Cranial Nerve Locations (ganglia, route, autonomic fibers, etc.) Flashcards
Location of neuron cell bodies:
Motor neurons of CN VII
Pons - Motor nucleus of VII
Cranial Nerves with Autonomic function
Location of postganglionic neuron cell bodies:
CN III
Ciliary ganglion (attached to V1)
Cranial Nerves with Autonomic function
Location of postganglionic neuron cell bodies:
CN VII to salivary glands (except parotid gland)
Submandibular ganglion (attached to V3)
What is the route of the preganglionic fibers of CN X?
With CN X.
Location of neuron cell bodies:
Motor neurons of CN IX
Medulla - nucleus ambiguus
Location of neuron cell bodies:
Somatic sensory neurons of CN X
Superior ganglion of X
Target organ of autonomic fibers from CN IX?
Parotid gland –> salivation
Location of neuron cell bodies:
CN IV
Lower midbrain - trochlear nucleus
Which cranial nerve passes between posterior cerebral and superior cerebellar arteries?
HINT: aneurysms of these arteries injures this nerve
CN III
Target organ of autonomic fibers from CN III?
Sphincter pupillae m. –> Pupil constriction
Ciliary m. –> lens accommodation for near vision
Location of neuron cell bodies:
Motor neurons of CN X
Medulla - nucleus ambiguus
(some are “cranial roots” previously associated with CN XI)
What is the route of the postganglionic fibers of CN VII to lacrimal gland?
Via zygomaticotemporal n. (V2) and lacrimal n. (V1)
Cranial Nerves with Autonomic function
Location of preganglionic neuron cell bodies:
CN III
Upper midbrain - Edinger-Westphal nucleus
What is the route of the preganglionic fibers of CN III?
They travel with CN III.
Location of neuron cell bodies:
CN XII
Medulla - hypoglossal nucleus
Location of neuron cell bodies:
CN XI
Spinal cord - anterior horn of cervical region
Location of neuron cell bodies:
Sensory neurons of CN VII
Geniculate ganglion
Location of neuron cell bodies:
CN VI
Pons - abducent nucleus
Location of neuron cell bodies:
Sensory neurons of Trigeminal Nerve
Trigeminal (semilunar) ganglion
Cranial Nerves with Autonomic function
Location of preganglionic neuron cell bodies:
CN X
Medulla - Dorsal motor nucleus of X
Location of neuron cell bodies:
CN I
Olfactory epithelium
Cranial Nerves with Autonomic function
Location of preganglionic neuron cell bodies:
CN VII to lacrimal gland
Pons - superior salivatory nucleus
What is the route of the postganglionic fibers of CN III?
Travel with short ciliary nerves
Cranial Nerves with Autonomic function
Location of postganglionic neuron cell bodies:
CN X
Autonomic ganglia near or within walls of target organ (e.g. esophagus)
Location of neuron cell bodies:
CN III
Upper midbrain - oculomotor nucleus
Cranial Nerves with Autonomic function
Location of postganglionic neuron cell bodies:
CN VII to lacrimal gland
Pterygopalatine ganglion (attached to V2)
Which cranial nerve takes the following route?
- emerges near mediane plane at junction of pons & medulla
- passes through cavernous sinus & superior orbital fissure
- passes within the common tendinous ring from which rectus m.’s originate
CN VI - abducent
…and I suppose CN III does, too
What is the route of the postganglionic fibers of CN IX?
Via auriculotemporal nerve
Location of neuron cell bodies:
CN II
Retina
Cranial Nerves with Autonomic function
Location of preganglionic neuron cell bodies:
CN VII to salivary glands (except parotid gland)
Pons - superior salivatory nucleus
Which cranial nerve takes the following route?
- emerges from dorsal aspect of midbrain (only CN to emerge dorsally!)
- passes through cavernous sinus & superior orbital fissure
- passes outside the cocmmon tendinous ring from which rectus m.’s orginate
CN IV
Target organ of autonomic fibers from CN VII?
Lacrimal gland & mucosa of nasal cavity, nasopharynx, & palate –> lacrimation
Submandibular and sublingual salivary glands –> salivation
Location of neuron cell bodies:
Motor neurons of Trigeminal Nerve
Pons - motor nucleus of V
Location of neuron cell bodies:
CN VIII
Spiral ganglion (cochlea)
Vestibular ganglion
What is the route of the preganglionic fibers of CN IX?
- Exit brain w/ CN IX fibers
- Pass through tympanic n. and lesser petrosal n.
Which cranial nerve takes the following route?
- emerges from sides of medulla anterior to olives
- passes through hypoglossal canal and curves forward near angle of mandible superior to ansa cervicalis to enter tongue
CN XII
Location of neuron cell bodies:
Visceral and special sensory neurons of CN X
Inferior ganglion of X
What is the route of the preganglionic fibers of CN VII to the lacrimal gland?
- Through nervous intermedius & geniculate ganglion
- Via greater petrosal n. to nerve of pterygoid canal
True or false?
No part of CN XI arise from the medulla.
True. The spinal root represents CN XI in its entirety.
Which cranial nerve takes the following route?
- emerges near median plane at junction of midbrain & pons
- passes between posterior cerebral and superior cerebellar a.’s
- passthrough cavernous sinus & superior orbital fissure
- passes within the common tendinous ring from which rectus m.’s originate
CN III
Target organ of autonomic fibers from CN X?
Smooth muscle & glands of gastrointestinal tract, pulmonary & cardiovascular systems –> (varies)
Cranial Nerves with Autonomic function
Location of preganglionic neuron cell bodies:
CN IX
Medulla - inferior salivatory nucleus
What is the route of the preganglionic fibers of CN VII to salivary glands?
- Through nervous intermedius (VII) & geniculate ganglion (VII)
- Via chorda tympani (VII), it joins lingual n. (V3)
Cranial Nerves with Autonomic function
Location of postganglionic neuron cell bodies:
CN IX
Otic ganglion (attached to V3)
Location of neuron cell bodies:
Sensory neurons of CN IX
Superior ganglion of IX
