JOINT MECHANICS

1
JOINT MECHANICSJOINT INJURIES

• Joints are the points of contact (articulation)
  between two bones.
• Joints hold bone together
• Allows for flexibility and movement
• Examples of joints in our body elbows, knuckles,
  shoulders, ankles, etc.

2
3 Main Types of Joints

• FIBROUS
• bound tightly together by connective tissue
  and allow no movement. Example Sutures

3
3 Main Types of Joints

• CARTILAGINOUS
• the body of one bone connects to the body of
  another by means of cartilage, slight movement is
  possible. Example Intervertebral discs of
  spinal cord.

4
3 Main Types of Joints

• SYNOVIAL
• bony surfaces are separated by a lubricating
  fluid (the synovia) and by cartilage. They are
  also joined by ligaments. Allows the most
  movement. Example knee, shoulder, ankle

5
The Characteristics of a Synovial Joint
Bone
Blood vessels
Nerve
Joint cavity
Synovial membrane
Joint capsule
Fibrous capsule
Articular cartilage
Bursa
Tendon sheath
Membranous layer
Periosteum
Tendon
Fibrous layer
6
CHARACTERISTICS OF SYNOVIAL JOINTS

• Articulating cartilage
• protects ends of bone and allows for smooth
  contact, shock absorber
• Joint capsule
• fibrous structure made up of synovial
  membrane (allows certain nutrients to pass
  through) and fibrous capsule (keeps synovial
  fluid from leaking)
• Joint cavity
• filled with synovial fluid, prevents
  friction and provides nutrients
• Bursae (bursa)
• small, flattened fluid sacs, found between
  friction points b/w tendons, ligaments and bones

7
TYPES OF SYNOVIAL JOINTS
8
JOINTS OF THE HUMAN BODY
9
JOINTS OF THE HUMAN BODY
10
JOINTS CONTD
11
TYPES OF JOINT CONTD

• http//www.youtube.com/watch?vzWo9-3GJpr8

12
Tissue Properties

• Tendons
• Composed of collagen (bundles of white, fibrous
  protein)
• Attach muscle to bone
• Vascular
• Ligaments
• Tough bands of white, fibrous tissue
• Attach bone to bone
• Avascular

13
(No Transcript)
14
WORKSHEET

• TYPES OF SYNOVIAL JOINTS