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Forensic Anatomy > Facial Nerves > Flashcards

Facial Nerves Flashcards

1
Q

What nerve branch is being indicated in this image?

A

Mandibular branch of trigeminal nerve

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2
Q

Identify nerve A.

A

Lingual nerve

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3
Q

Identify nerve B.

A

Cervical branch of facial nerve

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4
Q

Identify nerve C.

A

Marginal mandibular branches of facial nerve

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5
Q

Identify nerve D.

A

Inferior alveolar nerve

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6
Q

Identify nerve E.

A

Buccal nerve

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7
Q

Identify nerve F.

A

Auriculotemporal nerve

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8
Q

Identify nerve G.

A

Zygomatic branches of facial nerve.

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9
Q

Identify nerve H.

A

Temporal branches of facial nerve

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10
Q

Identify nerve I.

A

Buccal branches of facial nerve

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11
Q

Identify nerve J.

A

Facial nerve (CNVII)

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12
Q

What is the origin of the lingual nerve?

A

Posterior division of the mandibular nerve.

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13
Q

What type of nerve is the lingual nerve?

A

Sensory

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14
Q

What is the target of the lingual nerve?

A

Mucosa of anterior two-thirds of the tongue.

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15
Q

Describe the pathway of the lingual nerve.

A

Originates in infratemporal fossa, deep to lateral pterygoid muscle.
Runs anteroinferiorly between medial pterygoid muscle and mandible, passing into oral cavity between hyoglossus and mylohyoid muscles.
Continues anteriorly, passing medially under submandibular duct to enter the anterolateral surface of the tongue.

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16
Q

Describe the origin of the cervical branch of the facial nerve.

A

Inferior division of facial nerve.

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17
Q

What type of nerve is the cervical branch of the facial nerve?

A

Motor

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18
Q

Describe the pathway of the cervical branch of the facial nerve.

A

Runs inferiorly and slightly anteriorly through the parotid gland down below mandible and into the neck.

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19
Q

What is the target of the cervical branch of the facial nerve?

A

Platysma muscle.

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20
Q

Describe the origin of the marginal mandibular branch of the facial nerve.

A

Inferior division of the facial nerve.

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21
Q

What type of nerve is the marginal mandibular branch of the facial nerve?

A

Motor

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22
Q

What is the target of the marginal mandibular branch of the facial nerve?

A

Muscles of facial expression located in lower portion of face and jaw.

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23
Q

Describe the pathway of the marginal mandibular branch of the facial nerve.

A

Runs inferiorly and anteriorly through the parotid gland to the chin.

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24
Q

Describe the origin of the inferior alveolar nerve.

A

Posterior division of the mandibular nerve.

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25
Q

What type of nerve is the inferior alveolar nerve?

A

Sensory

26
Q

What is the target of the inferior alveolar nerve?

A

Cheek, lips, chin, teeth, gingivae

27
Q

Describe the path of the inferior alveolar nerve/

A

Runs anteroinferiorly between medial pterygoid muscle and mandible.
Passes into ramus of mandible at mandibular foramen.
Continues forward in substance of the mandible to anterior most aspect and emerges as mental nerve.

28
Q

Describe the origin of the buccal nerve.

A

Anterior division of facial nerve.

29
Q

What type of nerve is the buccal nerve?

A

Sensory

30
Q

What is the target of the buccal nerve?

A

Skin of cheek and mucosa deep to the buccinator muscle.

31
Q

Describe the pathway of the buccal nerve.

A

Runs between heads of lateral pterygoid muscle, deep to masseter.
Into cheek, superficial to buccinator muscle.

32
Q

Describe the origin of the auriculotemporal nerve.

A

Posterior division of mandibular nerve.

33
Q

What type of nerve is the auriculotemporal nerve?

A

Sensory

34
Q

What is the target of the the auriculotemporal nerve?

A

Ear, external acoustic meatus, tympanic membrane, temporomandibular joint, and skin over parotid gland and posterior temple.

35
Q

Describe the pathway of the auriculotemporal nerve.

A

Runs posteriorly, splitting around meningeal artery.
Merges as it wraps superiorly behind temporomandibular joint.
Ascends anterior to the ear, continues up to posterior temple.

36
Q

Describe the origin of the zygomatic branches of the facial nerve.

A

Superior division of facial nerve.

37
Q

What type of nerve is the zygomatic branches of the facial nerve?

A

Motor

38
Q

What is the target of the zygomatic branches of the facial nerve?

A

Muscles of facial expression in the middle portion of the face.

39
Q

Describe the pathway of the zygomatic branches of the facial nerve.

A

Runs anteriorly and slightly superiorly, through parotid gland to region of lateral orbit.

40
Q

Describe the origin of the temporal branches of the facial nerve.

A

Superior division of the facial nerve

41
Q

What type of nerve is the temporal branches of the facial nerve?

A

Motor

42
Q

What is the target of the the temporal branches of the facial nerve?

A

Muscles of facial expression in upper portion of face.

43
Q

Describe the pathway of the temporal branches of the facial nerve.

A

Runs anteriorly and superiorly, above zygomatic arch and into temporal region.

44
Q

Describe the origin of the buccal branches of the facial nerve.

A

Inferior division of facial nerve.

45
Q

What type of nerve is the buccal branches of the facial nerve?

A

Motor

46
Q

What is the target of the buccal branches of the facial nerve?

A

Muscles of facial expression in middle portion of face.

47
Q

Describe the pathway of the buccal branches of the facial nerve.

A

Runs anteriorly through parotid gland to region of upper lip.

48
Q

Describe the origin of the facial nerve (CNVII).

A

Ventrolateral pontomedullary junction.

49
Q

What type of nerve is the facial nerve (CNVII)?

A

Motor, sensory, parasympathetic.

50
Q

What are the sensory targets of the facial nerve (CNVII)?

A

Anterior two-thirds of tongue, portions of inner ear and external acoustic meatus

51
Q

What are the motor targets of the facial nerve (CNVII)?

A

Stapedius, posterior belly of digastric, stylohyoid muscles, all muscles of facial expression.

52
Q

What are the parasympathetic targets of the facial nerve (CNVII)?

A

All major glands of face except parotid gland.

53
Q

Describe the pathway of the facial nerve (CNVII).

A

Runs laterally into the facial canal of the temporal bone via internal acoustic meatus.
Exits temporal bone at stylomastoid foramen and terminates into branches.

54
Q

Name nerve A>

A

Hypoglossal nerve

55
Q

Name nerve B.

A

Lingual nerve.

56
Q

What is the origin of the hypoglossal nerve?

A

Medulla oblongata

57
Q

What type of nerve is the hypoglossal nerve?

A

Motor

58
Q

Describe the pathway of the hypoglossal nerve.

A

Passes through hypoglossal canal, travels anteriorly towards tongue

59
Q

What structures does the hypoglossal nerve supply?

A

All muscles of tongue except palatoglossus.

60
Q
A

Forensic Anatomy (46 decks)

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