Muscles of the Spine : Transverospinales Group

Question 1

What are the muscles of the Transversospinales Group?

Answer 1

1. Semispinalis
2. Multifidus
3. Rotatores

Question 2

Semispinalis

Answer 2

O : TVP of C7-T10 and articular processes of C4-C6
I : SP of C2-T4 and the occipital bone
A :
1. Extends the trunk, neck and head at the spinal joints
2. Contralaterally rotates the trunk and neck at the spinal joints

Question 3

Semispinalis Capitis

Answer 3

O : TVPs of C7-T6 and articular tubercles of C4-C6
I : Occipital bone between the superior and inferior nuchal lines
A :
1. Extends the trunk, neck and head at the spinal joints
2. Contralaterally rotates the trunk and neck at the spinal joints

Question 4

Multifidus

Answer 4

O : Posterior sacrum, posterior superior iliac spine, posterior sacroiliac ligament and L5-C4
I : SP of vertebrae 3-4 segmental levels superior to the inferior attachment
A :
1. Extends the trunk and neck at the spinal joints
2. Laterally flexes and contralaterally rotates the trunk and neck at the spinal joints

Question 5

Rotatores

Answer 5

O : TVP inferiorly
I : Lamina superior, spanning 1-2 segmental levels superior to the inferior attachment
A :
1. Extends the trunk and neck at the spinal joints
2. Laterally rotates the trunk and neck at the spinal joints
3. Contralaterally rotates the trunk and neck at the spinal joints