Dynamic aphasia: the selective impairment of verbal planning.
A single case study of a patient, ROH, who had a space occupying lesion in the left frontal lobe is reported. His selective speech disorder had all the hallmarks of a dynamic aphasia. Tests of sentence completion, phrase generation and sentence generation were administered. His ability to generate sentences was significantly better given a pictorial context than a verbal context. Although he could order a sequence of pictures, he had the greatest difficulty in ordering the constituent words of a sentence. Luria's hypothesis that dynamic aphasia is due to an impairment of inner speech which provides "the linear scheme of a sentence" is discussed. It is concluded that dynamic aphasia does not reflect a deficit of language processing but rather the selective impairment of verbal planning.
Costello
A L
AL
National Hospital, Queen Square, London.
Warrington
E K
EK
D000328:Adult; D001037:Aphasia / Q000000981:diagnostic imaging / Q000209:etiology / Q000523:psychology*; D001932:Brain Neoplasms / Q000150:complications / Q000000981:diagnostic imaging; D004827:Epilepsy / Q000209:etiology; D005625:Frontal Lobe / Q000000981:diagnostic imaging; D005909:Glioblastoma / Q000150:complications / Q000000981:diagnostic imaging; D006801:Humans; D007807:Language Tests; D008297:Male; D009483:Neuropsychological Tests; D014057:Tomography, X-Ray Computed; D014705:Verbal Behavior / Q000502:physiology*