Protraction
Encyclopedia
Protraction is the anatomical term of motion
for anterior movement of an anatomical part of the body forward (anteriorly). This can include the shoulders, jaw, pelvis, etc.
It is the opposite of retraction
.
For example, for anterior movement of the arm
s at the shoulder
s the major muscles involved include:
Anatomical terms of motion
The movement of body structures is accomplished by the contraction of muscles. Muscles may move parts of the skeleton relatively to each other, or may move parts of internal organs relatively to each other. All such movements are classified by the directions in which the affected structures are moved...
for anterior movement of an anatomical part of the body forward (anteriorly). This can include the shoulders, jaw, pelvis, etc.
It is the opposite of retraction
Retraction (kinesiology)
Retraction is the anatomical term of motion for posterior movement of the arms at the shoulders. It is the opposite of protraction. Major muscles involved include: * Rhomboid major muscle* Rhomboid minor muscle* Trapezius muscle-External links:* *...
.
For example, for anterior movement of the arm
Arm
In human anatomy, the arm is the part of the upper limb between the shoulder and the elbow joints. In other animals, the term arm can also be used for analogous structures, such as one of the paired forelimbs of a four-legged animal or the arms of cephalopods...
s at the shoulder
Shoulder
The human shoulder is made up of three bones: the clavicle , the scapula , and the humerus as well as associated muscles, ligaments and tendons. The articulations between the bones of the shoulder make up the shoulder joints. The major joint of the shoulder is the glenohumeral joint, which...
s the major muscles involved include:
- Serratus anterior muscleSerratus anterior muscleThe serratus anterior is a muscle that originates on the surface of the upper eight or nine ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula.-Origin:...
- Pectoralis minor musclePectoralis minor muscleThe pectoralis minor is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major.-Origin and insertion:...