What was the case of Phineas Gage

Some Procedures are not used experimentally on humans, but sometimes brain tissue is ablated for medical reasons such as the excision of tumour. Occasionally, surgical lesioning is also undertaken. Taylor's (1969) study of the effects of lesions to the left and right sides of the cortex in two patients is an example of the former. The surgical procedure of lesioning the corpus callosum as a treatment for epilepsy is an example of the latter. Sometimes, accidents cause lesions (or ablations). The case of Phineas Gage is one celebrated case in point. The case of NA, who developed amnesia following an accident with a fencing foil, is less well known but equally interesting.