SUBMANDIBULAR REGION

अधःहनु क्षेत्र region
Suprahyoid muscles ( अधिकंठ पेशी )
- Layers ( स्तर )
  - First layer ( अग्र स्तर )
    - Digastric muscle ( द्वितुंदी पेशी )
  - Second layer ( द्वितीय स्तर )
    - Mylohyoid muscle
  - Third layer ( तृतीय स्तर )
    - Geniohyoid and hyoglossus ( जिह्वकंठिका , चिबुककंठिका )
  - Fourth layer ( चतुष्ट स्तर )
    - Genioglossus ( चिबुकजिह्व )
- Relations of posterior belly of digastric ( पश्च तुंद के संबंध )
  - Superficial ( ऊपर )
    - Mastoid process with ( कर्णमूल )
      - sternocleidomastoid , splenius capitis and longissimus capitis
    - Stylohyoid
    - Parotid gland ( कर्णपूर्व ग्रन्थि )
    - Submandibular salivary gland ( अधःहनु ग्रन्थि )
  - Deep ( गंभीर या गहरा )
    - 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 ( उपरिस्थ )
    - Anterior belly of digastric ( अग्र तुंद - द्वितुंदी पेशी का )
    - Superficial part of submandibular salivary gland ( उपरिस्थ भाग अधःहनु ग्रन्थि का )
    - Mylohyoid nerve and vessels
    - Submental branch of facial artery ( आनन धमनी का चिबुक शाखा )
  - Deep ( गहरा )
    - Hyoglossus with is superficial relations
      - Styloglossus
      - Lingual nerve
      - Submandibular ganglion
      - Deep part of submandibular salivary 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