American Speech-Language-Hearing Association

ASHA Glossary: Subcortical Aphasia

A form of aphasia that results from damage to subcortical regions such as the thalamus, internal capsule, and the basal ganglia. The symptoms can mirror those arising from cortical lesions, and subcortical damage can also co-occur with cortical lesions. Aphasic symptoms can arise from diaschisis (remote effects), such as subcortical inputs to the frontal lobe being altered, or may directly stem from damage to subcortical areas that support language processing.

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