Anterior Triangles of The Neck | Boundaries | Subdivisions | Muscular & Submental Triangles
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BOUNDARIESMedial: The anterior median plane
BOUNDARIES
Medial: The anterior median plane of the neck
Lateral: sternocleidomastoid
Superior: Base of the mandible and a line joining the angle of the mandible to the mastoid process
SUBDIVISIONS
The anterior triangle is subdivided (by the digastric muscle and the superior belly of the omohyoid into:
a. Submental
b. Digastric
c. Carotid
d. Muscular triangles
SUBMENTAL TRIANGLE
This is a median triangle.
It is bounded as follows.
• On each side, there is the anterior belly of the digastric muscles.
• base is formed by the body of the hyoid bone.
• apex lies at the chin.
• floor of the triangle is formed by the right and left mylohyoid muscles and the median raphe
uniting them
Contents
1. Two to four small submental lymph nodes are situated in the superficial fascia between
the anterior bellies of the digastric muscles.
They drain:
a. Superficial tissues below the chin.
b. Central part of the lower lip.
c. The adjoining gums.
d. Anterior part of the floor of the mouth.
e. The tip of the tongue. Their efferents pass to the submandibular nodes.
2. Small submental veins join to form the anterior jugular veins.
Muscular Triangle
BOUNDARIES
Anteriorly: Anterior median line of the neck from the hyoid bone to the sternum.
Posterosuperiorly: Superior belly of the omohyoid muscle
Posteroinferiorly: Anterior border of thesternocleidomastoid muscle.
Contents
The infrahyoid muscles are:
a. Sternohyoid
b. Sternothyroid
c. Thyrohyoid
d. Omohyoid
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Medial: The anterior median plane of the neck
Lateral: sternocleidomastoid
Superior: Base of the mandible and a line joining the angle of the mandible to the mastoid process
SUBDIVISIONS
The anterior triangle is subdivided (by the digastric muscle and the superior belly of the omohyoid into:
a. Submental
b. Digastric
c. Carotid
d. Muscular triangles
SUBMENTAL TRIANGLE
This is a median triangle.
It is bounded as follows.
• On each side, there is the anterior belly of the digastric muscles.
• base is formed by the body of the hyoid bone.
• apex lies at the chin.
• floor of the triangle is formed by the right and left mylohyoid muscles and the median raphe
uniting them
Contents
1. Two to four small submental lymph nodes are situated in the superficial fascia between
the anterior bellies of the digastric muscles.
They drain:
a. Superficial tissues below the chin.
b. Central part of the lower lip.
c. The adjoining gums.
d. Anterior part of the floor of the mouth.
e. The tip of the tongue. Their efferents pass to the submandibular nodes.
2. Small submental veins join to form the anterior jugular veins.
Muscular Triangle
BOUNDARIES
Anteriorly: Anterior median line of the neck from the hyoid bone to the sternum.
Posterosuperiorly: Superior belly of the omohyoid muscle
Posteroinferiorly: Anterior border of thesternocleidomastoid muscle.
Contents
The infrahyoid muscles are:
a. Sternohyoid
b. Sternothyroid
c. Thyrohyoid
d. Omohyoid
----------------------------------------------------------------------------------------------------------------
My website - https://human-anatomy-lessons.busines...
----------------------------------------------------------------------------------------------------------------
Follow me in blogspot - https://human-anatomylessons.blogspot... _________________________________________________________________________________________________________________ Visit my blogs - https://humananatomyonline.in/
Contact me @ https://t.me/humananatomylessons
5 سال پیش
در تاریخ 1398/03/22 منتشر شده
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