Chapter 8 Muscles Flashcards
What is the stationary attachment end of the skeletal muscle called?
origin
What is the attachment to mobile end of the skeletal muscle called?
insertion
What is the prime mover that produces most of the force for muscle movement called?
agonist
What is the part of the muscle action that opposes the prime mover and prevents excessive movement in muscle action?
antagonist
Name
Describe function
occipitofrontalis m.
lift eyebrows, furrow brow
Name
Describe function
orbicularis oculi mm.
eye squinting
Name
Describe function
zygomaticus mm.
smiling
Name
describe function
orbicularis oris m.
pucker lips
name
describe function
temporalis mm.
elevation of mandible
biting/chewing
name
describe function
masseter mm.
elevation of mandible
biting/chewing
name
describe function
external oblique
compression of the abdominal viscera
name
describe function
internal oblique
forced expiration, defecation, childbirth
name
describe function
rectus abdominis
flexion/stabilization of the trunk
name
describe function
transverse abdominis
wraps around spine for protection and stability
name the blue region
describe function
diaphragm
inhalation
name the blue region
describe function
external intercostals
increase inhalation
name the blue region
describe function
internal intercostals
exhalation
name the pink highlighted muscle
what is their main function?
rotator cuff
hold head of humerus in the glenoid cavity
name the blue muscle
describe function
supraspinatus
abduct arm away over the head
name the blue muscle
define function
infraspinatus
external rotation
name the blue muscle
describe function
teres minor
external rotation
name the blue muscle
describe function
subscapularis
internal rotation
name the blue muscle
describe function
biceps brachii
elbow flexion
name the blue muscle
describe function
triceps brachii
elbow extension
