Submandibular region
Suprahyoid muscles
Layers
First layer
Digastric
muscle
Second layer
Mylohyoid
muscle
Third layer
Geniohyoid and hyoglossus
Fourth layer
Genioglossus
Relations of posterior belly of digastric
Superficial
Mastoid process with
sternocleidomastoid , splenius capitis and longissimus capitis
Stylohyoid
Parotid
gland
Submandibular salivary
gland
Deep
Transverse process of atlas with superior oblique and rectus capitis Lateralis
Internal jugular vein
Internal carotid , external carotid , lingual , facial and occipital arteries
Upper border
Posterior auricular artery
Stylohyoid
muscle
Lower border
Related to occipital artery
RELATIONS OF MYLOHYOID
Superficial
Anterior belly of digastric
Superficial part of submandibular salivary
gland
Mylohyoid
nerve
and vessels
Submental branch of facial artery
Deep
Hyoglossus with is superficial relations
Styloglossus
Lingual
nerve
Submandibular ganglion
Deep part of submandibular saliavry
gland
Genioglossus
Relations of hyoglossus
Superficial
Deep
Inferior longitudinal
muscle
of
tongue
Genioglossus
Middle constrictor of pharynx
Glossopharyngeal
nerve
Stylohyoid ligament
Lingual artery
Deep to posterior border of hyoglossus
Glossopharyngeal
nerve
Stylohyoid ligament
Lingual artery
SUBLINGUAL GLAND
RELATIONS
front - meets opposite side
gland
Behind - comes in contact with deeper part fo submandibular
gland
Above - mucous membrane of
mouth
Below - mylohyoid
muscle
Lateral - sublingual fossa
Medial - genioglossus
muscle