Gesture

A gesture is a form of non-verbal communication or non-vocal communication in which visible bodily actions communicate particular messages, either in place of, or in conjunction with, speech. Gestures include movement of the hands, face, or other parts of the body. Gestures differ from physical non-verbal communication that does not communicate specific messages, such as purely expressive displays, proxemics, or displays of joint attention. Gestures allow individuals to communicate a variety of feelings and thoughts, from contempt and hostility to approval and affection, often together with body language in addition to words when they speak. Gesticulation and speech work independently of each other, but join to provide emphasis and meaning. Gesture processing takes place in areas of the brain such as Broca's and Wernicke's areas, which are used by speech and sign language. In fact, language is thought by some scholars to have evolved in Homo sapiens from an earlier system consisting of manual gestures. The theory that language evolved from manual gestures, termed Gestural Theory, dates back to the work of 18th-century philosopher and priest Abbé de Condillac, and has been revived by contemporary anthropologist Gordon W. Hewes, in 1973, as part of a discussion on the origin of language. Gestures have been studied throughout time from different philosophers. Marcus Fabius Quintilianus was a Roman Rhetorician who studied in his Institutio Oratoria on how gesture can be used on rhetorical discourses. One of his greatest works and foundation for communication was the "Institutio Oratoria" where he explains his observations and nature of different oratories. A study done in 1644, by John Bulwer an English physician and early Baconian natural philosopher wrote five works exploring human communications pertaining to gestures. Bulwer analyzed dozens of gestures and provided a guide under his book named Chirologia which focused on hand gestures.