is an idiopathic condition that results in unilateral damage to the facial nerve that usually resolves spontaneously. Flaccid dysarthria is usually mild, with mild articulatory imprecision as the primary speech characteristic.

The originates in the primary motor cortex and is responsible for rapid, discrete, volitional movement of the limbs and articulators for speech.

is a neurological disease that causes degeneration of lower motor neurons, resulting in flaccid paralysis of muscles and eventual muscle atrophy. Speech sounds weak, hypernasal, monpitched, and articulation is imprecise.