General Muscles

Question 1

What muscles make up the superficial layer of the back?

Answer 1

.Levator scapulae
.Rhomboid major
.Rhomboid minor
.Latissimus Dorsi
.Trapezius

Question 2

What muscles make up the intermediate compartment of the back?

Answer 2

.Levator costorum
.Serratus posterior superior
.Serratus posterior inferior

Question 3

What are the 4 groups of the Deep muscles of the back?

Answer 3

1.) Splenius group
2.) Erector spinae group
3.) Transversospinales group
4.) Segmental group

Question 4

What muscles make up the splenius group of the back?

Answer 4

1.) splenius cervicis
2.) splenius capitis

Question 5

What muscles make up the erector spinae group?

Answer 5

1.) Iliocostalis lumborum
2.) iliocostalis thoracis
3.) iliocostalis cervicis

4.) longissimis thoracis
5.) longissimis cervicis
6.) longissimis capitis

7.) spinalis cervicis
8.) spinalis capitis

Question 6

What muscles make up the transversospinales group?

Answer 6

1.) rotatores-( longus and brevis)
2.) multifidus
3.) semi spinalis thoracis
4.) semi spinalis cervicis
5.) semi spinalis capitis

Question 7

What muscles are part of the segmental group of the back?

Answer 7

1.) inter spinalis
2.) inter transversarii

Question 8

What Muscles attach at the common origin?

Answer 8

1.) iliocostalis lumborum
2.) longissimis thoracis
3.) spinalis thoracis

Question 9

What muscles have an origin on the Ligamentum nuchae?

Answer 9

1.) trapezius
2.) Serratus posterior superior
3.) splenius capitis
4.) splenius cervicis

Question 10

What muscles have an origin or insertion on the superior nuchal line?

Answer 10

1.) trapezius (origin)
2.) splenius capitis (insertion)

Question 11

What muscles have an instertion on either the mastoid process or occipital bone?

Answer 11

1.) splenius capitis (inserts on mastoid process)
2.) longissimis capitis (inserts on mastoid process)
3.) semi spinalis capitis (inserts on occipital)

Question 12

What muscles originate on a rib?

Answer 12

1.) iliocostalis thoracis ( originates and inserts onto ribs)
2.) iliocostalis cervicis

Question 13

What muscles insert onto ribs?

Answer 13

1.) Serratus posterior superior
2.) Serratus posterior inferior
3.) levator costorum

4.) iliocostalis lumborum
5.) iliocostalis thoracis ( originates and inserts)

6.) longissimis thoracis

Question 14

What are the only 2 muscles that originate off a rib/s?

Answer 14

1.) iliocostalis thoracis
2.) iliocostalis cervicis

Question 15

What muscles have an origin with no TVP or SP?

Answer 15

1.) iliocostalis thoracis
2.) iliocostalis cervicis

Question 16

What muscles have an insertion with no TVP or SP?

Answer 16

Intermediate group:
Serratus superior
Serratus inferior
levator costorum

Deep group:
Splenius capitis

  Iliocostalis lumborum
  Iliocostalis thoracis

  Longissimis capitis

  Semispinalis capitis

Question 17

What is the only muscle has multiple insertion points of the intermediate/deep back?

Answer 17

Splenius capitis (inserts on mastoid process and superior nuchal line)

Question 18

What 9 muscles have multiple origin attachments?

Answer 18

Intermediate group:
Serratus posterior superior ( SP of C7-T2 & Ligamentum nuchae)

Deep group:

   Splenius capitis (SP of C7-T3 & Ligamentum nuchae)

   Iliocostalis lumborum (common origin)
   Iliocostalis thoracis (common origin)
   Iliocostalis capitis ( articular process of C4-C7 & TVP T1-T5)

   Spinalis thoracis (common origin)
   Spinalis cervicis (SP C7-T2 & Ligamentum nuchae)

   Semispinalis capitis (articular process of C6-C4 & TVP T6-C7)
   Multifidus

Question 19

What do Serratus superior, splenius capitis and spinalis cervicis have in common?

Answer 19

They all originate off of SP’s + Ligamentum nuchae

Question 20

What do longissimis capitis and Semispinalis capitis have in common?

Answer 20

They both have origins off articular processes and TVP’s

Question 21

What do iliocostalis lumborum, longissimis thoracis and spinalis thoracis have in common?

Answer 21

Common origin ( PSIS, posterior iliac crest, sacrum and SP’s T11-L5)

Question 22

What are the landmarks of the “ common origin”?

Answer 22

Posterior iliac crest
PSIS
Sacrum
SP’s T11-L5

Question 23

What are the only 4 muscles that insert onto TVPS?

Answer 23

1.) splenius cervicis
2.) iliocostalis cervicis
3.) longissimis cervicis
4.) intertransversarii

Question 24

What are the majority of the muscles of the intermediate/deep back innervated by?

Answer 24

Dorsal rami of spinal nerves

Question 25

What are the only 3 muscles innervated by ventral rami of spinal nerves?

Answer 25

1.) Serratus posterior superior
2. Serratus posterior inferior
3.) Intertransversarii ( dorsal and ventral innervations)

Question 26

What are the only muscles that have specific rami innervations?

Answer 26

Muscles of the intermediate group:

Serratus posterior superior = ventral rami T1-T4
Serratus posterior inferior= ventral rami T9-T12
Levator costorum= Dorsal rami of C8-T11

Question 27

What are the 3 categories within the erector spinae group?

Answer 27

1.) iliocostalis
2.) longissimis
3.) spinalis