Deep Back Muscles

Question 1

Muscles in the intermediate group of the back?

Answer 1

Serratus Posterior Superior

Serratus Posterior Inferior

Question 2

General function of Intermediate back muscles

Answer 2

Weak, accessory muscles for respiration

Question 3

Origin of Serratus Posterior Superior

Answer 3

Ligamentum Nuchae

Spinous Processes C7-T3

Question 4

Insertion of Serratus Posterior Superior

Answer 4

Ribs 2-5

Question 5

Innervation of Serratus Posterior Superior

Answer 5

Anterior Rami of thoracic nerves T2-T5

Question 6

Function of Serratus Posterior Superior

Answer 6

Elevates ribs 2-5

Question 7

Origin of Serratus Posterior Inferior

Answer 7

Spinous Processes T11 to L3

Question 8

Insertion of Serratus Posterior Inferior

Answer 8

Ribs 9-12

Question 9

Innervation of Serratus Posterior Inferior

Answer 9

Anterior Rami of thoracic nerves T9-T12

Question 10

Function of Serratus Posterior Inferior

Answer 10

Depresses ribs 9-12

Question 11

General functions of intrinsic back muscles

Answer 11

Extension and rotation of vertebral column and neck

Question 12

Innervation of Deep/Intrinsic Back Muscles

Answer 12

Posterior Rami of Spinal Nerves

Question 13

Most superficial muscles in Intrinsic layer (Spinotransversales group)

Answer 13

Splenius Capitiis

Splenius Cervicis

Question 14

Origin of Splenius Capitis

Answer 14

Mastoid Process

Lateral Superior Nuchal Line

Question 15

Insertion of Splenius Capitis

Answer 15

Ligamentum Nuchae

Spinous Processes C7-T4

Question 16

Origin of Splenius Cervicis

Answer 16

Transverse Processes C1-C3

Question 17

Insertion of Splenius Cervicis

Answer 17

Spinous Processes T3-T6

Question 18

Functions of spinotransversales group

Answer 18

Extension of neck (acting together)

Rotation of neck (unilateral contraction)

Question 19

Muscles in Erector Spinae/ Intermediate intrinsic muscles group

Answer 19

Spinalis (most medial)
Longissimus
Iliocostalis (most lateral)

Question 20

Function of Erector Spinae muscles

Answer 20

Primary extensors of the Vertebral Column

Question 21

Muscles in Transversospinales/ Deep Intrinsic muscles muscles group

Answer 21

Semispinalis
Multifidis (long and fat)
Rotares (long and thin)

Question 22

General origins/insertions of Transversospinales muscles

Answer 22

Spinous- Transverse processes of vertebrae

Question 23

Function of Transversospinales muscles

Answer 23

Extension and rotation of Vertebral Column