his theory of hyperacuity in 1899. Philosophically, Volkmann was an evangelical who opposed materialism and gave a number of speeches against the materialist assumption of identity between the body and mind. Works Anatomy of Animals (1831–33) The Independence of the Sympathetic System of Nerves (1842) Elasticity of Muscles (1856) Physiological Investigations in the Field of Optics (Physiologische Untersuchungen im Gebiete der Optik) (1863) Family Richard von Volkmann, his son, became a distinguished surgeon. References Sources B.G. Firkin & J.A.Whitworth (1987). Dictionary of Medical Eponyms. Parthenon Publishing. External links Short biography and bibliography in the Virtual Laboratory of the Max Planck Institute for the History of Science Halle University's page (in German) Entry at Whonamedit.com biographical dictionary of medical eponyms 1801 births 1877 deaths German physiologists People from the Kingdom of Saxony Leipzig University alumni Academic staff of Leipzig University Academic staff of the University of Tartu Academic staff of the Martin Luther University of Halle-Wittenberg Rectors of the University of Tartu