Retraction

Definition

Retraction is the movement of a body part in the posterior direction, toward the back of the body. It commonly occurs in joints such as the shoulder blades and jaw.

5 Must Know Facts For Your Next Test

1. Retraction moves a body part backward along a horizontal plane.
2. The scapulae (shoulder blades) undergo retraction when they move closer to the spine.
3. Retraction can be observed in movements such as pulling the jaw backward.
4. Muscles involved in retraction include the rhomboids and middle trapezius for the scapula.
5. Opposite to protraction, which involves moving a body part forward.

Review Questions

• Which muscles are primarily responsible for scapular retraction?
• Describe an example of retraction occurring in the human body.
• How does retraction differ from protraction?

Related terms

Protraction: Movement of a body part forward along a horizontal plane.

Elevation: The upward movement of a body part.

Depression: The downward movement of a body part.