The region includes parts of the language area known as Wernicke's area. Another key region is Broca's area, located at the front of the brain. A track of fibers connects Broca's area with the POT area. Wilkins and Wakefield assert that these parts of the brain could have supported language skills even though they actually developed for other purposes. This leads to another controversial finding.
Some experts argue that language evolved gradually from simpler forms of communication.
Apes have different calls for various types of danger. Linguists doubt it. They say that the supporting brain structures evolved gradually, according to Darwinian principles. Language researchers largely have avoided the issue of its evolution, or have pursued unproductive lines of inquiry. Many linguists have not pursued questions of evolution because they appreciate the complexity of language.