Protraction
Protraction
Protraction (/proʊˈtrækʃən/) is a term used in anatomy and physiology to describe the anterior (forward) movement of an anatomical part of the body.
Etymology
The term "protraction" is derived from the Latin protractus, meaning "drawn out" or "extended". It is composed of pro-, meaning "forward", and -tractus, meaning "drawn".
Related Terms
- Retraction: The opposite of protraction, retraction refers to the posterior (backward) movement of an anatomical part.
- Anterior: Refers to the front or forward part of the body or body part.
- Posterior: Refers to the back or rear part of the body or body part.
- Anatomical terms of motion: Terms used to describe different types of motion in the body.
Usage in Anatomy and Physiology
In anatomy and physiology, protraction is used to describe the movement of a body part in the anterior direction along a transverse plane. For example, the scapula or shoulder blade can be protracted to move it forward and laterally away from the spine. Similarly, the mandible or lower jaw can be protracted to jut it out forward.
See Also
External links
- Medical encyclopedia article on Protraction
- Wikipedia's article - Protraction
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