Longissimus (Capitis, Cervicis & Thoracis)

This information has been displayed with the kind permission of  Get Body Smart who can be found at the links below:

Longissimus Captis

Origin: Transverse processes of T1-5. Articular processes of C5-7

Insertion: Posterior mastoid process of temporal bone.

Actions: When working bilaterally extends spine. When working independently laterally flexes vertebral column.

Innervation:Dorsal rami of spinal nerves.

Daily uses: Maintains upper back posture in sitting and standing.

Back to muscles

Longissimus Cervicis

Origin: Transverse processes of T1-5. 

Insertion: Transverse processes of C2-6.

Actions: When working bilaterally extends spine. When working independently laterally flexes vertebral column.

Innervation: Dorsal rami of spinal nerves.

Daily uses: Maintains posture in sitting and standing.

Back to muscles

Longissimus Thoracis

Origin: Lateral and medial sacral crests. L1-5 and T11-12 spinous processes and supraspinal ligament. Medial part of iliac crest.

Insertion: Transverse processes of T1-12. Area between tubercles and angles of lower nine or ten ribs.

Actions: When working bilaterally extends spine. When working independently laterally flexes vertebral column.

Innervation: Dorsal rami of spinal nerves.

Daily uses: Maintains posture in sitting and standing.

Other muscles …

Supraspinatus

Origin: Supraspinous fossa

Insertion: Greater tuberosity of the humerus

Actions: Abduction 
Stabilisation of the humerus

Innervation: Suprascapular nerve

Daily uses: Holding shopping bags away from the body

 

Teres Minor

Origin: Mid section of the lateral border of the scapula

Insertion: Greater tuberosity on the humerus

Actions:External rotation, 
Shoulder adduction

Innervation: Axillary nerve

Daily uses: Brushing hair

Subscapularis

Origin: Anterior (costal) surface of the scapula

Insertion: Lesser tuberosity of the humerus

Actions: Internal rotation
, Adduction

Innervation: Upper and lower subscapular nerves

Daily uses: Tucking the back of your shirt into your trousers

More Anatomy

Back to muscles

Ligaments

Check out strengthening exercises for the rotator cuff

 

 

Share Button

Why not check out...

Close
Please support the site
By clicking any of these buttons you help our site to get better