1.5 Movements At Joints Flashcards
What are movement types?
Names used to identify direction of movement at joints
List movement types
Flexion
Extension
Adduction
Abduction
Rotation
Circumduction
Plantar-Flexion
Dorsi-Flexion
What is range of movement?
Different joints allow different movements to take place. Joints that can perform many different styles of movement have a larger range of movement.
What is Flexion?
The angle at a joint is deceased.
Seen as bending at a hinge/condyloid joint, or when a limb moves in a forwards direction at a ball and socket joint.
What is Extension?
The angle at a joint is increased.
Seen as straightening at a hinge/condyloid joint, or when a limb moves in a backwards direction at a ball and socket joint.
What is Abduction?
When a limb is moved away from the midline of the body at a ball and socket/condyloid joint
What is Adduction?
When a limb is brought back towards the midline of the body at a ball and socket/condyloid joint
What is Rotation?
Twisting action where a part of the body twists around its long axis at a pivot/ball and socket joint
What is Circumduction?
A combination of Flexion, abduction, adduction, extension that looks like you are drawing a circle in the air.
Possible at ball and socket/condyloid joints
What is Dorsi-Flexion?
Only seen at ankle (hinge) - when toes are raised towards shin
What is Plantar-Flexion?
Only seen at ankle (hinge) - when toes are pointed away from the shin
What do ligaments do?
Ligaments connect bone to bone and hold joints together.
They are tough and slightly elastic, so they help to prevent dislocations.
What is a dislocation?
When a bone is forced out of place
What do tendons do?
Tendons connect muscles to bones, ensuring that when a muscle contracts the effort is transferred to the bone and movement is created
How do tendons and ligaments aid movement?
Tendons allow movement to happen
Ligaments prevents movements going to far and dislocating the joint
