Hinge joints

Definition

Hinge joints are synovial joints that allow movement primarily in one plane, similar to the motion of a door hinge. These joints permit flexion and extension movements.

5 Must Know Facts For Your Next Test

1. Hinge joints are found in the human body at locations such as the elbow, knee, and interphalangeal joints of the fingers and toes.
2. The structure of hinge joints includes bones connected by strong ligaments to provide stability while allowing movement.
3. Synovial fluid within hinge joints reduces friction and facilitates smooth motion.
4. Hinge joints are crucial for performing activities that involve bending and straightening limbs.
5. Common injuries associated with hinge joints include sprains, strains, and conditions like arthritis which can affect joint function.

Review Questions

• What type of movement do hinge joints primarily allow?
• Name three locations in the human body where hinge joints can be found.
• What role does synovial fluid play in the function of hinge joints?

Related terms

Ball-and-Socket Joints: These are synovial joints that allow movement in multiple planes, including rotation (e.g., shoulder and hip).

Ligaments:

Strong connective tissues that connect bones at a joint, providing stability while allowing limited movement.

Synovial Fluid: A viscous fluid within synovial joints that reduces friction between articular cartilages during movement.