Floor Muscles Of Digastric Triangle

The digastric muscle also digastricus named digastric as it has two bellies is a small muscle located under the jaw the term digastric muscle refers to this specific muscle.

Floor muscles of digastric triangle.

Below by the posterior belly of the digastricus. The digastric muscle is composed of two bellies anterior and posterior connected by an intermediate round tendon. 2 bellies of digastric anterior. Muscles digastric muscle stylohyoid geniohyoid mylohyoid hyoglossus middle pharyngeal constrictor nerves mylohyoid nerve cn v.

The digastric muscle divides the anterior triangle of the neck into three smaller divisions. Digastric or submandibular triangle. The two bellies of the muscle have different embryonic origins and hence are supplied by different cranial nerves. Submandibular triangle is bordered by the mandible and bellies of the digastric muscle.

In front by the anterior belly of the digastricus. Above by the lower border of the body of the mandible and a line drawn from its angle to the mastoid process. A major landmark of the submandibular triangle is the submandibular gland innervated by the facial nerve. The carotid triangle of the neck has the following boundaries.

Mastoid process of temporal bone. The posterior belly of digastric muscle forms the superior border of the carotid triangle. The digastric triangle is one of the paired triangles in the anterior triangle of the neck. Superior posterior belly of the digastric muscle.

However other muscles that have two separate muscle bellies include the ligament of treitz omohyoid occipitofrontalis. Digastric fossa on the deep surface of symphysis menti of the mandible. Digastric triangle also known as submandibular triangle is named due to it is position in the middle of the two bellies of the digastric muscle and inferior towards the base of the mandible. On floor of mouth between mandible and genioglossus.

Suprahyoid muscles digastric ant and post belly mylohyoid geniohyoid and stylohyoid. 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. Investing fascia covers the roof of the triangle while visceral fascia covers the floor. Muscles nerves blood vessels glands.

It lies below the body of the mandible and extends in a curved form from the mastoid. What are the contents of the submandibular triangle. Infrahyoid muscles omohyoid sternohyoid sternothyroid and thyrohyoid. The anterior triangle is subdivided by the hyoid bone suprahyoid and infrahyoid muscles into four triangles.

This paired triangle contains some very important structures such as the common carotid artery internal carotid. Lateral medial border of the sternocleidomastoid muscle.