Anatomy Chapter 8 - Fibrous Joints Quiz

Types of Joints

• Fibrous Joints: Include gomphoses, sutures, and syndesmoses.
• Gomphoses: Characterized as "peg-in-socket" joints where teeth are anchored in their sockets.
• Sutures: Joint type where bony edges interlock through short fibers.
• Syndesmoses: Joints where bones are connected solely by ligaments.

Cartilaginous Joints

• Synchondroses: Joints where bones are united by a plate of hyaline cartilage.
• Symphyses: Joints that connect bones mainly through fibrocartilage.

Synovial Joints

• All limb joints are categorized as synovial joints, characterized by a joint cavity and fluid.
• Bursae: Flattened fibrous sacs that reduce friction in synovial joints, filled with synovial fluid.

Movement Types

• Nonaxial Movement: Involves only slipping movements with no rotation.
• Uniaxial Movement: Characterized by movement along a single plane.
• Biaxial Movement: Involves movement in two planes.
• Multiaxial Movement: Allows movement across all three planes of space.

Joint Functionality and Stability

• Muscle tone contributes significantly to joint stability.
• Synovial fluid lubricates joints, facilitating smoother movements.

Specific Movements

• Supination: Refers to the rotation of the radius around the ulna, with palms facing upward.
• Shrugging Shoulders: Primarily involves elevation and depression movements.

Joint Types and Examples

• Condylar Joint: Example includes the knuckle joint where phalanges meet metacarpals.
• Temporomandibular Joint: Involves the joint used for chewing.

Joint Stability Factors

• The depth of a ball-and-socket joint's socket significantly affects its stability.
• The small size of the glenoid cavity contributes to shoulder joint instability.

Health Conditions Related to Joints

• Presence of uric acid crystals signifies gout, indicating joint health issues.

True/False Statements

• Extension is indeed the reverse of flexion.
• The statement about joint socket depth affecting stability is false.