Segmental Muscles

Question 1

Interspinales

Answer 1

O: spinous processes of vertebrae (absent in thoracic region)

I: spinous processes of vertebrae (span between adjacent vertebrae)

A: extension of vertebral column

In: dorsal rami of cervical nerves

Question 2

Intertransversarii

Answer 2

O: transverse processes of vertebrae (absent in thoracic region)

I: transverse processes of vertebrae (span between adjacent vertebrae)

A: lateral flexion of vertebral column

In: dorsal and ventral rami of cervical nerves