Cranial Nerves (3) Flashcards
What is the upper motor neuron tract that supplies cranial nerves?
Corticobrainstem
What type of function is the corticobrainstem?
Only motor
Where on the homunculus is the face represented?
Lateral
What is the common function of cranial nerves 3,7,9,10?
Autonomic function
What are the cranial nerves associated with the eye structures?
Cranial nerve 4- superior oblique
Cranial nerve 6- Lateral rectus
Cranial nerve 3- inferior oblique, medial rectus, superior rectus, inferior rectus
What are the main functions of cranial nerves 3,4,6?
Motor to the extraocular muscles
What are the cranial nerves responsible for assisting with chewing and swallowing?
5,7,9,10,12
What does cranial nerve 5 do?
Muscles of mastication
What does cranial nerve 7 do?
Salivation (sublingual and submandibular glands)
What does cranial nerve 9 do?
Swallowing (parotid gland)
What does cranial nerve 10 do?
Swallowing
What does cranial nerve 12 do?
Tongue
What are the functions of the tongue?
Taste
Speech
Pain
What are the 3 divisions of cranial nerve 5 on the face?
Ophthalmic (pain)
Maxillary (light touch)
Mandibular (temp)
What structures go through the carotid triangle?
Carotid artery and vagus nerve
What cranial nerves emerge from the midbrain?
1,2,3 and 4
What cranial nerve emerges from the pons?
5
What cranial nerves emerge from the pontomedullary junction?
6,7 and 8
What spinal nerves emerge from the medulla?
9,10 and 12
What is the sensory of cranial nerve 5?
Somatosensation
What is the sensory of cranial nerves 7 and 9?
Special
What is the sensory of cranial nerve 10?
Somatosensation/special
Which cranial nerves are autonomic?
3,7,9, and 10
What is the function of cranial nerve 3?
Innervates superior rectus, inferior rectus, medial rectus, inferior oblique, and levator palpebrae
What is the parasympathetic function of cranial nerve 3?
Pupil constriction and lens accomodation
What is the function of cranial nerve 4?
Innervates superior oblique
What is the function of cranial nerve 5?
Somatosensation to face, mouth, part of tongue, teeth, cornea
Muscles of mastication
What is the function of cranial nerve 6?
Innervates lateral rectus
What is the function of cranial nerve 7?
Motor to muscles of facial expressions, closes eyes
taste for anterior 2/3 of tongue
Tears and salvation
What is the function of cranial nerve 9?
Taste to posterior 1/3 of tongue
Motor to 1 muscle for swallowing
Somatosensation from posterior tongue, pharynx, and middle ear
Visceral afferent from carotid body and sinus
What is the function of cranial nerve 10?
Motor to muscles of swallowing and speech
Somatosensation to part of ear and pharynx
Regulates visceral function and carries visceral afferent information
What is the function of cranial nerve 11?
Motor to SCM and upper traps
What is the function of cranial nerve 12?
Motor to muscles of tongue
What is the special sense in cranial nerve 1?
Smell
What is the special sense in cranial nerve 2?
Vision
What is the special sense in cranial nerve 7?
Taste on anterior 2/3 of tongue
What is the special sense in cranial nerve 8?
Vestibular sensation from semicircular canals and otholith organ (hearing)
What is the special sense in cranial nerve 9?
Taste on posterior 1/3 of tongue
What is the special sense in cranial nerve 10?
Small part in taste
