Quiz 6 - Terminology and Upper Axial Muscles Flashcards Preview

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Flashcards in Quiz 6 - Terminology and Upper Axial Muscles Deck (20):
1

origin

point of muscle attachment that remains stationary

2

insertion

point of muscle attachment that is movable

3

action

the function of the muscle upon contraction

4

agonist

responsible for producing a particular movement

5

Synergist

assist the prime mover in performing an action

6

antagonist

actions oppose the action of the agonist

7

fixators

agonist and antagonist muscles contracting at the same time to stabilize a joint

8

masseter

elevates mandible
- O: zygomatic arch
- I: mandible

9

temporalis

elevates mandible
- O: temporal line
- I: coronoid process of mandible

10

medial pterygoid

elevates mandible, moves mandible side to side
- O: palatine & maxilla
- I: mandible

11

lateral pterygoid

protracts mandible, moves mandible side to side
- O: sphenoid
- I: mandible

12

sternocleidomastoid

flexes neck (together), bends neck to one side and turns face (alone)
- O: sternum & clavicle
- I: mastoid process

13

erector spinae

extend vertebral column (together), lateral flexion (alone)
- spinalis
- longissimus
- iliocostalis

14

spinalis

medial
- cervicis - extends neck
- thoracis - extends vertebrae

15

longissimus

intermediate
- capitis - extends neck (together), rotates/laterally flexes neck (alone
- cervicis - same as captious
- thoracis - extends vertebrae, lateral flexion (alone)

16

iliocostalis

lateral
- cervicis - extends/laterally flexes neck, elevates ribs
- thoracis - stabilizes thoracic vertebrae in extension
- lumborum - extends vertebrae, depresses ribs

17

posterior neck muscles

semispinalis capitis
splenius capitis
quadratus lumborum

18

semispinalis capitis

extends neck (together), laterally flames and turns head (alone)
- O: inf. cervical vertebrae and sup. thoracic vertebrae
- I: occipital bone

19

splenius capitis

extend neck
- O: inf. cervical vertebrae and sup. thoracic vertebrae
- I: mastoid process, occipital bone, sup. cervical vertebrae

20

quadratus lumborum

depress ribs (together), lateral flexion of vertebrae (alone), stabilizes diaphragm during inhalation
- O: iliac crest
- I: last rib and lumbar vertebrae