intrinsic muscles of deep back

Question 1

what innervates intrinsic musculature?

Answer 1

dorsal rami

Question 2

layers of deep musculature?

Answer 2

superficial, intermediate, and deep

Question 3

superficial muscles of intrinsic back?

Answer 3

splenius capitis, splenius cervicis

Question 4

intermediate muscles of deep back?

Answer 4

erector spinae group

Question 5

deep muscles of intrinsic back?

Answer 5

transversospinalis group and others

Question 6

splenius capitis origin and insertion

Answer 6

origin: caudal half of lig nuchae and SPs of C7-T3/4
insertion: mastoid process and occipital bone inferior to lateral 1/3 of superior nuchal line

Question 7

blood supply and innervation of splenius capitis?

Answer 7

innervation: dorsal rami of middle cervical nerves
blood supply: muscular and descending branches of occipital artery, superficial branch of transverse cervical artery

Question 8

actions of splenius capitis

Answer 8

unilaterally roate head and head and bilaterally extend head and neck. ipsilateral rotation.

Question 9

splenius cervicis origin and insertion?

Answer 9

origin: narrow, tendinous band from SPs of T3-T6
insertion: posterior tubercles of TPs of upper 2-3 CV

Question 10

innervation and blood supply of splenius cervicis?

Answer 10

innervation: dorsal rami lower cervical nerves
blood supply: muscular and descending branches of occipital artery as well as superficial branch of transverse cervical artery

Question 11

actions of splenius cervicis?

Answer 11

unilaterally draws head to one side and slightly rotates. bilaterally extends head.

Question 12

muscles of erector spinae group?

Answer 12

iliocostalis (lumborum, thoracis, cervicis), longissimus (thoracic, cervicis, capitis), and spinalis (thoracis)

Question 13

origin and insertion of iliocostalis lumborum?

Answer 13

origin: thoracolumbar fascia
insertion: lower borders of lower 6-7 ribs near angles

Question 14

innervation and blood supply of iliocostalis lumborum?

Answer 14

innervation: dorsal rami of lumbar spinal nerves
blood supply: posterior intercostal arteries and lumbar arteries

Question 15

action of iliocostalis lumborum?

Answer 15

extension and lateral flexion of vertebral column

Question 16

origin and insertion of iliocostalis thoracis?

Answer 16

origin: upper borders of lower 6 ribs medial to insertions of iliocostalis lumborum
insertion: upper 6 ribs and sometimes TPs of C7

Question 17

innervation and blood supply of iliocostalis thoracis?

Answer 17

innervation: dorsal rami of thoracic spinal nerves
blood supply: posterior intercostal arteries

Question 18

action of iliocostalis thoracis?

Answer 18

extension of vertebral column

Question 19

origin and insertion of iliocostalis cervicis?

Answer 19

origin: upper 6 ribs medial to insertion of iliocostal thoracis
insertion: TPs of C4-6

Question 20

innervation and blood supply of iliocostalis cervicis?

Answer 20

innervation: dorsal rami spinal nerves C4-6
blood supply: posterior intercostal arteries

Question 21

action of iliocostalis cervicis?

Answer 21

extension and lateral flexion of vertebral column

Question 22

origin and insertion of longissimus thoracis?

Answer 22

origin: thoracolumbar fascia, accessory processes of LV
insertion: TPs of lower 9 TV and lower 9 ribs

Question 23

innervation and blood supply of longissimus thoracis?

Answer 23

innervation: dorsal rami of spinal nerves T1-T12
blood supply: posterior intercostal and lumbar arteries

Question 24

action of longissimus thoracis?

Answer 24

extension and lateral flexion of vertebral column

Question 25

origin and insertion of longissimus cervicis?

Answer 25

origin: TPs of upper 4-6 TV medial to insertion of longissimus thoracis
insertion: TPs C2-6

Question 26

innervation and blood supply of longissimus cervicis?

Answer 26

innervation: dorsal rami of spinal nerves C4-C8
blood supply: posterior intercostal arteries

Question 27

action of longissimus cervicis?

Answer 27

extension and lateral flexion of vertebral column

Question 28

origin and insertion of longissimus capitis?

Answer 28

origin: medial to upper border of longissimus cervicis, articular processes of lower four CV
insertion: posterior edge of mastoid process

Question 29

innervation and blood supply of longissimus capitis?

Answer 29

innervation: dorsal rami spinal nerves C3-8
blood supply: mu