Term
| What are the osteokinimatic motions of the jaw? |
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Definition
Elevation/Depression
Retrusion/Protrusion
Lateral Deviation
Closing the mouth is elevation
Opening the mouth Depression
Jutting out the jaw is protrusion, return to normal is retrusion
Lateral deviation is side to side motion as in chewing |
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Term
| The TMJ is not a true hinge joint only hinge like. Why? |
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Definition
| The TMJ joint allows for some gliding motion, yet it's primary motion is hinge like. The TMJ is a synovial joint and has a joint capsule. |
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Term
| When there is a low level of activity in the Temporalis muscle what position will the TMJ and Jaw be in? |
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Definition
Resting position. The mouth is relaxed, closed and the teeth are not touching.
The mouth should be able to open far enough to put two to three fingers between the upper and lower teeth. |
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Term
| What bones make up the TMJ joint? |
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Definition
The mandible (which has two condyles) and two temporal bones which each have an Articular Fossa.
Although the mandible is only one bone, each of the condyles articulating with an articular fossa of a Temporal bone. Each is considered it's own joint. |
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Term
Be able to visulize the following bony landmarks of the Mandible.
Condyle
Neck
Notch
Coronoid process
Ramus
Angle
Body |
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Definition
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Term
The articular portion of the temoral bone is made up of the concave articular fossa in the middle with the convex articular tubercle located ________ and the convex postglenoid tubercle located _______.
page 171 |
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Definition
Anteriorly
Posteriorly
The articular portion of the temoral bone is made up of the concave articular fossa in the middle with the convex articular tubercle located Anteriorly and the convex postglenoid tubercle located Posteriorly.
Page 172 13-6 |
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Term
| When the mandible is depressed the condyle of the mandible rests under what bony landmark? |
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Definition
Articular tubercle
Page 171 |
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Term
| The articular fossa is also called what? |
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Definition
| The mandibular fossa. But it's on the temporal bone. |
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Term
| The zygomatic arch is made up of what two bones? |
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Definition
The zygomatic process of the temporal bone (posterior)
the temporal process of the zygomatic bone (anterior) |
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Term
| The temporal fossa includes which bones? |
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Definition
Temporal, Frontal, Sphenoid, Parietal, and zygomatic.
The picture on 173 does not show how the zygomatic is part of the fossa. |
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Term
| The hyoid bone is at the same level as which cervical vertebra? |
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Definition
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Term
| The medial pterygoid attaches(origin) where on the maxilla? |
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Definition
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Term
| What nerve innervates the Temporalis, Masseter, medial pterygoid, and lateral pterygoid muscles? |
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Definition
| Trigeminal nerve (cranial nerve V) |
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Term
| Name two muscles that attach to the mastoid process of the temporal bone. |
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Definition
Diagastric
Sternocleidomastoid |
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Term
| The lateral pterygoid plate is part of what bone? Name two muscles that attach here. |
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Definition
Sphenoid bone.
Lateral and Medial pterygoid muscles |
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Term
| The lateral ligament is also known as the ___________ |
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Definition
| Temporomandibular ligament. |
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Term
| The function of the lateral ligament is ___________________ |
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Definition
It limits downward, posterior, and lateral motions of the mandible.
Anteriorly it attaches on the neck of the mandibular condyle and disk.
superiorly it attaches to Articular tubercle of the temporal bone
page 174 fig 13-10
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Term
| The sphenomandibular ligament functions to ____________________ |
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Definition
suspends the mandible and limits excessive anterior motion.
the spenomandibular ligament attaches to the spine of the spenoid bone.
It attaches to the middle of the anterior (internal) surface of the ramus of the mandible.
13-10 p 174 |
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Term
| The Stylomandibular ligaments function is ______________ |
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Definition
limit excessive anterior motion.
It attaches on the styloid process and the posterior inferior border of the ramus of the mandible. |
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Term
| The TMJ is a snyovial joint and has a joint capsule. it attaches superiorly to the articular tubercle and borders of the fossa of the temporal bone. inferiorly it attaches to the ________________ |
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Definition
| neck of the condyle of the mandible. |
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Term
| The articular disk of the TMJ divides the joint space into two separate compartments. The disk _______ in an anterior/posteror direction on the condyle. The condyle then _______ downward over the articular eminence.(tuberosity) |
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Definition
rotates.
Glides.
174 13-13 |
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Term
| Opening the mouth involves two motions. They are |
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Definition
anterior rotation of the mandibular condyle on the disk
gliding of the disk and condyle forward and downward under the articular tubercle.
Closing the mouth is just the opposite. it involvs gliding posterior and superiorly which rotates the condyle posterior on the disk. |
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Term
| Elevation/depression occur in what plane? |
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Definition
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Term
Lateral deviation of the mandible occurs in what plane?
It involves one condyle rotating in the articular fossa while the other condyle ______________ |
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Definition
horizontal.
glides/slides forward.
Lat dev to R R condyle rotates/spins and the L glides/slides
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Term
| The Temporalis muscle OIAN |
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Definition
O Temporal fossa
I Coronoid process and ramus of mandible
A Bilaterally: elevation, retrusion
A Unilaterally: Ipsilateral lateral deviation
N Trigeminal V |
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Term
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Definition
O Zygomatic arch of temporal bone and temporal process of zygomatic bone
I Angle of the ramus and coronoid process of mandible
A Bilateral: Elevation
Unilateral: ipsilateral lateral deviation
N trigeminal V |
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Term
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Definition
O Lateral pterygoid plate and greater wing of the sphenoid bone
I Mandibular condyle and articular disk
A Bilaterally: depression, protrusion
A Unilaterally: contralateral lateral deviation
N Trigeminal V |
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Term
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Definition
O Lateral pterygoid plate of the sphenoid bone and tuberosity of the maxilla
I Ramus and angle of the mandible
A Bilaterally: elevation, protrusion
Unilateraly: contralateral lateral deviation
N Trigeminal V
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Term
| The suprahyoid muscles are located above the hyoid bone. They elevate the hyoid. Name them |
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Definition
Diagastric
mylohyoid
geniohyoid
stylohyoid
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Term
| The infrahyoid muscles are below the hyoid bone and their function is to depress the hyoid bone. name them |
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Definition
sternothyroid,
thyrohyoid
sternohyoid
omohyoid |
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Term
| Which muscles open the mouth? |
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Definition
| Lateral pterygoid - depression of mandible |
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Term
| Which muscles close the mouth? |
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Definition
Temporalis
masseter
medial pterygoid |
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Term
| When laterally deviating your jaw to the right which muscles are you using and on what side? |
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Definition
Right Temporalis - Ipsilateral lateral deviation
Left Medial and lateral pterygoids - contralateral lateral deviation
page 179 |
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Term
| If the trigeminal nerve were damaged the motor functions of the mouth would be effected. What sensory area would be effected? |
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Definition
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Term
| What are the four ligaments of the TMJ? |
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Definition
Tempomandibular also known as Lateral ligament
Sphenomandibular
stylomandibular
stylohyoid |
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Term
| The articular disk is more firmly attached to the ______ than the _________ |
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Definition
Mandible
temporal bone
This allows the disk to move forward when the mouth opens it returns posteriorly when the mouth closes. It moves forward with the mandibular condyle |
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Term
| During protrusion/retrusion the mandible move forward but there is no ________ |
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Definition
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