nervous system symptom aphasia true true SyOID:14727 Aphasia is a nervous system symptom characterized by a loss or impairment of the power to use or comprehend words usually resulting from brain damage. doid/symp duplicate https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5639272/ symptoms inability to comprehend language ICD9CM_2005:784.3 SYMP:0000508 UMLS_ICD9CM_2005_AUI:A0025556 UMLS_CUI:C0003537