Cognitive disorders are a category of mental health disorders that primarily affect learning, memory, perception, and problem solving, and include amnesia, dementia, and delirium. Such a disorder can also affect swallow capabilities.
Augmentative and Alternative Communication (AAC) is an alternate solution to verbal communication which include Low and high tech means. Low tech refers to anything from simple paper symbols to simple augmentative devices in which you place a paper grid of symbols on the device. High tech refers to computerized augmentative communication devices with multiple pages in which an individual touches the screen or uses a pointer to click on choices.