Introduction of masking noise so the patient cannot hear this own speech does not significantly alter the number of articulation errors he makes. Articulatory performance is not improved when the patient is given an opportunity to delay his imitative response. Articulatory accuracy is not influenced by the instructional set created in the patient. Associated features 1. Many patients exhibit oral apraxia.
Some apraxic patients demonstrate difficulty in auditory perception .
Some apraxic patients display impairment of oral sensation and perception as measured by tests of oral form identification, two-point discrimination, and mandibular kinesthesia. Errors are most often on consonants occurring initially in words, predominantly on those phonemes and clusters of phonemes requiring more complex muscular adjustment. As patients struggle to avoid articulatory error by careful programming of muscle movements, they slow down, space their words and syllables evenly, and stress them equally. Makes many errors of articulation, recognizes errors, and makes repeated attempts to correct the errors Phonemes and words that are used more frequently are produced with greater accuracy. Speech sound of a word may be produced out of sequence.