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65 Cards in this Set
- Front
- Back
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What are the boundaries for the infratemporal fossa?
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Anterior: maxillary bone
Medial: Lateral pterygoid plate Lateral: Ramus of mandible Posterior: temporal bone |
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Name four structural components of the mandible.
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Body
Ramus Condyle Coronoid process |
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What type of movement of the TMJ will cause hinge like movements?
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Elevation and depression
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What type of movements of the TMJ will cause gliding movements?
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Protraction and retraction
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What two ligaments and connective tissue hold the TMJ together?
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Sphenomandibular ligament
Stylomandibular ligament Joint capsule |
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What covers the articular surface of the TMJ?
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Hyaline cartilage
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Dislocation of the TMJ will place the condyle into what area?
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Infratemporal fossa
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What direction does the head of the mandible move when the opens?
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The head will glide anteriorly as it hinges open.
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What structure is to prevent the dislocation of the condyle into the infratemporal fossa?
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The articular tubercle
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Describe the position of the condyle with respect to the articular tubercle when the jaw is closed, open, and dislocated.
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Closed: Condyle is posterior
Open: Condyle is inferior Dislocated: Condyle is anterior |
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Generally, which muscles, nerves and artery groups are found in the infratemporal fossa?
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Muscles of mastication
Branches of the mandibular nerve Branches of the maxillary artery |
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What nerve and type of nerve fiber innervates the teeth?
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Inferior alveoli nerve
Somatosensory |
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CN V carries two types of nerve fibers. What are they and what divisions carry them?
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V1: General sense
V2: General sense V3: General sense and branchiomotor to muscles of mastication |
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What type of sensory innervation does the tongue require?
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General sensory
Special viscerosensory (Taste) |
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What nerves innervate the glands of the head?
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All innervated by CN VII except for parotid which is CN IX
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What type of autonomic innervation do the glands of the head receive?
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Parasympathetic
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Identify structures
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Identify structures
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Identify structures
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Identify structures
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What is the action of the masseter? Which side will it deviate the jaw?
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Elevator of the jaw
Sight deviation to the same side |
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How are the fibers of the temporalis oriented?
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Anterior fibers are vertical for elevation
Posterior fibers are horizontal for retraction |
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What is the action of the temporalis?
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Elevation and retraction
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What is the point of insertion for the temporalis muscle?
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The coronoid process
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What CN supplies the muscles of mastication?
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CN V3 (Mandibular division)
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What muscle of mastication is used to open the jaw?
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Lateral pterygoid muscle
(Pulls condyle forward) |
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What two muscles of mastication form a sling (or "V") around the mandible?
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Masseter and Medial pterygoid muscle
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The lateral and medial pterygoid muscles arise from what boney structure?
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Lateral pterygoid plate of the sphenoid
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What muscles of mastication are elevators?
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Masseter
Temporalis Medial pterygoid |
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Which muscles of mastication are depressors?
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Only lateral pterygoid
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Which muscles of mastication are protractors?
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Lateral pterygoid
Medial pterygoid (Masseter) |
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Which muscles of mastication are retractors?
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Only temporalis
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Which muscles of mastication are rotators?
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Temporalis
Lateral pterygoid Medial pterygoid |
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What type of membrane covers the non-weight bearing surfaces of the TMJ?
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Synovial membrane
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What nerves course in between the medial and lateral pterygoid muscles?
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Inferior alveolar nerve and the lingual nerve
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Which muscles of mastication are in the infratemporal fossa?
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Medial and lateral pterygoids
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What are the branches of the Maxillary artery that can be found deep in the infratemporal fossa?
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(MIMS)
Middle meningeal Inferior alveolar Muscular branches Sphenopalatine |
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What are the branches of the Maxillary artery?
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Middle Meningeal
Inferior alveolar Muscular branches Deep temporal Sphenopalatine |
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Through what area does the deep temporal artery pass?
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pterygomaxillary fissure
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What does the middle meningeal artery supply?
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The dura of the neurocranium
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What are the branches of the CN V3?
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Main Trunk:
Meningeal Medial pterygoid Tensor veli palatini Tensor tympani Anterior Division: Buccal (S) Lateral pterygoid (M) Masseter (M) Anterior deep temporal (M) Posterior deep temporal (M) Posterior Division: Auriculotemporal (S) Lingual (S) Inferior alveolar (S) (M branch--mylohyoid) |
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What the anterior branches of CN V3?
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Anterior Division:
Buccal (S) Lateral pterygoid (M) Masseter (M) Anterior deep temporal (M) Posterior deep temporal (M) |
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What are the posterior branches of CN V3?
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Posterior Division:
Auriculotemporal (S) Lingual (S) Inferior alveolar (S) (M branch--mylohyoid) |
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What main truck branches of CN V3?
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Meningeal
Medial pterygoid Tensor veli palatini Tensor tympani |
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Parasympathetics for the head will leave the brainstem on what CNs?
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III (pupils)
VII (glands) IX (parotid) |
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What cranial nerves have parasympathetic fibers?
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III, VII, IX, X
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How do parasympathetics reach their targets in the head?
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On cranial nerve V
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Where are the sensory cell bodies of CN V?
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Trigeminal ganglion
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Parasympathetics of CN VII jump on what nerve to supply the sublingual gland?
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Lingual (CN V3)
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What ganglion do parasympathetics from VII synapse on to reach the submandibular and sublingual glands?
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Submandibular ganglion
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How do taste fibers reach the anterior 2/3 of the tongue?
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Special viscerosensory from CN VII travels Chorda tympani to the lingual nerve to reach the tongue.
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Through what opening does the chorda tympani pass?
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petrotympanic fissure
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What CN innervates the stylohyoid and posterior digastric?
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Branchiomotor fibers of CN VII
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Describe the path of parasympathetics to the parotid gland.
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Parasympathetics from IX travel on the lesser petrosal and synapse on the otic ganglion and reach the parotid gland on the auriculotemporal nerve of CN V3.
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What structures pass through the foramina of the cribriform plate?
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Olfactory nerve bundle
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What structures pass through the optic canal?
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Optic nerve (CN II)
Ophthalmic artery |
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What structures pass through the superior orbital fissure?
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CN III
CN IV CN V1 (parts) CN VI Superior ophthalmic vein |
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What structures pass through the foramen rotundum?
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CN V2
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What structures pass through the foramen ovale?
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CN V3
Accessory meningeal artery Lesser petrosal nerve |
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What structures pass through foramen spinosum?
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Middle meningeal artery and vein
Middle meningeal branch of mandibular nerve [CN V3] |
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What structures pass through the carotid canal?
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Internal carotid artery
Internal carotid nerve plexus |
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What structures pass through the internal auditory meatus?
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Facial [CN VII]
Vestibulocochlear [CN VIII] Labyrinthine artery |
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What structures pass through the jugular foramen?
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Glossopharyngeal nerve [CN IX]
Vagus [CN X] Inferior petrosal sinus Sigmoid sinus Posterior meningeal artery |
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What structures pass though the hypoglossal canal?
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Hypoglossal nerve [CN XII]
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What structures pass through the foramen magnum?
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Medulla oblongata
Meninges Vertebral artery Spinal roots of accessory nerves |
