This chapter explores the critical role of communication in human interaction, particularly for individuals with severe disabilities. It highlights the profound impact of speech and language disorders, as well as neurological conditions, on the ability to communicate. A central focus is the use of augmentative and alternative communication (AAC) systems and brain-computer interfaces (BCIs) to assist those with profound impairments, such as individuals in a locked-in state (LIS) or complete locked-in state (CLIS) due to conditions like amyotrophic lateral sclerosis (ALS). The chapter examines noninvasive BCI technologies, detailing their evolution from early studies on cortical potentials to cutting-edge systems that enable communication without gaze fixation. These advancements have been revolutionary, offering individuals who have lost traditional means of communication a way to express themselves. The chapter also considers the broader implications of these technologies, emphasizing their role in ensuring inclusivity. By integrating technological advancements, theoretical insights, and practical applications, the chapter provides a comprehensive overview of current and future directions in communication aids for individuals with severe impairments. It underscores the fundamental right to communication and the ongoing effort to overcome physical barriers, reaffirming its essential role in the human experience.