Thoracic spine - origin, insertions and actions

Question 1

what is the origin of the erector spinae - iliocostalis thoracis?

Answer 1

TP of c7

top of lower 6 ribs

Question 2

what is the insertion of the erector spinae - iliocostalis thoracis?

Answer 2

top of upper 6 ribs

Question 3

what is the action of the erector spinae - iliocostalis thoracis?

Answer 3

extension and side flexion

Question 4

what is the origin of the erector spinae - spinalis thoracis?

Answer 4

SP of T11, T12, L1 and L2

Question 5

what is the insertion of the erector spinae - spinalis thoracis?

Answer 5

SP of T4 - T8

Question 6

what is the action of the erector spinae - spinalis thoracis?

Answer 6

extension

Question 7

what is the origin of the erector spinae - longissimus thoracis?

Answer 7

TP of lumbar

Question 8

what is the insertion of the erector spinae - spinalis thoracis?

Answer 8

TP of thoracic

lower 9 ribs

Question 9

what is the action of the erector spinae - spinalis thoracis?

Answer 9

extension and side flexion

Question 10

what is the origin of the semispinalis?

Answer 10

AP of C3 - C6

TP of C7, T1 - T6

Question 11

what is the insertion of the semispinalis?

Answer 11

nuchal line of occipital bone

Question 12

what is the action of the semispinalis?

Answer 12

vertebral column extension and draws head backwards

Question 13

what is the origin of the rotatores?

Answer 13

TP of thoracic spine

Question 14

what is the insertion of the rotatores?

Answer 14

SP 1-2 levels above its origin

Question 15

what is the action of the rotatores?

Answer 15

extension and rotation

Question 16

what is the origin of the rhomboid major and minor?

Answer 16

minor - C7 - T1

major - T2 - T5

Question 17

what is the insertion of the rhomboid major and minor?

Answer 17

medial border of the scapular

Question 18

what is the action of the rhomboid major and minor?

Answer 18

retraction of the scapular

Question 19

what is the origin of the trapezius?

Answer 19

T1 - T12

occipital bone

Question 20

what is the insertion of the trapezius?

Answer 20

lateral third of clavicle, acromion and spine of the scapular

Question 21

what is the action of the trapezius?

Answer 21

upper - elevates shoulders and extends the head

middle - retracts shoulders

lower - depresses shoulders

Question 22

what is the origin of the serratus anterior?

Answer 22

1st - 9th rib

Question 22

what is the insertion of the serratus anterior?

Answer 22

medial border of the scapular

Question 23

what is the action of the serratus anterior?

Answer 23

protraction and upwards rotation of the scapular

Question 24

what is the origin of the serratus posterior inferior?

Answer 24

SP of T11 - L3

Question 25

what is the insertion of the serratus posterior inferior?

Answer 25

lower 9-12 ribs

Question 26

what is the action of the serratus posterior inferior?

Answer 26

draws ribs down and back

Question 27

what is the origin of the serratus posterior superior?

Answer 27

SP of C7 - T3

Question 28

what is the insertion of the serratus posterior superior?

Answer 28

upper 2-5 ribs

Question 29

what is the action of the serratus posterior superior?

Answer 29

elevates upper ribs

Question 30

what is the origin of the pectorals minor?

Answer 30

ribs 3-5

Question 31

what is the insertion of the pectorals minor?

Answer 31

coracoid process

Question 32

what is the action of the pectorals minor?

Answer 32

elevates ribs and depresses scapular

Question 33

what is the origin of the diaphragm?

Answer 33

XP, ribs 7-12 and anterior surface L1 - L3

Question 34

what is the insertion of the diaphragm?

Answer 34

blends with the Anterior Longitudinal Ligament on the spine

Question 35

what is the action of the diaphragm?

Answer 35

expands thoracic cavity and compresses abdominal cavity

Question 36

what is the origin of the internal intercostals?

Answer 36

superior border of ribs 2-12

Question 37

what is the insertion of the internal intercostals?

Answer 37

inferior border of ribs 2-12

Question 38

what is the action of the internal intercostals?

Answer 38

depresses ribs and forced expiration

Question 39

what is the origin of the external intercostals?

Answer 39

lower ribs 1-11

Question 40

what is the insertion of the external intercostals?

Answer 40

upper borders of ribs 1-11

Question 41

what is the action of the external intercostals?

Answer 41

elevates ribs and inhalation