Oral, orbital and nasal cavities NOT DONE

What separates the anterior and posterior tongue?

Sulcus terminalis

What is the general and taste innervation to the anterior 2/3 of the tongue?

General: Lingual nerve (branch of CN Vc)

Taste: chorda tympani (runs with CN VII, then lingual nerve)

What is the general and taste innervation to the posterior 1/3 of the tongue?

Both CN IX (glossopharyngeal nerve)

Lymphatic drainage of the anterior and posterior tongue

Anterior: Submental/submandibular nodes, then to deep nodes (unilateral)
Posterior: Directly to deep nodes (bilateral)

What is the function of the filiform papillae?

increase the friction between the food and the tongue, enabling the texture perception of food

What is the function of fungiform papillae?

Has tastebuds in between the papillae → taste

also sense temperature (thermoreception) and touch (mechanoreception)

Location of the major salivary glands

Parotid: encapsulated by the investing layer of deep fascia

Submandibular:

• deep part = superior to mylohyoid

• superficial part = inferior to mylohyoid

Sublingual: multiple ducts opening onto sublingual fold