Glossary

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Broca's Aphasia(also: Nonfluent Aphasia, Expressive Aphasia, Motor Aphasia)

A type of aphasia caused by damage to Broca's area in the left frontal lobe of the brain, typically resulting from stroke. People with Broca's aphasia have difficulty producing speech and writing but generally retain good comprehension of spoken and written language. Their…

Dysphonia(also: voice disorder, phonation disorder)

A voice disorder characterized by abnormal pitch, loudness, quality, or resonance of the voice resulting from impaired function of the larynx or vocal cords. Dysphonia can range from mild hoarseness to complete voice loss (aphonia) and may be caused by vocal cord nodules,…

Intensive Care Unit(also: ICU, Critical Care Unit)

A specialized hospital department that provides continuous monitoring and life-support treatment for patients with severe or life-threatening conditions. ICU patients frequently experience temporary communication disabilities due to intubation, sedation, or physical weakness,…

Intubation(also: Endotracheal Intubation)

A medical procedure in which a tube is inserted through the mouth or nose into the trachea (windpipe) to maintain an open airway and assist with mechanical ventilation. Intubation renders patients unable to speak because the tube passes through or bypasses the vocal cords. In…

Language Impairment(also: Language Disorder, Language Disability)

A reduced ability to understand or produce spoken, written, or signed language that is not due to hearing loss, intellectual disability, or lack of exposure to language. Language impairments can be developmental (present from childhood) or acquired (resulting from brain injury…

Personal Digital Assistant(also: PDA, Handheld Computer, Pocket PC)

A portable handheld computing device popular in the late 1990s and early 2000s that combined features like a calendar, contacts, note-taking, and basic application support in a pocket-sized form factor with a touchscreen interface. In accessibility research, PDAs like the iPAQ…

Symbol-based AAC(also: Picture-based AAC, Pictographic AAC, Picture Communication Symbols)

Symbol-based AAC refers to augmentative and alternative communication systems whose vocabulary is represented by graphic symbols, line drawings, photographs, or pictograms rather than (or alongside) written words. Users select symbols on a paper board, a dedicated…

Tracheostomy(also: Tracheotomy)

A surgical procedure that creates an opening (stoma) in the front of the neck into the trachea (windpipe), through which a tube is inserted to provide an airway for breathing. Like intubation, a tracheostomy typically prevents or significantly impairs speech because air no…

Voice Disabilities(also: Voice Disorders, Speech Impairment, Aphonia)

Conditions that partially or completely impair a person's ability to produce speech using their natural voice. Voice disabilities range from mild hoarseness or reduced volume to complete inability to vocalise (aphonia). Causes include laryngeal conditions, neurological disorders…

Wernicke's Aphasia(also: Fluent Aphasia, Receptive Aphasia, Sensory Aphasia)

A type of aphasia caused by damage to Wernicke's area in the left temporal lobe of the brain. People with Wernicke's aphasia can produce fluent speech with normal rhythm and grammar, but their words often don't make sense—they may use incorrect words, made-up words (neologisms),…

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