5. Anterior belly of
digastric m.
Myelohyoid
nerveSubmental
artery
Myelohyoid m.
Dr. Sherif Fahmy
Posterior belly of
digastric m.
Stylohyoid m.
Hyoglossus m.
Dr.Sherif Fahmy
6. Myelohyoid m.
Lingual n.
Submandibular
ganglion
Deep part of
submandibular
gland Hypoglossal
nerve
Posterior belly
of digastric m.
Submandibular
duct
Dr. Sherif Fahmy
Myelohyoid n
Submental vs
Anterior belly
of digastric m
Hyoglossus m.
15. Anterior belly of
digastric m.
Myelohyoid
nerveSubmental
artery
Myelohyoid m.
Deep Relations of Anterior belly Digastric Muscle
Dr. Sherif FahmyDr.Sherif Fahmy
17. Superficial part of
submandibular
gland
Posterior belly
of digastric m.
Parotid gland
Superficial Relations of Posterior Belly Digastric muscle
Mastoid process
Angle of mandible
Dr. Sherif Fahmy
Dr.Sherif Fahmy
18. Posterior belly of digastric
m.
Internal carotid
art.
External
carotid art.
Facial art.
Occipita
l art.
I.J.V.
Hypoglossal n.
Vagus n.
Spinal accessory n.
Deep relations of posterior belly of
digastric m.
Dr. Sherif Fahmy
Dr.Sherif Fahmy
25. Anterior belly of
digastric m.
Myelohyoid
m.
myelohyoid
nerve
Submental
artery
Beginning of
anterior jugular vein
Superficial Submental lymph nodes
Dr. Sherif FahmyDr.Sherif Fahmy
29. Anterior belly of
digastric m.
Myelohyoid
m.
Submental
artery
Beginning of
anterior jugular vein
Body of hyoid bone
Submental
lymph nodes
Dr. Sherif Fahmy
33. Myelohyoid m.
Lingual n.
Submandibular
ganglion
Deep part of
submandibular
gland Hypoglossal
nerve
Posterior belly
of digastric m.
Superficial Relations
of Hyoglossus Muscle
Submandibular
duct
Dr. Sherif Fahmy
35. Styloid process
Stylohyoid ligamnent
Glossopharyngeal n.
Middle
constrictor m.
First part of
lingual artery
3rd
part of
lingual artery
Geniohyoid
m.
Genioglossus m.
Deep, anterior and posterior
relations
Sublingual gl.
Dr. Sherif Fahmy
43. Parts, site and extensions
• Parts: superficial & deep to myelohyoid
muscle.
• Site: Upper part is deep to mandible
(submandibular fossa) while the lower part in
digastric triangle.
• Extensions:
Anterior: mental foramen.
Posterior: Angle of mandible.
Superior: myelohyoid line.
Inferior: intermediate tendon of digastric muscle.
Dr.Sherif Fahmy
49. Hyoglossus m.
Myelohyoid m.
Lingual n.
Hypoglossal n.
Submandibular duct
Deep part of submandibular
gland
Styloglossus
m.
Sublingual gland
Dr. Sherif Fahmy
53. Applied Anatomy
• Formation of a stone in its duct is
common because its secretion is
muco-serous and more viscid.
• In this case the gland swell during
chewing.
Dr.Sherif Fahmy