The Voice of Age: Why Speech and Blood Flow Don't Age in Step
In the orchestra of aging, the strings, the winds and the percussion each play at their own tempo. Speech, voice and blood flow in the brain are three instruments that go out of tune with age, but not at the same time.
Scientists asked 115 people over forty and 139 people over seventy to name as many words as possible starting with the syllable "ka" in one minute.