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Human Anatomy > Unit 2- Skull > Flashcards

Unit 2- Skull Flashcards

1
Q

What does neurocranium refer to?

A

cranial vault

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2
Q

What is the purpose of the Neurocranium?

A

-protects brain
-houses the organs of hearing and balance
-site of attachment for head and neck muscles

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3
Q

What makes up the Neurocranium?

A

4 singular bones (Frontal, Ethmoid, Sphenoid, & Occipital)
2 sets of paired bones (Temporal & Parietal)

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4
Q

What is the Calvarium?

A

domelike roof of neurocranium

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5
Q

What makes up the Calvarium?

A
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6
Q

What is a fontanelle?

A

membranous interval at the margins of cranial bones in fetal skull

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7
Q

What type of person has a fontanelle?

A

fetus/ infant

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8
Q

What makes it a supraorbital notch vs supraorbital foramen?

A

A notch is not closed
A foramen is a closed circle

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9
Q

What is described as a boomerang?

A

Inferior orbital fissure and Superior orbital fissure

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10
Q

What is the feature of a supraorbital notch/ foramen?

A

passage for Branch of Cranial Nerve V1 (Supraorbital Nerve)

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11
Q

What is the feature of a infraorbital notch/ foramen?

A

passage for Branch of Cranial Nerve V2 (Infraorbital Nerve)

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12
Q

What is the feature of Superior orbital fissure?

A

passage for Cranial Nerves III, IV, V1, and VI

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13
Q

What is the feature of Inferior orbital fissure?

A

passage for Branch of Cranial Nerve V2 (Infraorbital Nerve)

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14
Q

What is the feature of Nasolacrimal Canal?

A

passage for Nasolacrimal duct

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15
Q

What combined makes the zygomatic arch?

A

Zygomatic process (of temporal bone) + Temporal process (of zygomatic bone)

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16
Q

Why is the Carotid Canal important?

A

Passage for Internal Carotid artery

17
Q

Why is the Stylomastoid Foramen important?

A

Passage for Cranial nerve VII (Facial Nerve)

18
Q

Why is the Occipital Condyle important?

A

Articulates with first cervical vertebrae (atlas)

19
Q

Why is the Mastoid Process important?

A

Attachment of SCM

20
Q

Why is the Mandibular Fossa important?

A

Articulates with the mandible (through the condylar process)

21
Q

Why is the Cribriform Plate important?

A

passage for CN I (Olfactory Nerves)

22
Q

Why is the Optic Canal important?

A

passage for CN II (Optic Nerve)

23
Q

Why is the Superior Orbital Fissure important?

A

passage for Cranial Nerves III, IV, V1, and VI

24
Q

Why is the Foramen Rotundum important?

A

passage for CN V2 (Maxillary Branch of Trigeminal N.)

25
Q

Why is the Foramen Ovale important?

A

passage for CN V3 (Mandibular Branch of Trigeminal N.)

26
Q

Why is the Foramen Spinosum important?

A

passage for Middle Meningeal Vessels

27
Q

Why is the Foramen Lacerum important?

A

NOT ACTUALLY IMPORTANT, IT’S JUST THERE

passage for NOT a true opening - filled with cartilage when alive

28
Q

Why is the Internal Acoustic Meatus important?

A

passage for CN VIII (Vestibulocochlear)

29
Q

Why is the Jugular Foramen important?

A

passage for Internal Jugular V., Cranial Nerves IX, X & XI

30
Q

Why is the Hypoglossal Canal important?

A

passage for CN XII (Hypoglossal N.)

31
Q

Why is the Foramen Magnum important?

A

passage for Vertebral Arteries, Spinal Cord, CN XI (Accessory N.)

32
Q

Why is the Crista Galli important?

A

Attachment site for Falx Cerebri

33
Q

Why is the Sella Turcica important?

A

Houses Pituitary Gland

34
Q

Why is the Petrous Portion (of Temporal Bone) important?

A

Protects structures of inner ear

35
Q

What two things make up a nasal septum?

A

perpendicular plate + vomer bone

36
Q

Why is the Condylar Process important?

A

Articulates with mandibular fossa

37
Q

Why is the Mental Foramen important?

A

Passage for mental nerve and vessels

38
Q

Why is the mandibular foramen important?

A

Passage for inferior alveolar nerve

(where you are injected with anesthetic during dental procedures)

Human Anatomy (9 decks)

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