Structure and function of joints

ANATOMY AND PHYSIOLOGY FOR SPORTS MASSAGE 
THE STRUCTURE AND FUNCTION OF THE SKELETAL SYSTEM

ANATOMY AND PHYSIOLOGY FOR SPORTS MASSAGE

THE STRUCTURE AND FUNCTION OF JOINTS
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A&PHigher Education (non-degree)

This lesson contains 31 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 30 min

Items in this lesson

ANATOMY AND PHYSIOLOGY FOR SPORTS MASSAGE 
THE STRUCTURE AND FUNCTION OF THE SKELETAL SYSTEM

ANATOMY AND PHYSIOLOGY FOR SPORTS MASSAGE

THE STRUCTURE AND FUNCTION OF JOINTS

Slide 1 - Slide

What are you going to learn?
In this lesson you're going to learn to . . .
1
2
3
Describe the different type of joints.  

Explain the structure of synovial joints
Describe the joint actions at major joints.  

Explain the characteristics of ligaments and tendons. 

4

Slide 2 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Fibrous Joints
These are classed are immovable joints with no movement between bone. Held together by a thin layer of string connective tissue. 
Examples include:
  • Cranium 
  • Pelvis 
Cartilaginous Joints
Classed are slightly moveable joints where bones are attached to each other by fibrocartilage or fibro-cartilaginous discs. 

Examples include:
  • Between vertebrae
  • Pubic symphysis 
There are three main joint classifications these include: 
Synovial Joints
These joints are classed as freely moveable joints allowing a free range of movement (ROM) between articulating surfaces. 

Types include:
  • Gliding - Shoulder girdle
  • Hinge - Eblow and knee
  • Pivot - Elbow 
  • Ball and Socket = Shoulder and hip 
  • Saddle - Thumb 
  • Condyloid - Ankle and wrist

Slide 3 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Synovial Joints
Synovial Joints. Synovial joints are characterized by the presence of an articular capsule between the two joined bones. 
Bone surfaces at synovial joints are protected by a coating of articular cartilage. 
Synovial joints are often supported and reinforced by surrounding ligaments, which limit movement to prevent injury. 

There are six types of synovial joints,

Slide 4 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Pivot joints
Provide rotation. At the top of the spine, the atlas and axis form a pivot joint that allows for rotation of the head.
Ball-and-socket joints
Are a freely moving joint that can rotate on any axis. The hip and shoulder joints are examples of ball and socket joints.
Condyloid joint 
Allow for circular motion, flexion, and extension. The wrist joint between the radius and the carpal bones is an example of a condyloid joint.
Saddle joints
Allow for flexion, extension, and other movements, but no rotation. In the hand, the thumb’s saddle joint (between the first metacarpal and the trapezium) lets the thumb cross over the palm, making it opposable.
Hinge joints 
Move on just one axis. These joints allow for flexion and extension. Major hinge joints include the elbow and finger joints.
Gliding joints 
Move against each other on a single plane. Major gliding joints include the intervertebral joints and the bones of the wrists and ankles.

Slide 5 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Typical structure of a synovial joint 
Articular cartilage
Articular / hyaline cartilage- connective tissue covering the end of bones to reduce friction. 
Joint capsule
Fibrous joint capsule- stabilises the joint containing synovial fluid.
Synovial membrane
Synovial membrane- lining the fbrous capsule which secretes synovial fluid into the synovial cavity in response to movement. 
Ligaments
Ligaments- bone are attached together by strong and tough ligaments helping to prevent dislocation. 
Bursae
Bursae- small fluid sacs located around major joints between bone and tendons and/or muscles around a joint. Helping to reduce friction between tendons and bone.

Synovial fluid
Synovial fluid- is a thick liquid located between your joints. The fluid cushions the ends of bones and reduces friction when you move your joints.

Slide 6 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Flexion - Refers to movement where the angle between two bones decreases. Flexion is commonly known as bending.  

Extension - Refers to movement where the angle between two bones increases. Extension is otherwise known as straightening.  

Slide 7 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Horizontal Flexion - Refers to movement where the angle between two bones decreases and on the horizontal plane.

Horizontal Extension - Refers to movement where the angle between two bones increases and occurs on the horizontal plane.

Slide 8 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Lateral Flexion - Refers to movement of the spine laterally away from the midline of the body. This can be seen when we bend to one side.


Slide 9 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Abduction - Is movement of a body segment away from the midline of the body.

Adduction - Is movement of a body segment toward the midline of the body.

Circumduction - This is a movement where the joint is the pivot and the body segment moves in a combination of flexion, extension, adduction and abduction.




Slide 10 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Protraction - This is forward movement of the scapula that results in ‘hunching’ of the shoulders.
Retraction - This is backward movement of the scapula as they pull together to ‘square’ the shoulders and push the chest out.
Elevation - Refers to the raising of the scapula to a more superior level (shrugging the shoulders). 
Depression - Refers to the scapula moving to a more inferior position as they are pulled downwards.

Slide 11 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Supination - movement so the palm of the hand faces upward or forward (anteriorly).

Pronation - movement so the palm of the hand faces downward or backward (posteriorly).
 






Slide 12 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Eversion - Is the movement of the foot to bring the sole of the foot to face outward.

Inversion - Is the movement of the foot to bring the sole of the foot to face inward.


Slide 13 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Rotation - Refers to a pivoting or ‘twisting’ movement. Rotation is broken down further into medial and lateral rotation.

Medial rotation - The movement of a body segment where the front (anterior) of the segment rotates medially (inwards) towards the midline of the body.
Lateral rotation - The movement of a body segment where the front (anterior) of the segment rotates laterally (outwards) away from the midline of the body.


