Deep Back

Question 1

What is the longest muscle of the erector spinae?

Answer 1

Longissimus

Question 2

what is the actions of the longissimus when both sides are used together?

Answer 2

primary extensors of vertebral column, control movement of bending down

Question 3

what is the action of the longissimus when only one side is in use?

Answer 3

lateral flexion

Question 4

what are the superficial muscles of the back?

Answer 4

Splenius capitis and Splenius cervicis

Question 5

What are the intermediate muscles (errector spinae) of the back?

Answer 5

Iliocostalis, Longissimus, and Spinalis

Question 6

What are the deep muscle of the back?

Answer 6

Semispinalis (thoracis, cervicis, capitis), Multifidus, and Rotatores (brevious and longus)

Question 7

What is the attachment and innervation for the splenius capitis?

Answer 7

att. : nuchal ligament, C7-T4 spinous processes.

inn. : posterior rami of spinal nerves

Question 8

what is the attachment and innervation for the splenius cervicis?

Answer 8

att.: nuchal ligament, T3-T6 spinous processes. C1-C3 transverse processes

Question 9

What are the attachments for the Iliocostalis?

Answer 9

att.: iliac crest, sacrum, lumbar and sacral spinous processes, supraspinous and sacroiliac ligaments, ribs, cervical transverse processes

Question 10

What are the attachments for the Logissimus?

Answer 10

iliac crest, sacrum, lumbar and sacral spinous processes, supraspinous and sacroiliac ligaments, ribs, transverse and mastoid process

Question 11

What are the attachments for Spinalis?

Answer 11

iliac crest, sacrum, lumbar and sacral spinous processes, supraspinous and sacroiliac ligaments, spinous processes

Question 12

What nerve innervates the iliocostalis?

Answer 12

posterior rami of spinal nerve

Question 13

what nerve innervates the longissimus?

Answer 13

posterior rami of spinal nerves

Question 14

what innervates the spinalis?

Answer 14

posterior rami of spinal nerves

Question 15

What is the action of both sides the Splenius capitis?

Answer 15

Head and neck extension

Question 16

What is the action of on ly one Splenius capitis?

Answer 16

turn face to the same side of the muscle being used, it laterally flex and rotates the head

Question 17

What is the action of the Iliocostalis when both muscles are being used?

Answer 17

primary extensor of vertebral column, controls movement of bending down

Question 18

What is the action of only one Iliocostalis muscle being used?

Answer 18

lateral flexion

Question 19

What is the function of the Splenius cervicis?

Answer 19

Both sides: extend head and neck

One side: turn face to same side

Question 20

What are the functions of the Longissimus?

Answer 20

both sides: primary extensors of vertebral column, control movement of bending down
one side: lateral flexion

Question 21

What is the action of the longissimus capitis?

Answer 21

both sides: extend head and neck

one side: turn face to same side

Question 22

what is the function of the Spinalis?

Answer 22

both sides: extend vertebral column

one side: lateral flexion

Question 23

What are the attachments of the Semispinalis?

Answer 23

C4-T12 transverse processes. Spinous processes, superior nuchal line. Span 4-6 segments

Question 24

What are the attachments for the Multifidus?

Answer 24

Sacrum, PSIS, transverse processes. Spinous processes Span 2-4 segments. Best developed in lumbar region.

Question 25

what are the attchments for the Rotatores?

Answer 25

Transverse processes. spinous processes Span 1-2 segments. Best developed in thoracic region.

Question 26

What are the actions of the Semispinalis?

Answer 26

extension, contralateral rotation. Capitis rotates to same side.

Question 27

What is the action of the Multifidus?

Answer 27

Stabilize vertebrae during local movement

Question 28

What is the action of the Rotatores?

Answer 28

Stabilize vertebrae during local movement

Question 29

What nerve innervates all the deep muscles of the back?

Answer 29

posterior rami of spinal nerves