Cranial Nerves and TMJ Quiz

<p>Inferior alveolar nerve (C)</p> Signup and view all the answers

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

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

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

<p>Superficial temporal vessels (D)</p> Signup and view all the answers

<p>Auriculotemporal nerve (C)</p> Signup and view all the answers

<p>Anterior dislocation (C)</p> Signup and view all the answers

<p>Chorda tympani nerve (C)</p> Signup and view all the answers

<p>Superficial temporal artery (A), Maxillary artery (D)</p> Signup and view all the answers

<p>Supplying muscles of mastication (C)</p> Signup and view all the answers

<p>GVE fibers from the lesser petrosal nerve (B)</p> Signup and view all the answers

<p>The nerve encircles the artery with two roots (A)</p> Signup and view all the answers

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

<p>Skin of the cheek and buccal gingivae (A)</p> Signup and view all the answers

<p>Nerve to medial pterygoid (C)</p> Signup and view all the answers

<p>Anterior surface of the zygomatic bone (A)</p> Signup and view all the answers

<p>Assisting in chewing and moving food within the mouth (B)</p> Signup and view all the answers

<p>Middle meningeal artery (D)</p> Signup and view all the answers

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

<p>It permits both gliding and rotational movements (C)</p> Signup and view all the answers

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

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

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

<p>Posterior Superior Alveolar (B)</p> Signup and view all the answers

<p>Supplies extrinsic eye muscles (D)</p> Signup and view all the answers

<p>Descending Palatine (D)</p> Signup and view all the answers

<p>Muscles of mastication, maxillary v. (A)</p> Signup and view all the answers

<p>Veins accompanying branches of maxillary artery (C)</p> Signup and view all the answers

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

<p>Muscles of mastication and maxillary artery (B)</p> Signup and view all the answers

<p>Artery of the pterygoid canal (C)</p> Signup and view all the answers

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

<p>Rotation acting as a hinge (A)</p> Signup and view all the answers

<p>Articular disc and synovial membranes (C)</p> Signup and view all the answers

<p>It provides sensory innervation to the joint (B)</p> Signup and view all the answers

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

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

<p>It translates forward and upward against the articular eminence (D)</p> Signup and view all the answers

<p>It swings forward and inward (C)</p> Signup and view all the answers

<p>Nervo chorda tympani (A)</p> Signup and view all the answers

<p>Nervo alveolar inferior (D)</p> Signup and view all the answers

<p>Nervo buccal long (B)</p> Signup and view all the answers

<p>Nervo buccal long (D)</p> Signup and view all the answers

<p>Musculos de mastication (A)</p> Signup and view all the answers

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

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

<p>Temporalis (C)</p> Signup and view all the answers

<p>Nervo facial (D)</p> Signup and view all the answers

<p>Tres (C)</p> Signup and view all the answers

<p>Arteria meningeal medie (A)</p> Signup and view all the answers

<p>Arteria masseteric (D)</p> Signup and view all the answers

<p>Mantener le bolo inter le gena e le dentes (B)</p> Signup and view all the answers

<p>Elevate le mandibula. (A)</p> Signup and view all the answers

<p>Musculo pterygoid lateral (A)</p> Signup and view all the answers

<p>Depression del mandibula. (C)</p> Signup and view all the answers

<p>Musculo pterygoid lateral sinistre (B)</p> Signup and view all the answers

<p>Division mandibular (V3) (C)</p> Signup and view all the answers

<p>Le musculo temporal (D)</p> Signup and view all the answers

<p>Nervo alveolar inferior (C)</p> Signup and view all the answers

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

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

<p>Capite superficial del musculo pterygoid medial (B)</p> Signup and view all the answers

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

<p>Le superficie medial del ramo del mandibula (A)</p> Signup and view all the answers

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

<p>Nervo al mylohyoideo (B)</p> Signup and view all the answers

<p>Prove le innervation sensorial al ATM (A)</p> Signup and view all the answers

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

<p>Nervo petrose minor (B)</p> Signup and view all the answers

<p>Arteria temporal superficial, arteria auricular profunde, arteria tympanic anterior (D)</p> Signup and view all the answers

