This show that it price always expensive and if it being together then that technology could costly