throckmorton's reflex throckmorton's reflex throckmorton's reflex is a clinical sign in which pressure over the dorsal side of the metatarsophalangeal joint of the big toe elicits a plantar reflex. it is found in patients with pyramidal tract lesions, and is one of a number of babinski-like responses. throckmorton's reflexdifferential diagnosispyramidal tract lesions the sign is named after tom bentley throckmorton.