What are the triangles in the neck?
The three paired triangles are the submandibular (digastric), carotid, and muscular triangles. The unpaired triangle is the submental triangle.
Why are triangles of the neck important?
The triangles of the neck are important because of their contents, as they house all the neck structures, including glands, nerves, vessels and lymph nodes. Two triangular areas found anterior and posterior to the sternocleidomastoid muscles which contain the visceral structures of the neck.
What is in posterior triangle of neck?
These borders include the trapezius muscle posteriorly, the sternocleidomastoid muscle anteriorly, and the middle one-third of the clavicle inferiorly. The posterior neck triangle is covered superficially to deep by the skin, superficial and deep cervical fascia, and the platysma muscle.
What 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 posterior triangle has the following 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 supraclavicular triangle?
neck
The supraclavicular 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).
What causes posterior cervical lymph nodes to swell?
Posterior cervical or occipital lymphadenopathy may be caused by scalp infection or dermatitis, roseola or rubella infection.
Can you feel submandibular triangle?
The submandibular gland resides just under the inferior border of the mandibular body and is best palpated bi-manually with one hand in the lateral floor of the mouth and the other on the submandibular gland. The gland is usually soft and mobile and should not be tender to palpation.
What is the anterior triangle of neck?
The anterior triangles refer to bilateral anatomic subdivisions of the neck comprising the anterior surface of the neck, deep to the superficial cervical fascia and platysma muscle. Laterally, the anterior triangle is bounded by the anterior border of the sternocleidomastoid muscle.
What causes supraclavicular lymph nodes?
Glands above the collarbone (supraclavicular lymph nodes) may swell from an infection or tumor in the areas of the lungs, breasts, neck, or abdomen.
What causes posterior triangle lymph nodes?
Any viral or bacterial infection of the upper respiratory tract or pharynx can cause enlargement, including mouth infections such as herpetic stomatitis, or dental infection. Posterior cervical or occipital lymphadenopathy may be caused by scalp infection or dermatitis, roseola or rubella infection.