Cranial cavity Flashcards

Dissection 20

1
Q

What structure transverses the cribriform plate?

A
  1. CNI
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2
Q

What two structures transverse the optic canal?

A
  1. CNII

2. Ophthalmic artery

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3
Q

What 5 structures transverse the superior orbital fissure?

A
  1. CNIII
  2. CNIV
  3. CNV (1)
  4. CNVI
  5. Ophthalmic veins
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4
Q

What structure transverses the foramen rotundum?

A
  1. CNV (2)
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5
Q

What structure transverses the foramen ovale?

A
  1. CNV (3)
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6
Q

What structure transverses the foramen spinosum?

A
  1. Middle meningeal artery
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7
Q

What structure transverses the carotid canal?

A
  1. Internal carotid artery
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8
Q

What 3 structures transverse the jugular foramen?

A
  1. CNIX
  2. CNX
  3. CNXI
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9
Q

What 2 structures transverse the internal acoustic meatus?

A
  1. CNVII

2. CNVIII

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10
Q

What structure transverses the hypoglossal canal?

A
  1. CNXII
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11
Q

What 2 structures transverse the foramen magnum?

A
  1. Spinal cord

2. Vertebral arteries

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12
Q

What structure transverses the incisive canal?

A
  1. Branch of CNV (2)
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13
Q

What structure transverses the greater palatine foramen?

A
  1. Branch of CNV (2)
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14
Q

What structure transverses the stylomastoid foramen?

A
  1. Facial nerve to muscles of facial expression
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15
Q

What are the 3 membranes that line the CNS called? What are they?

A

(meninges)

  1. Dura matter
  2. Arachnoid
  3. Pia matter
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16
Q

From superficial to deep, what are the 8 layers of the head?

A
  1. Skin
  2. Calvaria (skull cap)
  3. Epidural space (site of epidural hematoma)
  4. Dura matter
  5. Subdural space (site of subdural hematoma)
  6. Arachnoid
  7. Subarachnoid (contains CSF and cranial nerves)
  8. Pia matter
  9. Brain
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17
Q

What are the fibrous joints of the skull called?

A

Sutures

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18
Q

How do intracranial and extracranial veins communicate? Why is this significant?

A

Emissary veins (way of spreading infection to central nervous system)

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19
Q

What are the clinical implications of emissary veins?

A
  1. Valve-less (blood can flow to and from intracranial sinuses)
  2. Source of infection of CNS (thrombosis, meningitis)
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20
Q

How does the olfactory nerve gain access to the nasal mucosa?

A

Cribriform foramina

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21
Q

What is an alternative name for CNI?

A

Olfactory nerve

22
Q

What is an alternative name for CNV

A

Trigeminal nerve

23
Q

What are the three branches of CNV?

A
  1. Ophthalmic
  2. Maxillary
  3. Mandibular
24
Q

How many blood supplies are their to the cranial cavity? What are they?

A

(2)

  1. Brain
  2. Dura
25
Q

In what layer of the head do CNs travel?

A

Subarachnoid space

26
Q

What is an alternative name for CNII?

A

Optic nerve

27
Q

What is an alternative name for CNIII?

A

Oculomotor nerve

28
Q

A patient presents with a drooping upper eyelid. What could this indicate?

A

CNIII lesion

29
Q

What is an alternative name for CNIV?

A

Trochlear nerve

30
Q

What is an alternative name for CNVI?

A

Abducens nerve

31
Q

What is an alternative name for CNVII?

A

Facial nerve

32
Q

What is an alternative name for CNVIII?

A

Vestibulocochlear nerve

33
Q

What is an alternative name for CNIX?

A

Glossopharyngeal nerve

34
Q

What is an alternative name for CNX?

A

Vagus nerve

35
Q

What is an alternative name for CNXI?

A

Accessory nerve

36
Q

What is an alternative name for CNXII?

A

Hypoglossal nerve

37
Q

What 6 vessels form the circle of willis?

A
  1. Anterior cerebrals
  2. Anterior communicating
  3. Middle cerebrals
  4. Posterior communicatings
  5. Posterior cerebrals
  6. Basilar
38
Q

What are the 2 components of the medulla oblongata?

A
  1. Pyramids

2. Olives

39
Q

What is a cranial nerve name mnemonic?

A

On occasion our trusty truck acts funny very good vehicle anyhow

40
Q

What is a cranial nerve fiber-type mnemonic?

A

Some say marry money but my brother says big brains matter more

41
Q

What is the function of CNI?

A

Smell

42
Q

What is the function of CNII?

A

Vision

43
Q

What is the function of CNIII?

A

All eye movements except:

  1. looking side to side
  2. Looking down and in
44
Q

What is the function of CNIV?

A

Looking down and in

45
Q

What is the function of CNV?

A
  1. Sensory of forehead and cheek

2. Clenching teeth

46
Q

What is the function of CNVI?

A

Looking side to side

47
Q

What is the function of CNVII?

A
  1. Taste (anterior 2/3 of tongue)

2. Smiling

48
Q

What is the function of CNVIII?

A
  1. Hearing

2. Balance

49
Q

What is the function of CNIX?

A

Taste (posterior 1/3 of tongue)

50
Q

What is the function of CNX?

A

Arrest and digest

51
Q

What is the function of CNXI?

A
  1. Shoulder shrug (trapezius)

2. Neck movement (sternocleidomastoid)

52
Q

What is the function of CNXII?

A

Tongue movement