Nerves Flashcards
Symptoms of Bell’s Palsy
Facial paralysis Smoothing of facial wrinkles Drooling Inability to completely close eye Dry eye
What is Bell’s Palsy?
Temporary paralysis of CN VII due to swelling of the nerve in the facial canal of the temporal bone
What does the central nervous system consist of?
The brain and the spinal cord
What does the peripheral nervous system consist of?
Cranial and spinal nerves
What is CN I and where does it exit the cranial cavity?
The olfactory nerve
At the cribriform plate
What is CN II and where does it exit the cranial cavity?
The optic nerve
Optic canal
What is CN III and where does it exit the cranial cavity?
The oculomotor nerve
Superior orbital fissure
What is CN IV and where does it exit the cranial cavity?
The trochlear nerve
Superior orbital fissure
What is CN V and where does it exit the cranial cavity?
The trigeminal nerve
V1: superior orbital fissure
V2: foramen rotundum
V3: foramen ovale
What is CN VI and where does it exit the cranial cavity?
The abducens nerve
The superior orbital fissure
What is CN VII and where does it exit the cranial cavity?
Internal acoustic meatus
What is CN VIII and where does it exit the cranial cavity?
Vestibulocochlear nerve
Internal acoustic meatus
What is CN IX and where does it exit the cranial cavity?
Glossopharyngeal nerve
The jugular foramen
What is CN X and where does it exit the cranial cavity?
The vagus nerve
Jugular foramen
What is CN XI and where does it exit the cranial cavity?
The spinal accessory nerve
Jugular foramen
What is CN XII and where does it exit the cranial cavity?
The hypoglossal nerve
Hypoglossal canal