Protopathic and epicritic sensibility are lost over the radial side of the forearm.
The areas of epicritic and of protopathic insensibility are illustrated in Fig. 91.
epicritic ep·i·crit·ic (ěp'ĭ-krĭt'ĭk)adj. Of, relating to, or mediating the ability to discriminate slight differences in sensory stimuli, especially of touch and temperature.