Articular System Ch 3 (PTA128)

Function of a joint?

• Allow motion, Bear weight, Provide Stability

• Strong

• Heavy

• Hard and dense type of bone

Joints may contain synovial fluid, synovial fluid —> (a)  

Types of Joints ? (3)

• Fibrous

• Amphiarthrodial (Cartilaginous)

• Diarthrodial (Synovial)

• Fiber

Fibrous Joint?

• Thin layer of fibrous periosteum between the 2 bones

• Lined by hyaline or Fibrocartilage between 2 bones

• No direct contact between 2 bones

Cartilaginous Joint?

• Thin layer of fibrous periosteum between the 2 bones

• No direct contact between 2 bones

• Lined by hyaline or Fibrocartilage between 2 bones

Synovial or Diarthrodial Joint?

• Thin layer of fibrous periosteum between the 2 bones

• Disc connect vertebrae

• No direct contact between 2 bones.

  Joint space or cavity.

Synarthrosis: (Sutures of Skull)

• Thin layer of fibrous periosteum.

  Ends of the bones interlock.

  No move movement.

  Purpose: provide shape and strength.

• Discs connected the 2 bones

• Held together with fibrous tissue, ligaments.

  Small amount of movement.

• “Bolted” together

Gomphosis?

• “Bolted” together

• Discs connected the 2 vertebrae

• Held to get her with fibrous tissue, ligaments

Syndesmosis?

• “Bolted” together

• Ends of the bones interlock

• Held together with fibrous tissue, ligaments.

  Small amount of movement.

Synarthrosis movement?

• No movement

• Small amount of movement

• Small amount - bending, twisting, compression

• Allows free motion