A Level PE - The Musculoskeletal System 1.4

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Last updated: January 24, 2018
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First submittedJanuary 24, 2018
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Definition
Keyword
Refers to the bones that meet and move at the joint
Articulating
Divides the body into right and left haves
Sagittal plane
Divides the body into front and back haves
Frontal plane
Divides the body into upper and lower haves
Transverse plane
Runs from side to side across the body
Transverse axis
Runs from front to back
Sagittal axis
Runs from top to bottom
Longitudinal axis
Decreasing the angle between the bones of a joint
Flexion
Increasing the angle between the bones of a joint
Extension
Pointing the toes/pushing up on to your toes
Plantar-flexion
Definition
Keyword
Pulling the toes up to your shin
Dorsi-flexion
Increasing the angle beyond 180° between the bones of a joint
Hyper-extension
Movement away from the midline of the body
Abduction
Movements towards towards the midline of the body
Adduction
Movement of the arm forward across the body at 90° to shoulder abduction
Horizontal adduction
The muscle that is responsible for the movement that is occuring
Agonist
The muscle that works in opposition to the agonist
Antagonist
When a muscle shortens under tension
Concentric contraction
When a muscle lengthens under tension or performs negative work and acts like a brake
Eccentric contraction
When a muscle is under tension but there is no visible movement
Isometric contraction
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