Posterior/Lateral Cervical Triangle Muscles

Question 0

Middle Scalene

Answer 0

Origin: Posterior tubercles of transverse processes of C4-C7 vertebrae

Insertion: 1)Superior surface of the 1st rib and 2)the posterior groove of the subclavian artery

Innervation: Anterior rami of spinal nerves

Question 1

Anterior Scalene

Answer 1

Origin: Anterior tubercles of the transverse processes of C3-C6 vertebrae

Insertion: 1st rib

Innervation: Cervical spinal nerves C4-C6

Question 2

Posterior Scalene

Answer 2

Origin: Posterior tubercles of transverse processes of C4-C6 vertebrae

Insertion: External border of 2nd rib

Innervation: Anterior rami of spinal nerves C7 and C8

Question 3

Omohyoid

Answer 3

Origin: Superior Border of scapula near suprascapular notch

Insertion: Inferior Border of hyoid

Innervation: C1-C3 branch of ansa cervicalis