Cranial cavity Flashcards
Dissection 20
What structure transverses the cribriform plate?
- CNI
What two structures transverse the optic canal?
- CNII
2. Ophthalmic artery
What 5 structures transverse the superior orbital fissure?
- CNIII
- CNIV
- CNV (1)
- CNVI
- Ophthalmic veins
What structure transverses the foramen rotundum?
- CNV (2)
What structure transverses the foramen ovale?
- CNV (3)
What structure transverses the foramen spinosum?
- Middle meningeal artery
What structure transverses the carotid canal?
- Internal carotid artery
What 3 structures transverse the jugular foramen?
- CNIX
- CNX
- CNXI
What 2 structures transverse the internal acoustic meatus?
- CNVII
2. CNVIII
What structure transverses the hypoglossal canal?
- CNXII
What 2 structures transverse the foramen magnum?
- Spinal cord
2. Vertebral arteries
What structure transverses the incisive canal?
- Branch of CNV (2)
What structure transverses the greater palatine foramen?
- Branch of CNV (2)
What structure transverses the stylomastoid foramen?
- Facial nerve to muscles of facial expression
What are the 3 membranes that line the CNS called? What are they?
(meninges)
- Dura matter
- Arachnoid
- Pia matter
From superficial to deep, what are the 8 layers of the head?
- Skin
- Calvaria (skull cap)
- Epidural space (site of epidural hematoma)
- Dura matter
- Subdural space (site of subdural hematoma)
- Arachnoid
- Subarachnoid (contains CSF and cranial nerves)
- Pia matter
- Brain
What are the fibrous joints of the skull called?
Sutures
How do intracranial and extracranial veins communicate? Why is this significant?
Emissary veins (way of spreading infection to central nervous system)
What are the clinical implications of emissary veins?
- Valve-less (blood can flow to and from intracranial sinuses)
- Source of infection of CNS (thrombosis, meningitis)
How does the olfactory nerve gain access to the nasal mucosa?
Cribriform foramina