Hindu ideas on speech production anticipated modern scientific findings
摘要
The paper describes the Hindu philosophers’ understanding of how humans produce speech and draws parallels with our modern scientific understanding of this phenomenon. Hindu philosophical literature divides speech production into four stages. It starts in the most subtle para stage, is followed by paśyanti, the stage of ideation and visualization, progresses to madhyamā, the stage of mind, memory, and word choice, and finally manifests into the outer world as vaikhari. Vaikhari was the only stage that could be heard with our ears, while the others were “concealed” within the body. Modern neuroscientific understanding reveals that there are multiple stepwise processes in the brain that precede the uttering of audible speech, each of which, when absent, is associated with a distinct clinical presentation. We discuss what clinical syndromes might be associated with deficiencies of each of the four Hindu stages of speech. The fourfold classification of speech in Hindu philosophy bears many similarities to findings from modern psycholinguistics and neuroscience. A systematic exploration of these texts might provide useful insights into understanding and managing pathologies of spoken language.