People with good hearing also have a keen sense of touch; people with
impaired hearing generally have an impaired sense of touch. Extensive
data supporting this hypothesis was presented by Dr. Henning Frenzel and
Professor Gary R. Lewin of the Max Delbrück Center for Molecular
Medicine (MDC) Berlin-Buch, Germany. The two researchers showed that
both senses — hearing and touch — have a common genetic basis.