Dynamic Aphasia

Dynamic Aphasia

Dynamic aphasia refers to an aphasia characterized by difficulty initiating speech output, ascribed to executive dysfunction. There is a reduction in spontaneous speech, but on formal testing no paraphasias, minimal anomia, preserved repetition and automatic speech. "Incorporational echolalia", when the patient uses the examiner’s question to help form an answer, may be observed. Dynamic aphasia may be conceptualized as a variant of transcortical motor aphasia, and may be seen with lesions of dorsolateral prefrontal cortex ("frontal aphasia").

References

Alexander MP. Transcortical motor aphasia: a disorder of language production. In: D’Esposito M (ed.). Neurological foundations of cogni-tive neuroscience. Cambridge: MIT Press, 2003: 165-174
Esmonde T, Giles E, Xuereb J, Hodges J. Progressive supranuclear palsy presenting with dynamic aphasia. Journal of Neurology,Neurosurgery and Psychiatry 1996; 60: 403-410
Robinson G, Blair J, Cipolotti L. Dynamic aphasia: an inability to select between competing verbal responses. Brain 1998; 121: 77-89

Cross References