Apraxia and Dysarthria are disabilities that affect both symbolic and non symbolic movements.
For those who use Sign Language, word finding, grammar and signing movement problems would be in evidence.
Making purposeful movements when one has Apraxia is also an elusive task.
In the auditory modality speech could be affected or simply the ability to imitate sounds.
In the visual modality, writing, signing, drawing or pantomime would all be at risk.
Similar problems could be experienced in the Haptic modality.
Transducer problems in the Auditory modality relate to the speech mechanism.
If speech function is disabled due to a total or partial paralysis (weakness), the person is said to have a dysarthria.
In the visual modality, a person with a limb paralysis would have problems doing anything like writing, signing or pantomiming.