1. SUBMANDIBULAR GLAND
-Vanishri S. Nayak

2. Mixed gland with predominantly serous type
10-20 gm
Situated in Digastric triangle
J-shaped
Superficial & deep part-Mylohyoid

3. Submandibular gland:
Location: occupies most of the posterior part of the submandibular triangle.
Location of parts:
Superficial: larger and lies on the mylohyoid muscle directly underneath the superficial layer of cervical fascia.
Deep: folds around the posterior border of the mylohyoid muscle to lie deep in the sublingual space between the mylohyoid muscle and the hyoglossus and genioglossus muscles.

4. Superficial part 2 ends & 3 surfaces
Anterior end-Anterior belly of Digastric
Posterior end-Stylomandibular ligament

5. Submandibular gland:Relations
Inferior Surface:
Platysma
Cervical branch of facial nerve
Deep fascia
Facial vein
Submandibular lymph nodes

6. Submandibular gland:Relations
Lateral Surface:
Submandibular fossa of mandible
Insertion of medial pterygoid
Facial artery

7. Submandibular gland:Relations
Medial Surface:Anterior part
Mylohyoid, nerve & vessels
Medial Surface:Middle part
Hyoglossus
Styloglossus
Lingual nerve
Submandibular ganglion
Hypoglossal nerve
Medial Surface:Posterior part
Stylohyoid ligament
Glossopharyngeal nerve
Wall of pharynx
Stylohyoid
Posterior belly of digastric

8. Deep part Lateral-Mylohyoid Medial-Hyoglossus
Above-lingual n. & submandibular ganglion
Below-Hypoglossal n.

9. submandibular duct Length:5 cm
Beginning: from the deep part of this gland
Course & Termination:passes forward and medialward to open in the sublingual caruncle at the side of the lingual frenulum.

10. Submandibular gland Arterial Supply:facial artery
Venous drainage: facial vein
Lymphatic drainage: submandibular lymph nodes.

11. Submandibular gland:Nerve Supply
Innervation of submandibular gland:
Sympathetic nerves from the superior cervical sympathetic ganglion reach the submandibular gland via the facial plexus along the facial artery.
Parasympathetic innervation comes from the chorda tympani branch of the facial nerve (VII). The chorda tympani gives rise to the submandibular ganglion, and the gland is innervated by postganglionic parasympathetic fibers from this ganglion.

12. figure 2 - stone formation in submandibular region (stone circled in red)

13. Submandibular ganglion: Situation
On upper part of hyoglossus muscle

14. Submandibular ganglion: Situation
On upper part of hyoglossus muscle above deep part of submandibular gland

15. Submandibular ganglion: Situation
On upper part of hyoglossus muscle above deep part of submandibular gland between lingual nerve & submandibular duct. Suspended from lingual nerve by 2 short branches

18. Submandibular ganglion : Branches & Supply
Parasympathetic fibres:
To submandibular gland: through 5 or 6 branches from ganglion
To sublingual & anterior lingual gland: re-enter lingual nerve through anterior root & travel distal part of lingual nerve
Sympathetic fibres: vasomotor fibres to submandibular & sublingual nerve

19. THANK U