Head I

Question 1

Which bones of the skull are paired and which are unpaired?

Answer 1

Paired: Parietal and Temporal
Unpaired: Ethmoid, Sphenoid, Frontal, and Occipital

Question 2

Which bones contribute to the bony orbit (orbital cavity)?

Answer 2

7 bones
Sphenoid, Frontal, Ethmoid, Lacrimal, Palatine, Maxillary, Zygomatic

Question 3

Name the structures that pass through the following cranial foramina:

• Cribriform plate:
• Optic Canal:
• Superior orbital fissure:
• Foramen rotundum:
• Foramen ovale:
• Foramen spinosum:
• Internal acoustic meatus:
• Jugular foramen:
• Foramen magnum:
• Hypoglossal canal:
• Stylomastoid foramen:

Answer 3

• Olfactory nerve (CN1)
• Optic nerve (CN2)
• Ophthalmic division of Trigeminal nerve (CN5), Oculomotor nerve (CN3), Trochlear nerve (CN4), Abducent nerve (CN6)
• Maxillary division of the Trigeminal nerve (CN5)
• Mandibular division of Trigeminal nerve (CN5)
• Middle meningeal artery
• Facial nerve (CN7), Vestibulocochlear nerve (CN8)
• Glossopharyngeal nerve (CN9), Vagus nerve (CN10), Accessory nerve (CN11), Internal jugular vein
• Spinal cord, vertebral arteries
• Hypoglossal nerve (CN12)
• Internal carotid artery
• Facial nerve (CN7)