Floor of Posterior Cervical Triangle

Question 1

Name the five muscles of the Posterior Cervical Triangle Floor

Answer 1

1. ) Posterior Scalene
2. ) Middle Scalene
3. ) Anterior Scalene
4. ) Splenius Capitis
5. ) Levator Scapulae

Question 2

O of Posterior Scalene

Answer 2

Posterior tubercles of transverse tubercles C4-C6

Question 3

I of Posterior Scalene

Answer 3

External borders of 2nd rib

Question 4

Action of Posterior Scalene

Answer 4

1. ) Laterally Flexes the neck

2. ) Elevates 2nd rib during forced inhalation

Question 5

Innervation of Posterior Scalene

Answer 5

Ventral Rami of Cervical Spinal Nerve C7-C8

Question 6

O of Middle Scalene

Answer 6

Posterior tubercles of transverse processes C2-C7

Question 7

I of Middle Scalene

Answer 7

Superior Border of 1st rib (posterior to subclavian artery)

Question 8

Action of Middle Scalene

Answer 8

1. ) Laterally Flexes the neck

2. ) Elevates 1st rib during forced inspiration

Question 9

Innervation of Middle Scalene

Answer 9

Ventral rami of Cervical Spinal Nerve C3-C8

Question 10

O of Anterior Scalene

Answer 10

Anterior tubercles of transverse processes C3-C6

Question 11

I of Anterior Scalene

Answer 11

Scalene tubercle of inner border of 1st rib (anterior to subclavian artery)

Question 12

Innervation of Anterior Scalene

Answer 12

Ventral Rami of Cervical Spinal Nerve C4-C6

Question 13

O of Splenius Capitis

Answer 13

1. ) Spinous Processes of T1-T6

2. ) Inferior 1/2 of Ligamentum Nuchae

Question 14

I of Splenius Capitis

Answer 14

1. ) Lateral aspect of mastoid process

2. ) Lateral 1/3 of Superior Nuchal Line

Question 15

Action of Splenius Capitis

Answer 15

1. ) Laterally flexes the neck
2. ) Rotation of neck to the same side
3. ) Bilaterally - extends neck

Question 16

Innervation of Splenius Capitis

Answer 16

Dorsal Rami of Middle Cervical Spinal Nerve

Question 17

O of Levator Scapulae

Answer 17

Posterior tubercles of transverse processes C1-C4

Question 18

I of Levator Scapulae

Answer 18

Superior part of medial border of scapula

Question 19

Action of Levator Scapulae

Answer 19

1. ) Elevates scapula

2. ) Inferiorly rotates scapula

Question 20

Innervation of Levator Scapulae

Answer 20

1. ) Dorsal Scapular Nerve C5

2. ) Cervical Spinal Nerve C3, C4

Question 21

Common action amongst all muscles of the floor of the posterior cervical triangle

Answer 21

Lateral flexion of the neck

Question 22

Origin is Posterior tubercles of C4-C6

Answer 22

Posterior Scalene

Question 23

Origin is Posterior tubercles of C2-C7

Answer 23

Middle Scalene

Question 24

Ventral Rami of Cervical Spinal Nerve C3-C8

Answer 24

Middle Scalene

Question 25

Ventral Rami of Cervical Spinal Nerve C7, C8

Answer 25

Posterior Scalene

Question 26

Ventral Rami of Cervical Spine C4-C6

Answer 26

Anterior Scalene