Muscles

Question 1

What is the vasculature and innovation of muscle?

Answer 1

Vasculature: receive a generous supply of blood from at least two neighbouring arteries that enter separately and then connect within the muscle
Innovation: this is when the peripheral nerves around specific muscles cause them to contract or relax

Question 2

What are muscles that produce a certain effect called?
What are muscles that actively oppose movements called?

Answer 2

Agonists
Antagonists
(roles reversed)

Question 3

What are synergists and fixators and what are their purposes?

Answer 3

Fixator: These are muscles that stabilise joints, they don’t improve movement. The fixation and stabilisation of the joint involves co-contraction from opposing muscles when the joint is moving

Synergists: Muscles that don’t directly facilitate or oppose a movement, instead they can modify the action of the agonist to help prevent unwanted side effects

Question 4

What is the origin versus the insertion of the muscle?

Answer 4

Origin: indicates more proximal or central attachment of the muscles

Insertion: indicates the more distal or peripheral attachments of the muscles