At NJ Bioscience Center Healthy Volunteers  Female Age 20 to 65; Good or corrected hearing; Good or corrected vision; No motor or cognitive impairments; English speakers; Those with low propensity for simulation sickness (as determined by the Simulation Sickness Questionnaire [Kennedy et al, 1993]). Either healthy or having had stage II or stage III breast cancer; Montreal Cognitive Assessment (MoCA) Score 10-25 indicating mild to moderate impairment [Chapman 2016] or 26-30 indicating normal cognition;  EXCLUSION CRITERIA  Male; Female participants younger than 20 or older than 65; High propensity for simulation sickness (as determined by Simulation Sickness Questionnaire screening); Those with severe visual neglect or legally blind; Those with severe hearing loss or deafness; Those with uncontrolled hypertension (>190/100 mmHg); Those with severe cognitive impairment (MoCA score<10); Current diagnosis of moderate-severe depression (Beck Depression Inventory II score of 17-63); a history of psychiatric illness, defined as serious psychiatric illness such as bipolar mood disorder and schizophrenia, or requiring psychiatric hospitalization. a history of or current substance abuse; a previous head injury resulting in loss of consciousness; a prior diagnosis of neurological illness; a current or prior diagnosis of brain cancer; non-English speakers; Those unable to reliable participate in pre-study assessment due to any reason; Those with co-morbidities limiting arm and neck motor function (ex. lymphedema, chronic pain, severe arthritis); Less than 1 month post first chemotherapy regimen or starting chemotherapy during 16 weeks post screening (as chemotherapy during study participation is a confounding factor); Those with Stage IV (metastatic) breast cancer will be excluded; Those presenting with multiple cancers, such as breast and arm bone cancer, or breast and brain cancer; Those who are unwilling to allow a home inspection to ascertain Internet quality, determine best placement for the experimental or sham systems, for installation and removal of the systems and necessary repairs.