Definition of "frontal lobe" [frontal lobe]

• The largest and most anterior part of each cerebral hemisphere. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Three of these seven, viz. I, II and III, are apparently best regarded as examples of frontal lobe atrophy, and their grandiosity may resemble that of certain cases of general paresis."
• "The fact that cases of paresis with delusions were found to have their lesions in the frontal lobe, whereas non-delusional cases showed no such marked lesions, is of interest in the light of the present paper because three cases of senile psychosis were found to have delusions of grandeur and, although they are demonstrably not paretic, they also show mild frontal lobe changes supported by microscopic study."
• "The problems of the "pleasant" delusion group, as superficially defined, turned out to be a. the problem of a group of senile psychoses with grandiose delusions and frontal lobe atrophy; b. the problem of felt passivity under divine influence; c. the problem of phthisical euphoria."