Back Myology

Question 1

What are the shapes of skeletal muscle? (9)

Answer 1

flat, pennate, fusiform, digastric, multiventral, multicaudal, serrated, circular/sphincteral, quadrate

Question 2

What are pennate muscles? What are the types?

Answer 2

feather-like; types describe where muscle is on side of tendon
unipennate
bipennate
multipennate

Question 3

What are fusiform muscles? What are the types?

Answer 3

spindle-shaped w/ thick belly and tapered ends; name of type describes how many heads/origins
bicipital
tricipital
quadracipital

Question 4

What are digastric muscles?

Answer 4

muscle with 2 bellies separated by tendon

Question 5

What are multiventral muscles?

Answer 5

1 muscle broken up by multiple tendons (ab muscles)

Question 6

What are multicaudal muscles?

Answer 6

(caudal = tail) Muscle with multiple tails/tendons

Question 7

What are serrated muscles?

Answer 7

muscles with a serrated edge; usually attach to ribs

Question 8

What are circular or sphincteral muscles?

Answer 8

surrounding an opening

Question 9

What are quadrate muscles?

Answer 9

equal sided; square

Question 10

What does the agonist do in movement?

Answer 10

activates a specific movement

Question 11

What does the antagonist do?

Answer 11

opposes the action of the agonist

Question 12

What does the synergist do?

Answer 12

complements the agonist and prevents the movement of an intervening joint when agonist passes more than one joint

Question 13

what does the fixator do?

Answer 13

stabilizes joints or proximal part of a joint while the distal portion is in motion