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Anatomy > Ch 14 Temporomandibular joint > Flashcards

Ch 14 Temporomandibular joint Flashcards

1
Q

Temporomandibular joint motion in terms of plane and axis and range of normal motion at this joint

A

mandibular depression, elevation, lateral deviation, protrusion, retrusion

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2
Q

Key bones and bony landmarks of TMJ

A

Mandibular angle, body of mandible, mandibular condyle, coronoid process, mental spine, neck, notch, ramus, mastoid process, articular tubercle, mandibular fossa, styloid process, external auditory meatus, zygomatic process

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3
Q

Primary ligaments of TMJ

A

lateral ligament, temporomandibular ligament, sphenomandibular ligament, stylomandibular ligament, stylohyoid ligament

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4
Q

Joint of TMJ

A

joint capsule, articular disk pg 228

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5
Q

Temporalis muscle

A

O- temporal fossa
I- coronoid process and ramus of mandible
A- Bilaterally: elevation, retrusion, Unilaterally: ipsilateral lateral deviation
N- trigeminal nerve (CNV)

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6
Q

Masseter muscle

A

O- zygomatic arch of temporal bone & zygomatic process of maxilla
I- Angle of ramus and coronoid process of mandible
A- Bilaterally: elevation, Unilaterally: ipsilateral lateral deviation
N- trigeminal nerve (CNV)

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7
Q

Medial pterygoid

A

O- lateral pterygoid plate of sphenoid & tuberosity of maxilla
I- ramus & angle of mandible
A- Bilaterally: elevation, protrusion, Unilaterally: contralateral lateral deviation
N- trigeminal (CNV)

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8
Q

Lateral pterygoid

A

O- Lateral pterygoid plate & greater wing of sphenoid
I- mandibular condyle & articular disk
A- Bilaterally: depression, protrusion, Unilaterally: contralateral lateral deviation
N- trigeminal (CNV)

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9
Q

Suprahyoid muscles

A

group of muscles located above the hyoid bone, they connect the hyoid bone to the skull primarily to the mandible; they assist in depressing the mandible, includes mylohyoid, geniohyoid, stylohyoid, and digastric

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10
Q

Mylohyoid muscle

A

O- Inferior medial mandible
I- Hyoid
A- assists in depressing mandible
N- trigeminal (CNV)

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11
Q

Geniohyoid muscle

A

O- Mental spine
I- Hyoid
A- Assists in depressing mandible
N- C1 via hypoglossal nerve (CN XII)

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12
Q

Stylohyoid muscle

A

O- Styloid process of temporal bone
I- Hyoid
A- assists in depressing mandible
N- facial nerve (CN VII)

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13
Q

Digastric muscle

A

O- Anterior: internal inferior mandible, Posterior: mastoid process
I- via pulleylike tendon to hyoid
A- assists in depressing mandible
N- trigeminal nerve (CN V), facial nerve (CN VII)

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14
Q

Infrahyoid muscles

A

located below hyoid bone and serve to depress it, stabilize the hyoid bone allowing the suprahyoid muscles to depress the mandible, includes sternohyoid, sternothyroid, thyrohyoid, and omohyoid; lesion to C1 to C3 would paralyze these muscles, but lesion to hypoglossal wouldn’t

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15
Q

Sternohyoid muscle

A

O- medial end of clavicle, sternoclavicular ligament, and manubrium of sternum
I- inferior border of hyoid bone
A- stabilize hyoid
N- C1 to C3 via hypoglossal

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16
Q

Sternothyroid muscle

A

O- manubrium of sternum and cartilage first rib
I- thyroid cartilage
A- stabilize hyoid
N- C1 to C3 via hypoglossal

17
Q

Thyrohyoid muscle

A

O- thyroid cartilage
I- inferior border of hyoid bone
A- stabilize hyoid
N- C1 to C3 via hypoglossal

18
Q

Omohyoid muscle

A

O- superior border of the scapula
I- inferior border of hyoid bone
A- stabilize hyoid
N- C1 to C3 via hypoglossal

19
Q

Prime movers of TMJ elevation

A

temporalis, masseter, medial pterygoid

20
Q

Prime movers of TMJ depression

A

lateral pterygoid

21
Q

Prime movers of TMJ protrusion

A

lateral pterygois, medial pterygoid

22
Q

Prime movers of TMJ retrusion

A

temporalis (posterior)

23
Q

Prime movers of TMJ ipsilateral lateral deviation

A

temporalis, masseter

24
Q

Prime movers of TMJ contralateral lateral deviation

A

medial pterygoid, lateral pterygoid

25
Q

Temporomandibular dysfunction

Clicking

A
  • almost always involves treatment of the cervical region as well
  • can occur when the articular disk is not positioned correctly
26
Q

Functional impact of posture on TMJ muscles: Forward head

A

suprahyoids and infrahyoids on stretch, causes mandible to be in a position of retrusion

27
Q

hard palate

soft palate

A
  • suckle, feeding, speech

- closes nasal passageway

28
Q

epiglottis

A

closes trachea and prevents aspiration

29
Q

pharynx

A

throat, passageway (superior to larynx), divided into 3 parts

30
Q

larynx

A

voicebox

31
Q

esophagus

A

brings food and drink to stomach, passageway from throat to stomach

Anatomy (6 decks)

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