Exam 1 Muscle Actions - Cumulative

Question 1

trapezius actions

Answer 1

descending - elevation of scapula
transverse - retraction of scapula
ascending - depression of scapula

Question 2

latissimus dorsi actions

Answer 2

medial rotation of humerus, ADduction of arm, extension of arm
“pull ups”

Question 3

rhomboid minor actions

Answer 3

retraction of scapula

Question 4

rhomboid major actions

Answer 4

retraction of scapula

Question 5

levator scapula actions

Answer 5

raising scapula superiorly

Question 6

serratus posterior superior action

Answer 6

aids in respiration

Question 7

serratus posterior inferior action

Answer 7

aids in respiration

Question 8

intermediate extrinsic back muscles function

Answer 8

aids in respiration

Question 9

extrinsic back muscles function

Answer 9

limb mobility, respiration

Question 10

intrinsic back muscles function

Answer 10

aid in posture, acts on vertebral column

Question 11

splenius capitis actions

Answer 11

bilat - extends head and neck
unilat - ipsilateral flexion and rotation

Question 12

splenius cervicis actions

Answer 12

bilat - extends head and neck
unilat - ipsilateral flexion of spine

Question 13

iliocostalis actions

Answer 13

bilateral - extension of spine
unilat - ipsilateral flexion of spine

Question 14

longissimus actions

Answer 14

bilateral - extension of spine and head
unilateral - ipsilateral flexion of spine and head

Question 15

spinalis actions

Answer 15

bilateral - extension of spine and head
unilateral - ipsilateral flexion of spine and head

Question 16

semispinalis capitis actions

Answer 16

bilateral - extends head/cervical/thoracic spine
unilateral - ipsilateral flexion of head and contralateral rotation of head/cervical/thoracic spine

Question 17

semispinalis cervicis actions

Answer 17

bilateral - extends cervical/thoracic spine
unilateral - ipsilateral flexion and contralateral rotation of cervical/thoracic spine

Question 18

semispinalis thoracis actions

Answer 18

bilateral - extends thoracic spine
unilateral - ipsilateral flexion of spine and contralateral rotation of thoracic spine

Question 19

multifidus actions

Answer 19

bilateral - stabilization of vertebral column, extension of spine
unilateral - ipsilateral flexion and contralateral rotation

Question 20

rotatores actions

Answer 20

proprioception, stabilization of spine, local extension/rotation (contralateral) of vertebrae

Question 21

rectus capitis posterior major actions

Answer 21

extend head at atlantooccipital joint
ipsilateral flexion and rotation

Question 22

rectus capitis posterior minor actions

Answer 22

extends head at atlantooccipital joint, ipsilateral flexion and rotation

Question 23

obliquus capitis superior actions

Answer 23

extend head at atlantooccipital joint
ipsilateral flexion and rotation

Question 24

obliquus capitis inferior actions

Answer 24

ipsilateral rotation

Question 25

deltoid action

Answer 25

clavicular - flexion of arm, medial rotation of arm acromial - ABduction of arm spinal - extension, lateral rotation

Question 26

teres major actions

Answer 26

medial rotation of arm, ADduction

Question 27

supraspinatus actions

Answer 27

initiates ABduction (0-15 degrees), supports shoulder joint

Question 28

infraspinatus actions

Answer 28

lateral rotation of arm, supports shoulder joint

Question 29

teres minor actions

Answer 29

lateral rotation of arm, supports shoulder joints

Question 30

subscapularis actions

Answer 30

medial rotation of arm, ADduction, supports shoulder joint