Lecture 20: Mm of Ant. Neck ORIGINS

Question 1

What is the origin of SCM (Sternocleidomastoid)?

Answer 1

Sternal head: Anterior surface of manubrium
Clavicular head: Medial 1/3 of the clavicle (superior surface)

Question 2

What is the origin of Mylohyoid?

Answer 2

Mylohyoid line of the body of the mandible
Inner surface of the mandible

Question 3

What is the origin of Digastric?

Answer 3

Anterior belly: Inner surface of body of mandible (digastric fossa)
Post. belly: Mastoid process of temporal bone (inner surface)

Question 4

What is the origin of Geniohyoid?

Answer 4

Inferior mental spine of the mandible (genial tubercles)
Inner surface of the mandible

Question 5

What is the origin of Stylohyoid?

Answer 5

Styloid process of the temporal bone

Question 6

What is the origin of Thyrohyoid?

Answer 6

Oblique line of the thyroid cartilage

Question 7

What is the origin of Omohyoid?

Answer 7

Upper border of the scapula
Suprascapular ligament
Attached to the 1st rib by a sling of cervical fascia
*Note ligamentous origin

Question 8

What is the origin of Sternohyoid?

Answer 8

Medial end of clavicle and manubrium of sternum
Origin on posterior aspect of sternum and clavicle

Question 9

What is the origin of Sternothyroid?

Answer 9

Manubrium of sternum (posterior surface)

Question 10

What is the origin of Anterior Scalene?

Answer 10

Anterior tubercles of TVPs of C3-C6

Question 11

What is the origin of Middle Scalene?

Answer 11

Posterior tubercles of TVPs of C2-C7

Question 12

What is the origin of Posterior Scalene?

Answer 12

Posterior tubercles of TVPs of C4-C6

Question 13

What is the origin of Longus Capitis?

Answer 13

Anterior tubercles of the TVPs of C3-C6
(medial to ant. scalene origin)

Question 14

What is the origin of Longus Colli?

Answer 14

Inferior Oblique:
Anterior surface of the bodies of T1-T3

Superior Oblique:
Anterior tubercles of TVPs of C3-C5

Vertical Segment:
anterior surface of bodies C5-T3 (medial portion of mm)