Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Anatomy
Test 3 Lecture 3
| Question | Answer |
|---|---|
| Muscles of masticaiton and their innervation | Masseter Temporalis Lateral pterygoid Medial pterygoid are innervated by the mandibular division of the trigeminal nerve (V3) |
| The temporal fossa Is bounded superiorly and posteriorly by the _______. Has a floor formed mainly by the_______ | -superior and inferior temporal lines. -parietal bone, greater wing of the sphenoid bone, and squamous part of the temporal bone. |
| The temporal fossa Is covered superficially by _____, which helps give origin to the underlying _______muscle | temporal fascia temporalis |
| where does the temporalis muscle run and what is the function | which has a tendon passing deep to the zygomatic arch to insert into the coronoid process and ramus of the mandible; the temporalis elevates the mandible and its posterior fibers retract the mandible |
| The temporal fossa contains the pterion, which is the junctions of the. the _______ artery often is embedded in bone and may be torn by a skull fracture at pterion to produce an extradural hematoma, which can be fatal within hours | the frontal, parietal, temporal, and greater wing of the sphenoid bones. middle meningeal |
| Other contents of the temporal fossa include the _________nerves and arteries ascending deep to the temporalis muscle | Deep temporal nerve (V3) and deep temporal artery |
| Superficial to the temporal fossa are the ____artery, which is one of the terminal branches of the external carotid artery ________ nerve ascending with the superficial temporal artery and vein | Superficial temporal. Auriculotemporal nerve (V3) |
| The superficial temporal vein Joins the ____vein behind the neck of the mandible to form the _______vein, which descends through the parotid gland | maxillary retromandibular |
| location and boundries of the infratemporal fossa | irregularly shaped space inferior to zygomatic arch boundries: lateral: ramus of the mandible, medial: lateral pterygoid plate, anterior: maxilla, posterior: tympanic portion & styloid process of temporal bone, superior: greater wing of sphenoid bone |
| The ramus of the mandible is covered laterally by the masseter muscle. What is it's function and innervation? | Is innervated by the masseteric nerve (V3) Elevates the mandible |
| The infratemporal fossa communicates Superiorly with ____, foramina ____ and ____ to ____. | temporal fossa and foramina ovale and spinosum with the middle cranial fossa |
| The infratemporal fossa communicates Medially through the ________ to the deep pterygopalatine fossa Anterosuperiorly through the ________ with the orbit | pterygomaxillary fissure. inferior orbital fissure |
| Contents of the infratemporal fossa include the: _____ muscle ________ muscle ______ nerve and ________ nerve _________artery _______plexus of veins | Lateral pterygoid muscle Medial pterygoid muscle Mandibular nerve (V3) and chorda tympani (VII) Maxillary artery Pterygoid plexus of veins |
| 2 Parts and function of the Lateral pterygoid | Lower head that depresses and protrudes mandible; unilateral contraction shifts the chin to the contralateral side; the upper head controls jaw closure to prevent damage to the teeth |
| 2 Parts and function of the Medial pterygoid | Superficial head, Deep head. the deep head and the masseter forms a mandibular sling. superfical and deep head Act to elevate the mandible; it also may assist the lateral pterygoid in protrusion |
| course and innervation of the auriculotemporal nerve | Splits around the middle meningeal artery before exiting the infratemporal fossa and ascending into the temporal region Carries postganglionic parasympathetic fibers from the otic ganglion to the parotid gland |
| lingual nerve Carries ______ information from the _____. Is joined by the _____in the infratemporal fossa | general sensation anterior 2/3 of tongue and floor of mouth. chorda tympani (VII) |
| the chorda tympani carries ________ from the anterior 2/3 of the tongue and_________ to the submandibular ganglion | taste (SVA) preganglionic parasympathetic fibers |
| The inferior alveolar nerve Enters the ______foramen Carries general sensation from the _________. Has the _______ nerve as one terminal branch (carrying sensation from the mucosa and skin of the lower lip and chin) | mandibular mandibular teeth and gingiva mental |
| The maxillary artery Is a terminal branch of the ________ artery. Supplies structures in the _________ (3 areas); it also supplies _____via the middle meningeal artery | external carotid. infratemporal fossa, nasal cavity, and oral cavity. dura mater |
| The pterygoid venous plexus Surrounds the lateral pterygoid muscle and coalesces to form the ______. Has clinically important connections via emissary veins with the ____ possibly causing___ | maxillary vein(s) cavernous sinus at the base of the brain; therefore, something as simple as an abscessed tooth may result in a life-threatening cavernous sinus thrombosis |
| The temporomandibular joint (TMJ) Is a synovial joint formed between the________ and the _________ with an articular disc subdividing the articular cavity into upper and lower joint cavities | head of the mandible. squamous portion of the temporal bone. |
| The temporomandibular joint (TMJ) Exhibits _____movements in the inferior joint cavity and _________movements in the superior joint cavity | hinge gliding |
| what is in between the head of the mandible and the brain? | in the squamus portion of the temporal bone, Only a thin roof of bone in the mandibular fossa separates the joint cavity from the temporal lobe of the brain |
| movements of the TMJ Depression : | Depression of the mandible (opening the jaws) involves Forward gliding of the head of the mandible and articular disc on the articular tubercle Downward rotation of the mandible about a horizontal plane through the head |
| movements of the TMJ Elevation: | Elevation of the mandible (closing the jaws) involves Backward gliding of the head and articular disc on the articular tubercle Upward rotation of the mandible |
| Depression of the mandible is produced by gravity assisted by the ________ and _________ | lateral pterygoid. accessory muscles of mastication (digastric, mylohyoid, and geniohyoid muscles). |
| Elevation of the mandible is produced by the______ (3 muscles) | masseter, temporalis, and medial pterygoid muscles |
| TMJ: Protrusion is performed mainly by the __________ muscle Retraction results mainly from contraction of the _______ Lateral shift results mainly from unilateral _______ and __________ | lateral pterygoid. posterior fibers of the temporalis. lateral pterygoid and medial pterygoid contractions. |
| Problems associated with tmj syndrome | Pain and tenderness with chewing Limited jaw movement Earaches Headaches Dizziness Neck pain and stiffness |
| see slide 31 for referred pain pic |
Created by:
michaelrogers