Anterior Triangle of the Neck - Digastric Triangle #Anatomy #mbbs#education #bds#headandneckanatomy
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DIGASTRIC TRIANGLE
Boundaries
The boundaries
DIGASTRIC TRIANGLE
Boundaries
The boundaries of the digastric triangle are as follows.
Anteroinferiorly : Anterior belly of digastric.
Posteroinferiorly: Posterior belly of digastric and the stylohyoid.
Superiorly or base: Base of the mandible and a line joining the angle of the mandible to the mastoid process
Roof:
The roof of the triangle is formed by:
1. Skin.
2. Superficial fascia, containing:
a. The platysma.
b. The cervical branch of the facial nerve.
c. The ascending branch of the transverse or anterior cutaneous nerve of the neck.
3. Deep fascia, which splits to enclose the submandibular salivary gland
Floor:
The floor is formed by
• the mylohyoid muscle anteriorly,
• the hyoglossus posteriorly.
• A small part of the middle constrictor muscle of the pharynx, appears in the floor
Contents
Anterior Part of Triangle
• Structures superficial to mylohyoid are:
1. Superficial part of the submandibular salivary gland
2. The facial vein and the submandibular lymph nodes are superficial to it and the facial artery is deep to it.
3. Submental artery
4. Mylohyoid nerve and vessels.
5. The hypoglossal nerve.
• Posterior Part of Triangle
1. Superficial structures are:
a. Lower part of the parotid gland.
b. The external carotid artery before it enters the parotid gland.
2 Deep structures, passing between the external and internal carotid arteries are:
a. The styloglossus.
b. The stylopharyngeus.
c. The glossopharyngeal nerve
d. The pharyngeal branch of the vagus nerve.
e. The styloid process.
f. A part of the parotid gland.
3 Deepest structures include:
a. The internal carotid artery.
b. The internal jugular vein.
c. The vagus nerve.
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5 سال پیش
در تاریخ 1398/03/28 منتشر شده
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