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Joint/Articulation Classified by: Structure (composition) Function (range of motion)

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Presentation on theme: "Joint/Articulation Classified by: Structure (composition) Function (range of motion)"— Presentation transcript:

1 Joint/Articulation Classified by: Structure (composition) Function (range of motion)

2 Types of Joints Synarthosis – – Immovable Joints; usually joined by strong fibers – No joint cavity Examples: sutures, joint binding tooth to socket, growth plate

3 Amphiarthrosis No joint cavity Slightly movable joint Composed of fibrous joints Composed of cartilage joints Example: Fibrous – Membrane between radius and ulna Examples: Cartilage Vertebra Discs, Pubic Symphysis

4 Diarthrosis/Synovial Joint Greater range of motion Joint cavity is present Contains synovial fluid

5 Six General Characteristics – Articular Cartilage Covered with hyaline cartilage – Joint Cavity Space filled with synovial fluid – Articular capsule Fibrous capsule found on the periosteum of long bones – Synovial fluid Viscous fluid contains macrophages lubricates – Reinforcing ligaments – Fat Pads Extra padding

6 Types of Synovial Joints Pivot Joints Allows for rotation One bone rotates around another Examples Atlas and axis; Radius and ulna

7 Hinge Joints One bone fits into another Motion is along a single plane Examples: knee and elbow, phalanges

8 Ball and Socket Freely moving joint Head of bone articulates with fossa of another Examples: glenoid fossa and humerous; acetabulum and femur

9 Gliding Bones slide across one another Bones must have flattened or curved faces to glide Movement is limited Examples: carpals, tarsals, between vertebra

10 Saddle Shape resembles saddle Permits angular motion; including circumduction but not rotation Examples: Thumb

11 Types of Movement Gliding- two or more bones slide past each other

12 Rotation – turning around the longitudinal axis of body – Pronation and supination are a form of rotation

13 Pronation- turn palms posterior Supination – turn palms anterior (Anatomical position) Terms only apply to movement of radius

14 Angular Movements - decrease or increase the angle between two bones Flexion – decreases the angle between two bones Extension – increases the angle between two bones Hyperextension – increase the angle by > 180°

15 Angular Movements flexion, extension, adduction, abduction and circumduction Abduction – move away from body’s midline – To be abducted Adduction – move toward body’s midline – Add to body Circumduction – cone- shaped movement

16 Dorsiflexion – point the toe up (superior) Plantar flexion – point the toe down (inferior) Eversion – turn ankle laterally Inversion- turn ankle medially (most common way to twist ankle)

17 Protraction- move body part anteriorly Retraction- move body part posteriorly

18 Elevation – movement of the body superiorly Depression – movement of the body inferiorly


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