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WorksheetsDHE 121 Week 14 TMJ
Total questions: 40
Worksheet time: 33mins
The TMJ is the articulation of the (a) bone and the mandible on each side of the head.
The (a) is a smooth, rounded protuberance on the inferior aspect of the zygomatic process and is positioned anterior to the articular fossa
The (a) is a depression on the inferior aspect of the temporal bone. It is posterior to the zygomatic arch and the articular eminence.
The temporomandibular (a) (in blue) protects the joint capsule and keeps it in place during lateral movements.
The (a) protects the following articulating pieces of the TMJ joint: articular eminence, articular fossa, and the mandibular condyle.
The joint capsule has 2 layers. The outer layer is is a firm, fibrous CT supported by the surrounding ligaments associated with the joint.
The inner layer is a (a) membrane, which consists of a thin CT that contains nerves and blood vessels.
The blood vessels in the synovial membrane produce _________ fluid.
_______ fluid is a thick substance that fills the joint, lubricates it, and provides nutrition to the avascular/central part of the joint disc.
(a)
The peripheral border of the TMJ disc has its own (a) , and is completely separate from the central portion of the disc.
(a)
(a)
(a)
(a)
The head and neck of the mandibular condyle undergo:
Endochondral Ossification
Intramembranous Ossification
The mandibular condyle has a:
Periosteum
Mucoperiosteum
What type of cartilage does the TMJ joint have?
(a)
The TMJ joint has _______ articulation.
Unilateral
Bilateral
The 3 working components of the TMJ joint are:
Mandibular condyle
Articular eminence & articular fossa
Articular disc
Postglenoid process
Lateral pterygoid muscle
The superior head of the lateral pterygoid muscle inserts into the pterygoid fovea of the mandible as well as the TMJ disc and (a) .
The inferior head of the lateral pterygoid muscle inserts into the pterygoid (a) of the mandible.
The upper synovial cavity is involved in:
Gliding
Rotation/Hinge
The lower synovial cavity is involved in:
Gliding
Rotation/Hinge
This muscle is responsible for lateral deviation of the mandible.
It is also responsible for protrusion, and depression of the mandible.
Masster
Temoporalis
Medial pterygoid
Lateral pterygoid
The origin of the medial pterygoid muscle's deep head is the:
medial surface of lateral pterygoid plate of sphenoid bone
distal surface of lateral pterygoid plate
articular eminence
The origin of the medial pterygoid muscle's superficial head is the:
medial surface of lateral pterygoid plate of sphenoid bone
distal surface of lateral pterygoid plate
palatine bone of maxillary tuberosity
The insertion of the superficial and deep head of the medial pterygoid muscle is:
medial surface of the ramus and angle of the mandible
maxillary tuberosity
coronoid process
The action of the medial pterygoid muscle is:
elevation of the mandible (during jaw closing)
depression of the mandible (during jaw closing)
medial deviation
The origin of the lateral pterygoid muscle's superior head is the:
Greater wing of sphenoid bone
Medial surface of lateral pterygoid plate
Lateral surface of lateral pterygoid plate
The origin of the lateral pterygoid muscle's inferior head is the:
Greater wing of sphenoid bone
Medial surface of lateral pterygoid plate
Lateral surface of lateral pterygoid plate
Select the actions of the lateral pterygoid muscle.
Slight depression of the mandible (during jaw opening)
Protrudes the mandible (lower jaw forward)
Lateral deviation to one side
Slight elevation of the mandible (during jaw opening)
The temporalis muscle originates on the (a) fossa.
The temporalis muscle inserts on the (a) process of the mandible. (dark blue lines)
The temporalis muscle's action is to ______ and ________ the mandible. (use a comma and a space in your answer)
(a)
The superior head of the masseter muscle originates on the (a) process of maxilla and anterior 2/3 of the zygomatic arch.
The deep head of the masseter muscle originates on the (a) 1/3 and medial surface of zygomatic arch.
The superior head of the masseter muscle inserts on the (a) .
The deep head of the masseter muscle inserts on the (a) .
The masseter muscle's action is to ______ the mandible and ________ the teeth.
elevate, clench
depress, clench
laterally deviate, clench
(a) occurs when the head of each condyle moves too far anteriorly past the articular eminence.
If a patient is in subluxation for a long time, the muscles can become spastic. This is called (a) .
____________ occurs due to wear and tear to the joint. Some causes are malocclusion or the muscles of mastication are not aligned properly.
The bone chips away and tears up the disc.
Osteoarthritis
Trismus
Subluxation
