N16 cranial nerve nuclei Flashcards
All cranial nerves exit ventrally except for one?
IV - trochlear nerve
name the 3 motor componenents
- Somatic motor
- visceral motor (parasympathetic)
- Branchio motor
list the cranial nerves which are somatic motor?
- oculomotor
- trochlear
- abducens
- hypoglossal
which somatic nerves are found in the midbrain?
oculomotor
trochlear
which somatic motor nerves are found in the pons?
abducens
hypoglossal
which muscles does the oculomotor nerve innervate?
skeletal muscles of levator palprebal
AO3 - SR, MR, IR
inferior oblique muscle
what is special about the trochlear nerve?
only cranial nerve to exit dorsally as all other exit ventrally and it crosses the midline
which muscles does the trochlear (IV) nerve supply?
Superior oblique
where is the trochlear nucleus found?
midbrain
where is the abducens found and what muscles do they innervate?
pons
Lateral rectal muscle of ipsilateral orbit
where is the hypoglossal nerve found and where is the nucleus located?
nerve is found in pons and nucleus is located in medulla (long thin nucleus)
which muscles does the hypoglossal nerve (somatic motor) innervate?
supplies 3/4 extrinsic muscles of the tongue
- genioglossus, hyoglossus and styloglossus
and all intrinsic muscles
what effect does left sided hypoglossal nerve palsy have?
patient complained of progressive difficulty with speech
recap the somatic motor cranial nerves?
III
IV
VI
XII
Which muscles are the visceral motor parasympathetic related to?
Glands/smooth muscle
which nerve is associated with the edinger-westphal nucleus (parasympathetic)?
oculomotor
where is the edinger westphal nucleus found?
midbrain
which muscles are associated with the edingerwestphal nucleus (parasympathetic)?
pupillary sphincter
ciliary muscle
list the 4 parasympathetic nuclei?
- edinger-westphal
- sup. salivatorynucleus (VII)
- inf. salivatory nucleus (IX)
- dorsal nucleus of vagus (X)
where is the sup.salivatory nucleus found and what cranial nerve is associated with it?
pons and facial nerve
where is the inferior salivatory nucleus found and what nerve is it associated with?
medulla
IX
where is the dorsal nucleus of vagus located and what nerve is associated with?
medulla and vagus
which nuclei and cranial nerve are associated with the pupillary sphincter and ciliary muscle?
III
edinger-westphal nucleus
para
which nuclei and cranial nerve are associated with subman/ling and pterygopalatine?
sup. salivatory nucleus
VII
para
which nuclei and cranial nerve are assoicated with the parotid?
inf. salivatory nucleus (IX)
para
which nuclei is associated with glands + smooth muscle ?
dorsal nucleus of vagus (X)
list the nerves associated with the branchiomotor
trigeminal facial glossopharyngeal vagus cranial acessory
where is the trigeminal found and what muscles does it innervate?
pons jaw, t.tymp t.palatini mylohyoid ant belly digastric
where is the facial nerve found and list the muscles it innervates
pons
facial expression/ stapedius
where is glossopharyngeal IX located and what is it involved in?
medulla
swallowing
where is the cranial accessory (XI) and what is it involved in?
medulla and raising the palate up and taking
which tract has a similiar function as corticospinal but provides motor input for the nuclei serving cranial nerves 3-12 except 8?
corticobulbar tract
