Chapter 8: Joints
Objectives: 1) Know how joints are
classified
2) Know the a)Functional
Categories and b)
Structural Categories
Reminders: Vocab/ Stems due today
HW due tomorrow
Quiz Monday
Joint Classifications
1. Functional Classification (one we will learn)
2. Anatomical Classification
Anatomical Joint Classifications
• this classification relies solely on the anatomical or structural
organization of the joint
• these anatomical categories do have some relationship with
the functional categories
– structure = function
Functional Classifications
• Synarthrosis
– no movement
• Amphiarthrosis
– little movement
• Diarthrosis
– more movement
The shoulder joint is the most freely
moving joint in the body.
Functional Joint Classification
4 Types of Synarthrotic Joints
1. Suture (fibrous)
•
•
bound by dense fibrous connective tissue
found only in skull
4 Types of Synarthrotic Joints
2. Gomphosis (fibrous)
•
•
binds teeth to bony sockets (maxillary bone and mandible)
fibrous connection between tooth and socket is called periodontal
ligament
4 Types of Synarthrotic Joints
3. Synchondrosis (cartilaginous)
•
•
•
rigid cartilaginous bridge between 2 articulating bones
epiphyseal cartilage of long bones
between vertebrosternal ribs and sternum
4 Types of Synarthrotic Joints
4. Synostosis (bony fusion)
•
•
totally rigid fused bones
epiphyseal lines of mature long bones
2 Types of Amphiarthroses
1. Syndesmosis
–
bones connected by ligaments
•
between tibia and fibula
2. Symphysis
–
bones separated by a wedge or pad of fibrocartilage
•
•
intervertebral discs
connection between pubic bones
Diarthrosis (Synovial) Joints
• freely moveable joints
• typically located at the end of long bones