Question

The Erector Spinae Muscle group extend the neck and rotate the head.

True

False

Answer 1

True-

Erector Spinae muscle are large, disorganized group of muscles that consists of 3 columns of muscles-(9 Muscles)

1.iliocostalis- Iliocostalis cervicis , Iliocostalis thoracis & Iliocostalis lumborum

2.Longissimus- Longissimus capitis , Longissimus cervicis & Longissimus thoracis

3.Spinalis - Spinalis capitis , Spinalis cervicis & Spinalis thoracis

These Muscles run vertically on either side of the spine from lower back of the skull alongside the lumbar, thoracic,& cervical sections of the spine down to the Pelvis .

Action:

1. Back extension

2. Lateral back flexion

3. Lateral back rotation

*Spinalis capitis , Spinalis cervicis: Extends neck & rotates head

*Spinalis thoracis: Extends vertebral column

* Longissimus Capitis :Rotates head & pulls backward
*Longissimus Cervicis:Longissimus Cervicis

*Longissmus Thoracis: Extension, lateral flexion of vertebral column, rib rotation

*iliocostalis Cervicis: Extends cervical vertebrae

* Iliocostalis Thoracis : Extension, lateral flexion of vertebral column, rib rotation

* Iliocostalis Lumborum : Extension, lateral flexion of vertebral column, rib rotation