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Head and neck anatomy > Submandibular gland > Flashcards

Submandibular gland Flashcards

1
Q

Describe the submandibular gland.

A

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

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2
Q

What is the submandibular gland indented by?

A

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

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3
Q

What does the superficial part of the submandibular gland fill?

A

The superficial part of the submandibular gland fills the digastric triangle

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4
Q

Where does the superficial part extend?

A

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

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5
Q

The superficial part has 3 surfaces, namely :

A

Has inferior, lateral & medial surfaces

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6
Q

What partially encloses the superficial part?

A

Two layers of deep cervical fascia

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7
Q

What does the superficial layer of fascia cover?

A

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

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8
Q

What does the deep layer of fascia cover?

A

Deep layer of fascia covers medial surface of gland& is

attached to mylohyoid line of mandible

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9
Q

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

A 
• Skin
• Platysma
• Cervical branch of 
facial nerve
• Deep fascia
• Facial vein
•Submandibular 
lymph nodes
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10
Q

SUPERFICIAL PART RELATIONS - The lateral surface is related to :

A
  • Submandibular fossa on mandible
  • Insertion of medial pterygoid
  • Facial artery
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11
Q

SUPERFICIAL PART RELATIONS - The medial surface has..

A

3 parts - anterior, middle and posterior

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12
Q

The anterior part is related to :

A

Mylohyoid muscle
nerves
vessels

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13
Q

The middle part is related to :

A 
Hyoglossus
Styloglossus
Lingual nerve
Submandibular ganglion
Hypoglossal nerve
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14
Q

The posterior part is related to :

A

Styloglossus
Stylohyoid ligament
Glossopharyngeal nerve
Wall of pharynx

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15
Q

Describe the deep part of the submandibular gland.

A

The deep part of the submandibular gland is small in size

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16
Q

The deep part lies…

A

deep to the mylohyoid

17
Q

What is the deep part superficial to?

A

The deep part is superficial to the hyoglossus & styloglossus

18
Q

What is the deep part continuous with?

A

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

19
Q

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

A

The facial artery

20
Q

Describe the submandibular duct.

A

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

21
Q

Where does the submandibular duct emerge?

A

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

22
Q

Where does the submandibular duct run?

A

Forward on the hyoglossus between the lingual and hypoglossal nerves

23
Q

Where is the submandibular duct crossed by the lingual nerve?

A

At the anterior border of the hyoglossus

24
Q

Where does the submandibular duct open?

A

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

25
Q

Venous drainage of the submandibular duct :

A

Drains into the common facial or lingual vein

26
Q

Lymphatic drainage of the submandibular duct :

A

Into the submandibular lymph nodes

27
Q

What supplies the submandibular duct?

A

The branches of the submandibular ganglion

28
Q

What do the branches of the submandibular ganglion convey?

A
  • Secretomotor fibres
  • Sensory fibres from lingual nerve
  • Vasomotor sympathetic fibres from plexus on facial artery
29
Q

Secretomotor innervation pathway :

A

*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

30
Q

What type of ganglion is the submandibular ganglion?

A

A parasympathetic peripheral ganglion

31
Q

What does the submandibular ganglion act as?

A

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

32
Q

The submandibular ganglion is topographically…

A

related to the lingual nerve

33
Q

The submandibular ganglion is functionally…

A

connected to the facial nerve(chorda tympani)

34
Q

Where does the submandibular ganglion lie?

A

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

35
Q

The submandibular ganglion is suspended by the…

A

lingual nerve by two roots

Head and neck anatomy (22 decks)

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