Question

What is the difference between the flexion and extension?

Answer 1

Joints and muscles of the animal body are involved in motion. The straightening and contraction of muscles perform the motion of the joints. Flexion and extension are two anatomical terms used to describe angular motion. The direction of the movement or the change in the angle between the two bones determines the type of motion as a flexion or extension. The main difference between flexion and extension is that flexion is the action that brings the two bones together, decreasing the angle between the bones whereas extension is the action that increases the angle between the two bones.

Difference Between Flexion and Extension

Definition

Flexion: Flexion refers to a movement that decreases the angle between two body parts.

Extension: Extension refers to the process of straightening that increases the angle between two body parts.

Angle Between Two Bones

Flexion: The angle between the two joins decreases during the flexion.

Extension: The angle between the two joints increases during the extension.

Action

Flexion: Flexion leads to the bending of the bones, bringing the two bones together.

Extension: Extension leads to the straightening of the bones, dispersing the two bones.

Examples

Flexion: Upward phase of a bicep curl and bending of the knee are examples of flexion.

Extension: Downward phase of a bicep curl and standing up are examples of the extension.

Abnormal Movement

Flexion: The abnormal movement of flexion is hyperflexion.

Extension: The abnormal movement of extension is hyperextension.

Conclusion

Flexion and extension are two types of angular moments of the body in which both joints and muscles are involved in the motion. Flexion is the bending, which decreases the angle between two anatomical parts of the body. The extension is the opposite of the flexion in which the angle between the two anatomical parts is increased. The main difference between flexion and extension is the change in the angle between the anatomical parts of the body during each type of the motion.

Answer 2

The difference between the flexion and extension:

Flexion:

• Bending a joint can be understood as flexion. It happens, when the angle of a joint is decreased.
• The example of flexion is when we performing biceps than curl happens in our elbow.
• The body segment gets smaller in flexion.

Extension:

• The straightening of a joint is called extension. It happens when the angle of joint increases.  
• When a high jumper takes off and due to this the knee is extending is an example of extension.
• Extension and flexion is opposite to each other.

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