Anatomy of the Submandibular Region

False (B)

mylohyoid

<p>stylomandibular</p> Signup and view all the answers

<p>Hyoglossus muscle (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Plane I = Digastric and Stylohyoid Plane II = Mylohyoid Plane III = Geniohyoid, Hyoglossus and Styloglossus Plane IV = Genioglossus and a part of superior constrictor of pharynx</p> Signup and view all the answers

<p>hyoglossus</p> Signup and view all the answers

<p>Facial nerve (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Viscous secretion and a tortuous upward duct course</p> Signup and view all the answers

<p>mucous</p> Signup and view all the answers

<p>Wharton's duct = Submandibular gland Ducts of Rivinus = Sublingual gland Duct of Bartholin = Sublingual gland</p> Signup and view all the answers

<p>Both A and B (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Lingual nerve</p> Signup and view all the answers

<p>superior salivatory nucleus</p> Signup and view all the answers

<p>Parasympathetic root = Preganglionic fibers from superior salivatory nucleus Sympathetic root = Postganglionic fibers from superior cervical ganglion Sensory root = Fibers from the lingual nerve</p> Signup and view all the answers

The region located under the body of the mandible, extending from the mylohyoid lines above to the hyoid bone below.

The key muscle in the submandibular region, responsible for depressing the tongue and elevating the hyoid bone.

The submandibular gland is approximately the size of a walnut and is divided into two parts: a larger superficial part and a smaller deep part.

The anterior end of the superficial part of the submandibular gland extends towards the anterior belly of the digastric muscle, while the posterior end reaches the stylomandibular ligament.

The inferior surface of the superficial part of the submandibular gland is covered by skin, superficial fascia, and deep cervical fascia. It's also crossed by the facial vein and cervical branch of the facial nerve.

The lateral surface of the superficial part of the submandibular gland is related to the submandibular fossa of the mandible, the medial pterygoid muscle, and the facial artery which loops around the lower border of the mandible to reach the face.

The medial surface of the superficial part of the submandibular gland is divided into three parts: anterior, middle, and posterior. The anterior part rests on mylohyoid muscle, the middle part rests on hyoglossus muscle, lingual nerve, submandibular ganglion, and hypoglossal nerve, and the posterior part is related to stylohyoid muscle, stylohyoid ligament, glossopharyngeal nerve, and the wall of the pharynx.

The deep part of the submandibular gland extends forward between the mylohyoid and hyoglossus muscles, reaching the posterior end of the sublingual salivary gland.

The deep part of the submandibular gland is located near several important structures. Medially, it lies next to the Hyoglossus muscle. Laterally, it's close to the Mylohyoid muscle. Above, you'll find the Lingual nerve and the Submandibular ganglion. Finally, below, the Hypoglossal nerve, accompanied by veins, and the Submandibular duct run alongside it.

The Submandibular duct, also known as Wharton's duct, is a tube that carries saliva from the submandibular gland to the mouth. This duct is about 5 cm long and emerges from the front of the deep part of the gland.

The Submandibular duct travels forward, passing between the Hyoglossus and Genioglossus muscles. Along its journey, it is crossed by the Lingual nerve near the front edge of the Hyoglossus muscle.

The Submandibular duct finally opens into the oral cavity on the Sublingual papilla, which is located next to the frenulum of the tongue. This is the point where saliva from the submandibular gland enters the mouth.

The sublingual gland is the smallest of the three major salivary glands. It primarily produces mucus, which helps lubricate food in the mouth.

The sublingual gland is located in the floor of the mouth, sandwiched between the mucous membrane and the Mylohyoid muscle. It rests in a special space of the mandible called the sublingual fossa.

The sublingual gland has many small ducts (ducts of Rivinus) that open independently into the floor of the mouth. Some ducts from the front of the gland combine to form the sublingual duct (duct of Bartholin).

The Submandibular ganglion is like a relay station for nerves. It is involved in controlling the salivary glands: the submandibular and sublingual glands. It receives signals from the facial nerve (through its chorda tympani branch) and transmits them to the glands.

The Submandibular ganglion is located on the outer surface of the Hyoglossus muscle. It's attached to the Lingual nerve by two 'roots': a posterior one and an anterior one.

The Submandibular ganglion receives three types of nerve fibers: Parasympathetic, Sympathetic, and Sensory. Each type plays a role in the function of the ganglion.