Submandibular gland

Question 1

Describe the submandibular gland.

Answer 1

The submandibular gland is a large salivary gland, situated in anterior part of digastric
triangle and is roughly J shaped

Question 2

What is the submandibular gland indented by?

Answer 2

Indented by posterior border of mylohyoid which divides it into
a larger part superficial to the muscle & smaller part lying deep
to the muscle

Question 3

What does the superficial part of the submandibular gland fill?

Answer 3

The superficial part of the submandibular gland fills the digastric triangle

Question 4

Where does the superficial part extend?

Answer 4

The superficial part extends upward deep to mandible up to mylohyoid line

Question 5

The superficial part has 3 surfaces, namely :

Answer 5

Has inferior, lateral & medial surfaces

Question 6

What partially encloses the superficial part?

Answer 6

Two layers of deep cervical fascia

Question 7

What does the superficial layer of fascia cover?

Answer 7

Superficial layer of fascia covers inferior surface of gland & is
attached to base of mandible

Question 8

What does the deep layer of fascia cover?

Answer 8

Deep layer of fascia covers medial surface of gland& is

attached to mylohyoid line of mandible

Question 9

SUPERFICIAL PART RELATIONS : What is the inferior surface covered by?

Answer 9

• Skin
• Platysma
• Cervical branch of 
facial nerve
• Deep fascia
• Facial vein
•Submandibular 
lymph nodes

Question 10

SUPERFICIAL PART RELATIONS - The lateral surface is related to :

Answer 10

• Submandibular fossa on mandible
• Insertion of medial pterygoid
• Facial artery

Question 11

SUPERFICIAL PART RELATIONS - The medial surface has..

Answer 11

3 parts - anterior, middle and posterior

Question 12

The anterior part is related to :

Answer 12

Mylohyoid muscle
nerves
vessels

Question 13

The middle part is related to :

Answer 13

Hyoglossus
Styloglossus
Lingual nerve
Submandibular ganglion
Hypoglossal nerve

Question 14

The posterior part is related to :

Answer 14

Styloglossus
Stylohyoid ligament
Glossopharyngeal nerve
Wall of pharynx

Question 15

Describe the deep part of the submandibular gland.

Answer 15

The deep part of the submandibular gland is small in size

Question 16

The deep part lies…

Answer 16

deep to the mylohyoid

Question 17

What is the deep part superficial to?

Answer 17

The deep part is superficial to the hyoglossus & styloglossus

Question 18

What is the deep part continuous with?

Answer 18

The deep part is continuous with the superficial part around posterior border of
mylohyoid

Question 19

Which artery is responsible for supplying the submandibular gland with blood?

Answer 19

The facial artery

Question 20

Describe the submandibular duct.

Answer 20

The submandibular duct is thin walled and it is about 5cm long

Question 21

Where does the submandibular duct emerge?

Answer 21

At the anterior end of the deep part of the submandibular gland

Question 22

Where does the submandibular duct run?

Answer 22

Forward on the hyoglossus between the lingual and hypoglossal nerves

Question 23

Where is the submandibular duct crossed by the lingual nerve?

Answer 23

At the anterior border of the hyoglossus

Question 24

Where does the submandibular duct open?

Answer 24

On the floor of the mouth, on summit of the sublingual papilla at the side of the frenulum of the tongue

Question 25

Venous drainage of the submandibular duct :

Answer 25

Drains into the common facial or lingual vein

Question 26

Lymphatic drainage of the submandibular duct :

Answer 26

Into the submandibular lymph nodes

Question 27

What supplies the submandibular duct?

Answer 27

The branches of the submandibular ganglion

Question 28

What do the branches of the submandibular ganglion convey?

Answer 28

* Secretomotor fibres * Sensory fibres from lingual nerve * Vasomotor sympathetic fibres from plexus on facial artery

Question 29

Secretomotor innervation pathway :

Answer 29

*Starts at the superior salivatory nucleus * The preganglionic fibres pass through the sensory root of the facial nerve ; through the geniculate ganglion; the geniculate ganglion is suspended by the facial nerve; pass through the facial nerve; branch of the facial nerve is the chorda tympani; from the chorda tympani; run in the lingual nerve; into the submandibular ganglion; synapse occurs; then postganglionic fibres emanate from the submandibular ganglion and enter the submandibular gland

Question 30

What type of ganglion is the submandibular ganglion?

Answer 30

A parasympathetic peripheral ganglion

Question 31

What does the submandibular ganglion act as?

Answer 31

A relay station for the secretomotor fibres to the submandibular and sublingual salivary glands

Question 32

The submandibular ganglion is topographically...

Answer 32

related to the lingual nerve

Question 33

The submandibular ganglion is functionally...

Answer 33

connected to the facial nerve(chorda tympani)

Question 34

Where does the submandibular ganglion lie?

Answer 34

The submandibular ganglion lies on hyoglossus muscle just above deep part of submandibular gland

Question 35

The submandibular ganglion is suspended by the...

Answer 35

lingual nerve by two roots