Ch 7 Musculature of the Back

Question 1

Bones involved in back muscle attachment

Answer 1

Occipital bone of the skull
Vertebrae (cervical, thoracic, lumbar) 
Sacrum
Hip Bone (iliac crest) 
Clavical 
Scapula
Humerous

Question 2

Single posterior projection from the junction of the two laminae

Answer 2

Spinous process

Question 3

Lateral projection from the junction of a pedicle and a lamina (paired)

Answer 3

Transverse process

Question 4

Acromion

Answer 4

Ledge that overlies the shoulder joint

Question 5

Scapular spine

Answer 5

Prominent ridge continuous laterally with the acromion. It’s posterior surface is the crest, the edges of which are upper and lower lip.

Question 6

Medial border of the scapular spine is _____

Answer 6

parallel with the vertebral column

Question 7

Between the greater tubercle and the lesser tubercle in the humerous

Answer 7

Intertubecular groove

Question 8

Origin of Trapezius

Answer 8

Occipital bone
Spinous process of ALL cervical vertebrae via ligaments nuchae
Spinous processes of ALL thoracic vertebrae

Question 9

Insertion of Trapezius

Answer 9

Lateral third of the clavicle
Crest of the scapula
Acromion
(SAC)

Question 10

Action of the Trapezius

Answer 10

Upward rotation of the scapula in which the inferior angle moves laterally
Elevation of scapula
Depression of scapua

Question 11

Innervation of Trapezius

Answer 11

CN XI, accessory nerve

Ventral rami of CV3 and CV4

Question 12

Origin of Latissimus Dorsi

Answer 12

Lower 3 or 4 ribs
Spinous processes of lower 6 thoracic vertebrae
Spinous processes of lumbar and sacral vertebrae via aponeurosis
Iliac crest

Question 13

Insertion of Latissimus Dorsi

Answer 13

Intertubercular groove or sulcus of humorous

Question 14

Action of Latissimus Dorsi

Answer 14

Adduction of arm at shoulder joint
Extension of arm at shoulder joint
Medial Rotation of arm at shoulder joint

Question 15

Innervation of latissimus dorsi

Answer 15

Thoracodorsal nerve

Question 16

Origin of Levator Scapulae

Answer 16

Transverse processes of CV1-CV4

Question 17

Insertion of Levator Scapulae

Answer 17

The medial border of the scapula superior to the scapular spine

Question 18

Action of Levator Scapulae

Answer 18

Elevation of the scapula

Question 19

Innervation of levator scapula

Answer 19

Ventral rami C3 and C4

Question 20

Origin of Rhomboid Minor

Answer 20

Spinous process of CV7 and TV1

Question 21

Insertion of Rhomboid Minor

Answer 21

The medial border of the scapula at the scapular spine

Question 22

Innervation of Rhomboid Minor

Answer 22

Dorsal Scapular Nerve

Question 23

Action of Rhomboid Minor

Answer 23

Adduction of scapula

Question 24

Origin of Rhomboid Major

Answer 24

Spinous processes of T2 - T5

Class from 2-5!

Question 25

Insertion of Rhomboid Major

Answer 25

The medial border of the scapula inferior to the scapular spine

Question 26

Action of Rhomboid Major

Answer 26

Adduction of scapula

Question 27

Innervation of Rhomboid Major

Answer 27

Dorsal Scapular Nerve

Question 28

Erector spinae

Answer 28

Consists of 3 longitudinally coursing muscles and constitutes the largest muscular mass of the back. Above the 12th Rib

Question 29

Erector spinal consists of the following columns of muscle from medial to lateral:

Answer 29

Spinalis Longissimus Iliocostalis

Question 30

Centimeter wide muscle along the spinous process

Answer 30

Spinalis

Question 31

The intermediate muscle of Erector Spinal, extending all the way to the skull; it is the longest column

Answer 31

Longissimus

Question 32

The most lateral muscle of the erector spinal, extending from the ilium to the ribs.

Answer 32

Iliocostalis

Question 33

The most important postural muscle that holds the spine erect by extending the vertebral column

Answer 33

Erector spinae

Question 34

Innervation of erector spinae

Answer 34

Segmental from dorsal rami

Question 35

Deep back muscle located in the neck

Answer 35

Splenius

Question 36

2 parts of the spenius

Answer 36

Splenius Capitis Splenius Cervicis -- Continuous at their origin, separable only at their insertion.

Question 37

Splenius capitis

Answer 37

Extends from Ligamentum Nuchae and C7-T4 to the skull

Question 38

Splenius Cervicis

Answer 38

Inferior portion of Splenius, courses from TV3-TV6 upward to CV1-CV3

Question 39

When one side of the splenius acts, the head and cervical column ________

Answer 39

Rotate toward the same side

Question 40

When both sides of the splenius act together the head and cervical column _____

Answer 40

Extend

Question 41

Transversospinal group

Answer 41

Semispinalis Multifidus Rotatores (See me roar)

Question 42

Generally all muscles of transversospinal group originate from the ___ and insert into the ___ of certain vertebrae above it

Answer 42

Transverse process; spinous process

Question 43

Deep back muscle that occupies upper half of the vertebral column

Answer 43

Semispinalis

Question 44

How many vertebral segments does semispinalis course?

Answer 44

4-6

Question 45

3 regional parts of Semispinalis

Answer 45

Semispinalis Capitis (biventer services) Semispinalis Cervicis Semispinalis Thoracis

Question 46

Another name for semispinalis capitis is ____ because of ___

Answer 46

Biventer services, prominent intervening tendon

Question 47

Semispinalis crevices is ___ to semispinalis capitis. Semispinalis thoracic is ____ to skkmispinaliscapitis in the thoracic region.

Answer 47

Deep, Inferior

Question 48

Action of semispinalis capitis

Answer 48

Extends the head and rotates toward same side

Question 49

Actions of semispinalis crevices and thoracis

Answer 49

Rotate vertebrae toward the opposite side

Question 50

Deep back muscles that are best developed in the lumbar region deep to the erector spinae

Answer 50

Multifidi

Question 51

How many vertebral segments does multifidus segment?

Answer 51

2-4

Question 52

Where is multifidus best developed?

Answer 52

Lumbar region deep to erector spinae

Question 53

Action of Multifidus

Answer 53

Rotates vertebral column toward opposite side

Question 54

Innervation of Multifidus

Answer 54

Segmental from dorsal rami

Question 55

Deep back muscles that are best developed in the thoracic region deep to semispinalis thoracic.

Answer 55

Rotatores

Question 56

Deepest back muscles that lie directly on the laminae in the groove between the spines and transverse processes.

Answer 56

Rotatores

Question 57

Rotatores longus

Answer 57

Rotatores muscle that crosses two vertebrae

Question 58

Rotatores Brevis

Answer 58

Rotatores muscle that crosses one (the next) vertebrae

Question 59

Action of rotators muscles

Answer 59

Rotate vertebral column toward opposite side

Question 60

Innervation of rotators muscles

Answer 60

segmental from dorsal rami

Question 61

Suboccipital muscles

Answer 61

``` 4 muscles lying in the deep neck - Rectus Capitis Posterior Major - Rectus Capitis posterior minor Obliquus captifs iferior Obliquus captifs superior ```

Question 62

Suboccipital triangle

Answer 62

Rectus capitis posterior major Obliquus capitis inferior obliques capitis superior

Question 63

Which sub occipital muscle is not involved in the sub occipital triangle?

Answer 63

Rectus wapitis posterior minor