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=== Communicative vs. informative ===
The first way to distinguish between categories of gesture is to differentiate between communicative gesture and informative gesture. While most gestures can be defined as possibly happening during the course of spoken utterances, the informative-communicative dichotomy focuses on
==== Informative (Passive Gestures) ====
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Communicative gestures are gestures that are produced intentionally and meaningfully by a person as a way of intensifying or modifying speech produced in the vocal tract (or with the hands in the case of sign languages), even though a speaker may not be actively aware that they are producing communicative gestures.<ref name=":12" /> For instance, on the picture above of Uncle Sam, he is pointing and sending a non-verbal form of gesture by implying he wants you to join the U.S. Army. This is a form of symbolic gesture, usually used in the absence of speech.<ref name=":5" />
== Body
Body language is a form of [[Nonverbal communication|non-verbal communication]] that allows visual cues that transmit messages without speaking. Gestures are movement that are made with the body: arms, hands, facial, etc.<ref name=":4">{{Cite journal|last=Tipper|first=Christine M.|last2=Signorini|first2=Giulia|last3=Grafton|first3=Scott T.|date=2015-08-21|title=Body language in the brain: constructing meaning from expressive movement|journal=Frontiers in Human Neuroscience|volume=9|pages=450|doi=10.3389/fnhum.2015.00450|issn=1662-5161|pmc=4543892|pmid=26347635}}</ref> Authors Barbara Pease and Allan Pease, of the "[[The Definitive Book of Body Language]]" concluded that everyone does a shoulder shrug, a gesture signifying that the person is not comprehending what they are supposed to be understanding. Also, that showing the palms of both hands to show a person is not hiding anything, and raising the eyebrows to indicate a greeting.<ref>Pease, Allan, and Barbara Pease. ''The Definitive Book of Body Language'', 2006. Print.</ref>
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