latent zone

la·tent zone

that portion of the cerebral cortex, the stimulation of which produces no movement and a lesion of which produces no symptoms; mainly the more anterior areas of the frontal lobes.
Farlex Partner Medical Dictionary © Farlex 2012

la·tent zone

(lātĕnt zōn)
Portion of cerebral cortex, the stimulation of which produces no movement and a lesion of which produces no symptoms.
Medical Dictionary for the Dental Professions © Farlex 2012