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

<p>Nervo auriculotemporal (C)</p> Signup and view all the answers

<p>Le contentos non indica altere nervos innervante sensorialmente le ATM (A)</p> Signup and view all the answers

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

<p>Le superior cavitate (C)</p> Signup and view all the answers

<p>Le angulo de excursion lateral del mandibula (B)</p> Signup and view all the answers

<p>Trigeminal n. (CN V) ramos V3 (A)</p> Signup and view all the answers

<p>Movimento de translation verso le linea mediana (D)</p> Signup and view all the answers

<p>Il se protude con le disco articular usque il se appoia contra le eminentia articular (A)</p> Signup and view all the answers

<p>Il crea cavitates superior e inferior (D)</p> Signup and view all the answers

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

The infratemporal fossa is a deep, wedge-shaped space located inferior to the zygomatic arch, deep to the ramus of the mandible, and posterior to the maxilla.

The infratemporal fossa is bordered superiorly by the greater wing of the sphenoid and temporal bones, anteriorly by the maxilla, posteriorly by the styloid process and the condylar process of the mandible, medially by the lateral pterygoid plate and the pyramidal process of the palatine bone, and laterally by the ramus of the mandible.

The infratemporal fossa contains important muscles for chewing, blood vessels that supply the face, and nerves for sensation and movement.

The muscles of mastication are responsible for chewing and include the masseter, temporalis, medial pterygoid, and lateral pterygoid.

The maxillary artery is the main blood supplier for the infratemporal fossa. It branches into several important vessels, including the inferior alveolar artery, the posterior superior alveolar artery, and the middle meningeal artery, among others.

The infratemporal fossa is drained by the maxillary vein, which connects to the pterygoid venous plexus. This plexus further connects to the facial vein and internal jugular vein.

The mandibular nerve (CN V3) innervates the muscles of mastication and provides sensation for the lower face. Its branches include the inferior alveolar nerve, the lingual nerve, and the buccal nerve.

The chorda tympani, a branch of the facial nerve (CN VII), travels through the infratemporal fossa to reach the submandibular ganglion where it carries taste sensation fibers for the anterior two-thirds of the tongue.

The second portion of the maxillary artery is situated near the pterygoid muscles and is responsible for supplying blood to various structures around the jaw.

The posterior superior alveolar artery branches from the third portion of the maxillary artery and provides blood supply to the molars and premolars in the upper jaw, the gums surrounding them, and the lining of the maxillary sinus.

The infraorbital artery branches from the third portion of the maxillary artery and supplies blood to the muscles that control eye movement, the canines and incisor teeth in the upper jaw, the lining of the maxillary sinus, and the skin beneath the eye socket.

The artery of the pterygoid canal branches from the third portion of the maxillary artery and supplies blood to the lining of the upper throat, the Eustachian tube, and the middle ear.

The pharyngeal artery branches from the third portion of the maxillary artery and supplies blood to the mucous lining of the roof of the nasal cavity, the nasopharynx, the sphenoid air sinus, and the Eustachian tube.

The descending palatine artery branches from the third portion of the maxillary artery and splits into two branches that supply blood to the roof of the mouth and the soft tissue behind it.

The sphenopalatine artery branches from the third portion of the maxillary artery and supplies blood to the walls and septum of the nasal cavity, the sinuses surrounding it, and the front part of the roof of the mouth.

The infratemporal fossa is a space in the skull that houses vital structures related to chewing and facial sensation. It contains muscles for chewing, the maxillary artery and its branches, veins that drain blood from this area, and nerves connecting the brain to the face.

A branch of the mandibular nerve (CN V3) that supplies sensation to the anterior two-thirds of the tongue, floor of the mouth, and lingual gingivae.

A branch of the facial nerve (CN VII) that joins the lingual nerve in the infratemporal fossa. Provides taste sensation from the anterior two-thirds of the tongue. Also carries secretomotor fibers to the submandibular and sublingual salivary glands.

