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 Joints and Movements of the Body. Objectives  Demonstrate knowledge of the joints of body.  Demonstrate knowledge of the movements of the body. 

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Presentation on theme: " Joints and Movements of the Body. Objectives  Demonstrate knowledge of the joints of body.  Demonstrate knowledge of the movements of the body. "— Presentation transcript:

1  Joints and Movements of the Body

2 Objectives  Demonstrate knowledge of the joints of body.  Demonstrate knowledge of the movements of the body.  Apply knowledge to analyze various types of strength- training exercises.

3 Types of Joints  Joints occur where 2 or more bones meet. Also called articulation. They are held together by ligaments.  Joints are essential for movement.  There are three main types of joints:  Fibrous – immovable (skull)  Cartilaginous – slightly movable (vertebrae)  Synovial – freely movable (shoulder, elbow, knee, etc.)

4 Synovial Joints  Freely movable joints that permit movement in one or more directions  5 common types of synovial joints:  Ball and Socket joints  Hinge joints  Pivot joints  Saddle joints  Gliding joints

5 Ball and socket joints permit movement in many directions.

6 Hinge joints permit back and forth motion.

7 Pivot joints allow one bone to rotate around another.

8 Saddle joints permit a wide range of movement

9 Gliding joints slide past each other.

10 Structure of Joints – Bursae and Synovial Fluids  In synovial joints, there are small capsules of synovial fluids called bursae.  A bursa acts as a shock absorber and reduces friction between bones of a joint.

11 Knee Joint

12 Joint Disorders  Excessive strain on a joint may produce inflammation, in which excess fluid causes swelling, pain, heat, and redness.  Inflammation of a bursa is called bursitis.  Inflammation of the joint itself is called arthritis.

13 Types of Movement  Flexion – the angle of the joint is decreased.  Extension – the angle of the joint is increased.  Abduction – a body part is moved away from the middle of the body.  Adduction – a body part is moved towards the middle of the body.  Rotation – a body part is moved either outwards or inwards around its long axis.

14 Types of Movement  Supination – a rotation of the forearm which causes the palm of the hand to face upwards.  Pronation – a rotation of the forearm which causes the palm of the hand to face downwards.  Inversion – a rotation of the sole of the foot inwards.  Eversion – a rotation of the sole of the foot outwards.


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