Slide 14 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Joint action at major joints

Slide 15 - Slide

Match up the descriptions to the joint actions  
Protraction 
Adduction
Lateral flexion 
where the angle between two bones increases
Refers to a pivoting or ‘twisting’ movement
when we bend to one side
where the angle between two bones decreases
 to bring the sole of the foot to face inward.
to bring the sole of the foot to face outward.
movement of a body segment toward the midline of the body
hunching’ of the shoulders

Slide 16 - Drag question

Match up the descriptions to the joint actions  
Horizontal flexion
Elevation 
Retraction 
Pronation
Supination
Depression 
Abduction
a combination of flexion, extension, adduction and abduction
Raising of the scapula to a more superior level 
Movement of a segment away from midline
the angle between two bones decreases and on the horizontal plane
 movement so the palm of the hand faces upward or forward
scapula moving to a more inferior position 
movement so the palm  faces downward or backward (posteriorly).
backward movement of the scapula

Slide 17 - Drag question

STRUCTURE & FUNCTION OF JOINTS 
JOINT 
JOINT TYPE
JOINT ACTION
Cranium / Spine (atlas/axis)
Pivot
Rotation
Spine (vertebrae)
Gliding
Flexion, extension, lateral flexion and rotation
Shoulder joint 
(humerus/scapula)
Ball and Socket
Flexion, extension, horizontal flexion and extension, adduction, abduction, medial and lateral rotation, circumduction
Shoulder girdle (sternum/clavicle/scapula)
Gliding 
Elevation, depression, protraction, retraction 
Elbow 
(humerus/ulna)
Hinge
Flexion and extension
Elbow
(radius/ulna)
Pivot 
Pronation and Supination
Wrist (carpal)
Condyloid
Flexion, extension, adduction and abduction

Slide 18 - Slide

Match the joint to the joint type and action 
Pivot - Pronation and Supination
Condyloid - Flexion, extension, adduction and abduction
Ball and Socket- Flexion, extension, horizontal flexion and extension, adduction, abduction, medial and lateral rotation
Pivot - Rotation
Gliding - Flexion, extension, lateral flexion and rotation
Hinge - Flexion, extension
Gliding - Elevation, depression, protraction, retraction 
Cranium / Spine
Elbow
(humerus/ulna)
Spine (vertebrae)
Shoulder girdle
Wrist (carpal)
Elbow
(radius/ulna)
Shoulder joint 

Slide 19 - Drag question

STRUCTURE & FUNCTION OF JOINTS 
JOINT 
JOINT TYPE
JOINT ACTION
Thumb
Saddle
Flexion, extension, adduction and abduction
Fingers (phalanges)
Hinge 
Flexion, extension
Hip 
(pelvis/femur)
Ball and Socket
Flexion, extension, horizontal flexion and extension, adduction, abduction, medial and lateral rotation, circumduction.
Knee (femur/tibia)
Hinge
Flexion and extension, slight rotation
Ankle (tibia/talus)
Hinge
Flexion and extension
Ankle (talus/calcaneus)
Condyloid
Inversion and eversion 
Toes  (phalanges)
Hinge 
Flexion, extension

Slide 20 - Slide

A saddle joint providing flexion, extension, abduction and adduction joint action?
A
Wrist
B
Fingers
C
Elbow
D
Thumb

Slide 21 - Quiz

The hip reffered to a ball and socket joint provides ______________ joint action.
A
Flexion and extension
B
Horizontal flexion and extension
C
Adduction and abduction,
D
Flexion, extension, horizontal flexion and extension, adduction, abduction, medial and lateral rotation

Slide 22 - Quiz

The Hinge joint of the knee also offers slight rotation
A
True
B
False

Slide 23 - Quiz

The Ankle (talus/calcaneus) joint providing inversion and eversion action is what type of joint?
A
Saddle
B
Hinge
C
Condyloid
D
Pivot

Slide 24 - Quiz

What joint action do the phalanges provide?
A
Flexion / extension
B
Adduction / abduction
C
Circumduction
D
Rotation

Slide 25 - Quiz

The hinge joint of the ankle providing flexion and extension is provided from what two articulating bones?
A
Tibia / Talus
B
Fibula / Talus
C
Talus / Calcaneus
D
Tibia / Calcaneus

Slide 26 - Quiz

STRUCTURE & FUNCTION OF JOINTS 
Ligaments
Structure
Band of tough, fibrous dense connective tissue made of collagen
Function
Connects bone to bone and stabilises joint and prevent unwanted movement. Lengthened ligaments will result in a less stable joint. 
Properties
Avascular (Poor blood supply)
Non-elastic (may lengthen under stress)
Non-contractile (but may shorten through disuse)

Slide 27 - Slide

STRUCTURE & FUNCTION OF JOINTS 
Tendons
Structure
Band of tough, fibrous dense connective tissue contained within a sheath
Function
Connects muscle to bone.
Properties
Avascular (poor blood supply)
Primary non-elastic- however the achilles tendon may as a spring mechanism storing energy.
Non-contractile (but may shorten through disuse). 

Slide 28 - Slide

Match up the characteristics to ligaments or tendons 
Ligaments
Tendons
Contained within a sheath
Connects muscle to bone 
Made of collagen
Avascular
Non-elastic- Except of Achilles
Non-contractile
 Connects bone to bone
Can act as a spring like mechanism
Avascular
Non-elastic
Non-contractile
Stabilises joint and prevent unwanted movement

Slide 29 - Drag question

What you have learnt
Following this lesson you should now be able to . . .
1
2
3
Describe the different type of joints.  

Explain the structure of synovial joints
Describe the joint actions at major joints.  

Explain the characteristics of ligaments and tendons. 

4

Slide 30 - Slide

Well done! Great job, you have now completed this lesson. 
Next up...The structure and function of muscular system. 

Slide 31 - Slide