This nerve provides sensory innervation to the skin and oral mucosa of the cheek and buccal gingivae.

A branch of the mandibular nerve that supplies the muscles of mastication, which are responsible for chewing.

The third and largest branch of the trigeminal nerve (CNV). It supplies the muscles of mastication, provides sensory innervation to the lower face and teeth, and carries taste sensation from the anterior two-thirds of the tongue.

A branch of the mandibular nerve (CN V3) that provides sensory innervation to the temporomandibular joint (TMJ) and superficial structures of the ear and temple.

A branch of the mandibular nerve (CN V3) that enters the mandibular canal through the mandibular foramen and provides sensory innervation to the mandibular teeth.

A branch of the inferior alveolar nerve (CN V3) that innervates the anterior belly of the digastric muscle and the mylohyoid muscle, responsible for depressing the mandible and elevating the tongue.

Parasympathetic ganglion located near the foramen ovale, responsible for relaying parasympathetic innervation to the parotid gland via the auriculotemporal nerve.

The parasympathetic innervation to the parotid gland originates from the glossopharyngeal nerve (CN IX) and travels through the otic ganglion, stimulating saliva production.

A branch of the glossopharyngeal nerve (CN IX) that travels through the middle ear and contributes to the tympanic plexus, eventually leading to the lesser petrosal nerve.

A branch of the tympanic plexus, arising from the tympanic nerve, that carries postsynaptic parasympathetic fibers from the otic ganglion to the parotid gland via the auriculotemporal nerve.

The auriculotemporal nerve is responsible for providing sensory innervation to the external ear, tympanic membrane, temple, and temporomandibular joint (TMJ). It also carries parasympathetic fibers that originate from the lesser petrosal nerve (CN IX) and innervate the parotid gland.

The auriculotemporal nerve splits into two roots that encircle the middle meningeal artery. These roots fuse and travel between the sphenomandibular ligament and the neck of the mandible. It then ascends and travels with the superficial temporal artery and vein.

The blood supply to the TMJ is derived from three main arteries: the superficial temporal artery, the deep auricular artery, and the anterior tympanic artery.

A TMJ dislocation is a displacement of the head of the mandible from the mandibular fossa. It can be unilateral or bilateral, with the anterior displacement being the most common type. Posterior, superior, and lateral dislocations are rare and usually associated with trauma.

TMJ dislocations can occur due to atraumatic causes like yawning or excessive chewing, as well as traumatic causes such as a direct blow to the jaw.

The temporomandibular joint (TMJ) is a complex joint that allows for a wide range of jaw movements, including opening, closing, protrusion, retrusion, and side-to-side movements.

The TMJ is formed by the articulation of the mandibular condyle with the mandibular fossa and articular eminence of the temporal bone. It is a synovial joint, meaning it has a joint cavity filled with synovial fluid that lubricates and reduces friction.

The articular disc is a fibrous cartilage structure that sits between the mandibular condyle and the temporal bone, dividing the joint cavity into superior and inferior compartments. It acts as a shock absorber and aids in smooth joint movement.

The superior compartment of the TMJ allows for gliding or translational movements, such as protrusion and retrusion of the mandible. This occurs as the mandibular condyle slides along the articular eminence.

The inferior compartment of the TMJ is responsible for hinge movements, such as opening and closing the mouth. This occurs as the mandibular condyle rotates around its axis, primarily during the initial opening phase.

During side-to-side movements (grinding or pivoting), one condyle acts as a rotating condyle, while the other condyle, known as the swinging condyle, undergoes a translational movement. This coordinated movement allows for efficient chewing and grinding of food.

The auriculotemporal nerve and masseteric nerve, both branches of the trigeminal nerve (CN V3), provide innervation to the TMJ. These nerves carry sensory information from the joint, as well as motor signals to the muscles that control jaw movements.

The TMJ is a delicate and complex joint that can be prone to various disorders, including TMJ dysfunction, pain, and clicking or popping sounds. Understanding the anatomy and biomechanics of the TMJ is crucial for diagnosing and treating these conditions.