It has probably happened to all of us, that we find ourselves thinking about a nice summer vacation, while sitting in a boring meeting. While a healthy person can easily balance the time of rest and focused attention, someone with a mental health issue whose anxious thoughts persist on revolving around an unpleasant memory or a future worry, may lose control over the natural flow of the wandering mind. On a neurological level, the brain is intrinsically organized into widespread networks, each playing an important role in our daily activities. To capture the stream of ongoing mental activities is challenging, yet crucial in order to better comprehend how thoughts evolve in the minds of patients diagnosed with mental illnesses such as post-traumatic stress disorder, depression. The hope is to provide an early diagnosis of neurodegenerative disorders, such as Alzheimer’s disease.