Scelta multipla
In standard anatomical position, what is the primary action of the erector spinae muscle group when contracting bilaterally?
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10. Muscles
Muscle Actions
Scelta multipla
In muscle actions, what term describes the muscle that provides the major force (primary mover) for a specific movement?
A
Fixator
B
Synergist
C
Antagonist
D
Agonist
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Understand the roles of different muscles during movement: muscles can act as agonists, antagonists, synergists, or fixators depending on their function in the action.
Define the term 'agonist': it is the muscle primarily responsible for producing a specific movement, often called the 'primary mover'.
Define 'antagonist': this muscle opposes the action of the agonist, relaxing while the agonist contracts to allow smooth movement.
Define 'synergist': these muscles assist the agonist by adding extra force or reducing unwanted movements.
Define 'fixator': these muscles stabilize the origin of the agonist so that it can act more efficiently.
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