Anatomy-Oral Cavity Flashcards
What are the two parts of the oral cavity?
Vestibule (between cheeks and teeth). Oral cavity proper.
What are the structures indicated below?
Frenula. Folds of mucous membrane from the gums to the lips.
What structures are indicated below?
Parotid ducts.
What structure is indicated below?
Incisive papilla. This is where the nasopalatine nerves transmit.
What structure is indicated below?
Palatine raphe
Where can you find the palatine tonsils?
They lie between the palatoglossal fold (posterior boundary of the oral cavity) and the palatopharyngeal fold.
What structures of the tongue are separated by the image seen below?
The line is the sulcus terminalis. It separates the anterior 2/3 of the tongue (oral part) from the posterior 1/3 of the tongue (pharyngeal part).
What structures are indicated by the arrows below?
Red = sulcus terminalis. Black = foramen cecum. Green = circumvallate papillae (lots of taste buds)
What anatomical structure could you cut on Koreans to help them with their pronunciation (ankyloglossia)?
Lingual frenulum. It connects the tongue to the floor of the oral cavity.
From what structures do you gleak?
Sublingual caruncle and sublingual fold. These are openings for the submandibular salivary duct.
What anatomical structures allow you to take drugs sublingually?
Deep lingual vein & artery
What are the intrinsic muscles of the tongue? What are they innervated by?
Transverse, longitudinal, vertical. They are all innervated by CN XII.
What are the extrinsic muscles of the tongue? What are they innervated by?
Genioglossus (protudes & depresses tongue). Hyoglossus (retract & depresses tongue). Styloglossus (retracts & curls tongue). Palatoglossus. These are all innervated by CN XII, except for palatoglossus (CN X’s pharyngeal plexus).
What way would the tongue deviate if you bit through glass that cut your hypoglossal nerve?
Toward the side of the injury
What nerves are responsible for sensory innervation of the tongue?
Anterior: taste = VII, sensation = V3 (lingual branch of trigeminal). Posterior: taste = IX. Epiglottic: taste = X (internal laryngeal)
What is the blood supply of the tongue?
The second branch of the external carotid artery: the lingual artery. Dorsal & deep veins drain into the internal jugular vein.
What muscles are located in the floor of the mouth? What innervates these?
1) Mylohyoid (CN V) 2) Genuhyoid (C1 fibers)
What structure rides near the submandibular duct?
The lingual nerve (1). Also note that the submandibular parasympathetic ganglion (2) will be located around the submandibular duct (3).
What structures are indicated below?
1) Palatine, 2) lingual and 3) pharyngeal tonsils.
What are the four muscles indicated below? What are they innervated by?
The four muscles of the soft palate: 1) Levator Veli Palatini (CN X) 2) Musculus uvulae (CN X) 3) Palatopharyngeus (CN X) 4) Tensor Veli Palatini (CN V3)
