Salivary Glands & Submandibular Region

Question 1

where is submandibular gland in respect to mylohyoid

Answer 1

partly superficial and partly deep to mylohyoid i.e. wraps around the muscle

Question 2

submandibular secretions

Answer 2

mixed serous and mucous secretions

Question 3

arterial supply of submandibular glands

Answer 3

submental arteries

Question 4

venous drainage of submandibular glands

Answer 4

submental veins

Question 5

lymphatic vessels of submandibular gland

Answer 5

end in deep cervical lymph nodes esp the jugulo-omohyoid node

Question 6

submandibular gland fascial capsule is

Answer 6

continuous with deep investing cervical fascia

Question 7

where do submandibular ducts open in the oral cavity

Answer 7

into 3 orifices beside the base of the frenulum called sublingual caruncles

Question 8

secretions of sublingual gland

Answer 8

mostly mucous with some serous

Question 9

location of sublingual gland

Answer 9

floor of mouth between mandible and hyoglossus, lateral to submandibular duct and lingual nerve

Question 10

arterial supply of sublingual glands

Answer 10

sublingual and submental arteries, branches of the lingual and facial arteries respectively

Question 11

what lays over sublingual glands

Answer 11

sublingual folds that extend to the frenulum of the tongue

Question 12

drainage of sublingual glands

Answer 12

ducts drain via openings into crest of sublingual fold but can sometimes empty with submandibular gland

Question 13

aim of parasympathetic innervation

Answer 13

to produce saliva

Question 14

parasympathetic preganglionic path

Answer 14

travel to submandibular ganglion from chorda tympani (CN VII nervus intermedius) & via lingual nerve (CN V3)

Question 15

parasympathetic postganglionic path

Answer 15

travel in lingual nerve to sublingual gland OR travel directly to sublingual & submandibular glands not in a nerve

Question 16

name 4 minor salivary glands in submucosa of oral cavity

Answer 16

1. buccal
2. palatine
3. lingual
4. labial

Question 17

innervation of minor salivary glands

Answer 17

CN VII // CN V

Question 18

minor salivary glands are susceptible to

Answer 18

mucoceles i.e. swelling due to blockage of associated ducts

Question 19

glands above level of oral fissure are innervated by

Answer 19

greater petrosal nerve of CN VII

Question 20

glands below level of oral fissure are innervated by

Answer 20

chorda tympani of CN VII

Question 21

3 main pathologies of salivary glands / ducts

Answer 21

1. mumps
2. salivary stones / calculi (sialothiasis)
3. excessive salivation - ptyalism

Question 22

salivary stones most common in which duct

Answer 22

submandibular duct due to upwards course into oral cavity

Question 23

suprahyoid muscles connect to

Answer 23

skull or mandible

Question 24

name the 4 suprahyoid muscles

Answer 24

1. mylohyoid
2. digastric
3. stylohyoid
4. geniohyoid

Question 25

infrahyoid muscles connect to

Answer 25

inferior structures i.e. sternum, scapula, thyroid cartilage

Question 26

name the 4 infrahyoid muscles

Answer 26

1. sternothyroid
2. sternohyoid
3. thyrohyoid
4. omohyoid

Question 27

origin and insertion of mylohyoid

Answer 27

origin - mylohyoid line on mandible
insertion - body of hyoid

Question 28

action of mylohyoid

Answer 28

elevates hyoid and floor of mouth

Question 29

innervation of mylohyoid

Answer 29

CN V3 via inferior alveolar branch the nerve to mylohyoid

Question 30

origin of anterior & posterior belly of digastric

Answer 30

anterior belly - digastric fossa on lower medial aspect of mandible
posterior belly - mastoid notch on medial side of mastoid process

Question 31

insertion of anterior & posterior belly of digastric

Answer 31

both insert at attachment of their intermediate tendon at hyoid bone

Question 32

anterior belly of digastric function

Answer 32

elevates hyoid & opens mouth by lowering mandible

Question 33

posterior belly of digastric function

Answer 33

elevates & retracts hyoid bone

Question 34

innervation of digastric

Answer 34

anterior belly - nerve to mylohyoid CN V3
posterior belly - digastric branch of CN VII