Dynamic Von Frey Instrument (Plantar Anesthesiometer) assesses sensitivity to light touch and is used in quantifying analgesic effects, detecting nerve sensitivity and neuropathy. A tiny filament lightly touches the plantar surface, and gentle force is increased steadily until the paw flinches. Latency until paw withdrawal, and the actual force at which withdrawal occurred, are recorded. The instrument features an integrated printer and direct PC connectivity. A dedicated software package is available for computer connection, data output and analysis. The Dynamic Plantar Aesthesiometer works with all rodent model organisms, and is microprocessor controlled.