a physical condition in which there is a disturbance of normal functioning

partial or total loss of articulate speech resulting from lesions of the central nervous system

a disorder of the vocal organs that results in the loss of voice

a speech disorder in which the same word is repeated several times in succession

impaired articulatory ability resulting from defects in the peripheral motor nerves or in the speech musculature

impaired ability to express ideas verbally; usually resulting from difficulties of reasoning (as in feeblemindedness or certain psychoses)