Anterior Triange

Question 1

where is the anterior trainange

Answer 1

front of the neck

Question 2

borders of the anterior triange

Answer 2

Superiorly – inferior border of the mandible (jawbone).
Laterally – anterior border of the sternocleidomastoid.
Medially – sagittal line down the midline of the neck.Investing fascia covers the roof of the triangle, while visceral fascia covers the floor

Question 3

what ae teh suprahyoid muscles

Answer 3

Stylohyoid
Digastric
Mylohyoid
Geniohyoid

smdg

Question 4

what are the infrahyoid muscles

Answer 4

Omohyoid
Sternohyoid

Thyrohyoid

Sternothyroid

TOSS

Question 5

what are important contents within the anterior triange

Answer 5

The common carotid artery bifurcates within the triangle into the external and internal carotid branches. The internal jugular vein can also be found within this area – it is responsible for venous drainage of the head and neck.

Numerous cranial nerves are located in the anterior triangle. Some pass straight through, and others give rise to branches which innervate some of the other structures within the triangle. The cranial nerves in the anterior triangle are the facial [VII], glossopharyngeal [IX], vagus [X], accessory [XI], and hypoglossal [XII] nerves.

Question 6

what are the subdiviions of the anterior triangle and by what is it subdivided

Answer 6

the hyoid bone, suprahyoid and infrahyoid muscles into four triangles. making the caritid triangle submental Submandibular Muscular

Question 7

desribe the submental triangle

Answer 7

The submental triangle in the neck is situated underneath the chin. It contains the submental lymph nodes, which filter lymph draining from the floor of the mouth and parts of the tongue.

It is bounded:

Inferiorly – hyoid bone.
Medially – midline of the neck.
Laterally – anterior belly of the digastric
The base of the submental triangle is formed by the mylohyoid muscle, which runs from the mandible to the hyoid bone.

Question 8

describe the submandibular triangle

Answer 8

The submandibular triangle is located underneath the body of the mandible. It contains the submandibular gland (salivary), and lymph nodes. The facial artery and vein also pass through this area.

The boundaries of the submandibular triangle are:

Superiorly – body of the mandible.
Anteriorly – anterior belly of the digastric muscle.
Posteriorly – posterior belly of the digastric muscle.

Question 9

desribe the musvular triange

Answer 9

The muscular triangle is situated more inferiorly than the subdivisions. It is a slightly ‘dubious’ triangle, in reality having four boundaries. The muscular triangle contains some muscles and organs – the infrahyoid muscles, the pharynx, and the thyroid, parathyroid glands.

The boundaries of the muscular triangle are:

Superiorly – hyoid bone.
Medially – imaginary midline of the neck.
Supero-laterally – superior belly of the omohyoid muscle.
Infero-laterally – inferior portion of the sternocleidomastoid muscle.