CRANIAL NERVES Flashcards
The trigenminal nerve emerges from _____
mid pons
The sensory ganglion of the trigeminal nerve sit…
.in the floor or middle cranial fossa
What are the 3 branches of the trigeminal nerve
- Ophthalmic
- Maxillary
- Mandibular
The ophthalmic nerve exits the skull through the ____
superior orbital fissure
The maxillary nerve exits the skull through the ____
foramen rotundum
The mandibular nerve exits the skull through the ____
foramen ovale
What information does the trigeminal nerve carry
pain temperature discriminative touch vibration proprioception all for the head motor to the muscles of mastication
which division of the trigeminal nerve carries motor information
mandibular
Where do you find the spinal trigeminal tract and nucleus and what information does it carry
extending from the medulla to the pons carries info on pain and temperature
Where is the chief nucleus of V located - what info does it carry?
in mid pons
Carries info on discriminative touch, vibration
where is the motor nucleus of V located? what does it carry?
In mid pons
Carries motor info to muscles of mastication
Where is the mesencephalic nucleus of V located? what information does it carry?
in Caudal midbrain
Carries proprioception from muscles of mastification
Trigeminal is which cranial nerve
V
What cranial nerve is the Facial nerve
VII
What is the general somatic afferent of the facial nerve
For skin behind ear
What is the special visceral afferent of the facial nerve
Taste from anterior 2/3 of the tongue
What is the special visceral efferent of the facial nerve
Muscles of facial expression
What is the general visceral efferent of the facial nerve
- Sublingual, submandibular glands
- lacrimal gland
Every modality carried by the facial nerve has its own nucleus with the…
rostral medulla and caudal pons
The lower motor neurons of the muscles of facial expression are located in the ____
facial nucleus
The upper motor neurons of the muscles of facial expression are located in the ____
cortex
The LMNs of the upper face receive input from…
Both sides of the cortex BILATERAL
The LMNs of the lower face receive input from…
opposite side of the cortex - CONTRALATERAL
What are the symptoms of a upper motor neuron lesion
Innervation to the lower face is lost, innervation to the upper face stays intact
What are the symptoms of a lower motor neuron lesion
The peripheral nerve carrying fibers to both the upper and lower face is lesioned - results in paralysis of entire side of the face
