Neck: Suprahyoid Muscles

Question 1

Superficial Relations of Anterior belly of digastric

Answer 1

Skin & facia

Question 2

Deep relations of anterior belly of digastric

Answer 2

Mylohyoid Muscle

Question 3

Superficial relations of posterior belly of digastric

Answer 3

2 glands:
* parotid gland
* Submandibular gland

3 Muscles:
* Sternomastoid
* Masseter
* Medial Pterygoid

1 vein:
* Common (anterior) facial Vein

Question 4

Deep relations of posterior belly of digastric

Answer 4

1 Muscle:
* Hyoglossus

3 small arteries (branches of ECA):
* Lingual A
* Facial A
* Occipital A

3 Large vessels:
* ECA
* ICA
* IJV

Last 3 Cranial Nerves:
* 10 (vagus)
* 11 (acessory)
* 12 (hypoglossal)

Question 5

upper border of posterior belly of digastric is related to

Answer 5

• Posterior auricular A
• Stylohyoid Muscle

Question 6

Lower border of posterior belly of digastric is related to

Answer 6

• Occipital A (passing backwards)
• Hypoglossal N (passing forewards)

Question 7

Superficial (lower) relations of Mylohyoid

Answer 7

• Submandibular gland (superficial Part)
• Anterior belly of digastric
• Submental Lymph nodes
• Submental br of Facial A
• Nerve to mylohyoid

Question 8

Deep relations of Mylohyoid muscle

Answer 8

Hyoglossus muscle

Structures Anterior to hyoglossus:
* Sublingual Gland & duct
* 3rd part lingual A
* Geniohyoid
* Genioglossus

Structures Lateral to Hyoglossus:
* Deep part Submandibular gland
* Styloglossus muscle
* Lingual N
* Submandibular ganglion (suspended by lingual N)
* Hypoglossal N and its vena commitants
* Suprahyoid Artery

Question 9

Posterior relation/ structures along Posterior border of Hyoglossus muscle

Answer 9

• 1st part lingual Artery
• Stylohyoid ligmanet
• Stylopharyngeus Muscle
• Middle pharyngeal constictor Muscle
• Glossopharyngeal N

Question 10

Structures medial (deep) to hyoglossus Muscle

Answer 10

• 2nd Part Lingual Artery + its 2 dorsal Lingual A
• Stylohyoid ligmanet
• Stylopharyngeus Muscle
• Middle pharyngeal constictor Muscle
• Genioglossus
• glossopharyngeal N

Question 11

Origin of Geniohyoid

Answer 11

Lower genial tubercle

Question 12

Insertion of geniohyoid

Answer 12

Body of hyoid

Question 13

Nerve supply of geniohyoid

Answer 13

C1 by hypoglossal N

Question 14

Action of geniohyoid

Answer 14

elevation of hyoid bone

Question 15

Origin of digastric muscle

Answer 15

• Anterior belly: Digastric fossa of mandible
• Posterior belly: digastric fossa of Mastoid proccess

Question 16

Insertion of digastric muscle

Answer 16

Intermediate tendon which is connected to hyoid bone by fibrous loop

Question 17

Nerve supply of digastric Muscle

Answer 17

• Anterior belly: nerve to mylohyoid
• Posterior belly: Facial N

Question 18

Action of digastric muscle

Answer 18

• Depression of mandible when hyoid is fixed
• elevation of hyoid during swallowing when mandible is fixed

Question 19

Origin of mylohyoid

Answer 19

Mylohyoid line of mandible

Question 20

Insertion of mylohyoid

Answer 20

body of hyoid bone & mylohyoid raphie (for anterior and middle fibers)

Question 21

Nerve supply of mylohyoid

Answer 21

Nerve to mylohyoid

Question 22

Action of mylohyoid

Answer 22

• Elevation of hyoid bone
• Deperession of mandible when hyoid is fixed