Cranial nerves Flashcards
How many cranial nerves are there?
12 pairs
How do the cranial nerves relate to the nervous system?
Cranial neves 1-2 are part of the central nervous system
Cranial nerves 3-12 are part of the peripheral nervous system
What do the cranial nerves originate from?
Forebrain
Brainstem
How are the origins of the cranial nerves organised?
Rostral to caudal
but at irregular intervals
Which cranial nerves originate from the forebrain?
Cranial nerves 1-2
Which cranial nerves originate from the brainstem?
Cranial nerves 3-12
Where in the brainstem do cranial nerves 3-12 originate from?
Cranial nerves 3-4 arise from the midbrain
Cranial nerves 5-8 arise from the pons
Cranial nerves 9-12 arise from the medulla
What are the different types of cranial nerves, in terms of their function?
Only sensory
Only motor
Both sensory and motor
What are the types of senses that the cranial nerves carry?
Special sensory
General sensory
What is meant by special sensory?
Vision, smell, taste, hearing
What is meant by general sensory?
Pain, temperature, pressure
What do the cranial nerves supply?
Structures in the head and neck
Which cranial nerve has the longest intracranial route?
CN4 trochlear nerve
