Anatomic Science Quiz 9

Ligaments Attaching the TMJ Meniscus to the Condyle

The articulating disc (meniscus) of the temporomandibular joint attaches to the mandibular condyle via which ligaments that function to limit lateral excursion?

Direction of TMJ Disc Displacement upon Collateral Ligament Tearing

If the collateral ligaments of the TMJ tear, the lateral pterygoid muscle will cause displacement of the articulating disc in which direction?

Sinus Located Inferior to the Pituitary Gland

The pituitary gland is located in the middle cranial fossa, just superior to which sinus, which is seated in the sphenoid bone?

Nerve Compromised by Mandibular Third Molar Extraction (Affecting Taste Anterior 2/3 and Sensation)

Iatrogenic impingement near mandibular third molars causing altered taste sensation to the anterior 2/3 of the tongue, as well as general sensation to the ipsilateral side of the tongue, suggests compromise of which structure?

Fascial Plane for Mandibular Molar Odontogenic Infection Spread

An odontogenic infection originating at the root apices of a mandibular molar would most likely travel within the submandibular fascial plane via piercing of which muscle?

Location for Cricothyrotomy

In an emergency situation requiring a cricothyrotomy to bypass a superior airway obstruction, an incision is made between which cartilaginous landmarks?

Structure Damaged by Excessively Posterior IAN Block

If an inferior alveolar nerve block needle is advanced too far posteriorly, which structure may be infiltrated, potentially causing ipsilateral facial paralysis?

Formation of the Pterygomandibular Raphe

The pterygomandibular raphe is formed by the convergence of which two muscles?

Locating the IAN Block Injection Site

To locate the area where anesthesia is deposited for an inferior alveolar nerve (IAN) block, the dentist palpates which landmark on the anteromedial border of the ramus?

PDL Fibers Running at Right Angles to Cementum and Bone

Which type of principal collagen fiber of the Periodontal Ligament (PDL) runs from the cementum, at right angles, to the alveolar bone?

Collagen Types in Principal PDL Fibers

The principal collagen fibers of the PDL are composed mostly of which type(s) of collagen?

Most Abundant Cell Type in the Periodontal Ligament (PDL)

Which of the following is the most abundant cell of a healthy periodontal ligament?

Arteries Contributing to Kiesselbach Plexus

All of the following vessels contribute to Kiesselbach plexus, which is often involved in epistaxis, EXCEPT:

Bones Forming the Orbit

The orbit of the eye is composed of seven separate bones. Which bone is NOT part of the orbit?

Major Blood Supply to the Eye and Orbit

Which artery serves as the major blood supply of the eye and orbit, branching from the internal carotid artery and entering the orbit via the optic canal?

Muscle of Mastication Originating on the Zygoma/Maxilla

Which muscle of mastication originates on the zygomatic process of the maxilla (superficial head) and the zygomatic arch (deep head)?

Location of the Superior Orbital Fissure

The superior orbital fissure, which transmits CN III, IV, V1, and VI, is located between which two bones?

Drainage of the Nasolacrimal Duct

The nasolacrimal duct drains into which structure of the nasal cavity?

Characteristics of the Lacrimal Gland

Each of the following is TRUE regarding the lacrimal gland EXCEPT:

 Innervation of the Platysma Muscle

The platysma muscle, considered a muscle of facial expression, is innervated by which cranial nerve?