What are the boundaries of the triangles of the neck?
The anterior cervical triangle is bounded by the midline of the neck, the anterior border of the sternocleidomastoid muscle (SCM), and the inferior border of the mandible [3]. This triangle is typically subdivided into three paired and one unpaired triangle.
What are the borders of the anterior triangle of the neck?
Laterally, the anterior triangle is bounded by the anterior border of the sternocleidomastoid muscle. Its superior border is the inferior border of the mandible. Medially, the boundary is the midline of the neck. The anterior triangle can further subdivide into four sub-triangles.
How many anatomical triangles are present in the neck?
The neck is divided into two large triangles (anterior and posterior cervical triangles) by the sternocleidomastoid muscle. It arises from two heads (sternal and clavicular) inferiorly and takes an oblique course superiorly to insert into the mastoid process and lateral aspect of the superior nuchal line.
What are the boundaries of the posterior triangle of the neck?
Boundaries
- Apex: Union of the sternocleidomastoid and the trapezius muscles at the superior nuchal line of the occipital bone.
- Anteriorly: Posterior border of the sternocleidomastoideus.
- Posteriorly: Anterior border of the trapezius.
- Inferiorly: Middle one third of the clavicle.
Where is the submandibular triangle?
The submandibular triangle, also known as the digastric triangle, is bounded anteriorly by the anterior belly of the digastric muscle, posteriorly by the posterior belly of the digastric muscle, superiorly by the mandible, and inferiorly by the mylohyoid and hypoglossus muscles.
What muscles are part of the posterior triangle?
The borders of the posterior triangle of the neck are formed by the trapezius muscle posteriorly, the sternocleidomastoid muscle anteriorly, and the omohyoid muscle inferiorly. The roof is formed by fascia, and the floor is formed by the splenius capitus, levator scapulae, and scalene muscles.
What separates the anterior and posterior triangles of the neck?
The sternocleidomastoid muscle divides the neck region into posterior and anterior triangles.
Whats in the submandibular triangle?
The submandibular triangle is largely defined by the digastric muscle, which is a double-bellied muscle that depresses the mandible i.e. opens the mouth. Submandibular triangle is bordered by the mandible and bellies of the digastric muscle.
What are the contents of the occipital triangle?
Contents
- spinal accessory nerve.
- cutaneous and muscular branches of the cervical plexus.
- upper most part of brachial plexus.
- supraclavicular nerve.
- transverse cervical vessels.
What is the submandibular triangle?
Where is the submandibular triangle located?
The submandibular triangle (or submaxillary or digastric triangle) corresponds to the region of the neck immediately beneath the body of the mandible.
Where is occipital triangle located?
The occipital triangle is one of the paired triangles in the posterior triangle of the neck. The triangles of the neck are surgically focused, first described from early dissection-based anatomical studies which predated cross-sectional anatomical description based on imaging (see deep spaces of the neck).
