Cranial Nerve V Flashcards
Name the nerve contributing to the indicated sensory patterns. What divisions should we pay close attension to?
Eye, mouth, ear, nose, and chin
Name the parts of the cavernous sinus. Which beanches of the trigeminal nerve pass throuhg the cavernous sinus?
V1 and V2 pass through the cavernous sinus
Name the branches of the opthalmic nerve
What nerve provides the parasympathetic innercation that follows the short cilliary nerve? In which ganglion does it synapse?
V3
the Ciliary ganclion
Name the indicated branches of hte opthalmic nerve
Identify the branches of the nasocilliary nerve?
Identify the nerves providing sensory innervation surrounding the eye
What cranial foramen does the maxillary (V2) pass through?
Foramen rotundum
Identify the branches of the maxillary nerve
What distribution of the nasal cavity is sensation provided by V1? V2?
V1: anterior and superior
V2: inferior and posterior
Describe what is innervated by the greater and lesser palatine nerves
Greater: Hard palate
Lesser: posterior soft palate and uvula
Where does sensation come from for the anterior 2/3 of the tongue? Taste?
Sensation: Lingual nerve
Taste: Chorda Typmapii
In addition to the muscles of mastication, what two muscles are innercated by the mandibular nerve?
tensor veli palatine and tensor tympani
Identify the branches of the mandibular nerve
How are sympathetic and parasympathetic innervations provided to the nasal cavity, maxillary sinus, and palate?
Identify the indicated structures
The greater protrosal nerve is composed of preganglionic parasympathetic fibers that leave the facial nerve at the geniculate ganglion and pass anteriorly across the floor of th emiddle cranial fossa. Parasympathetic fibers join postganglionic sympathetic fibers; both autonomic fibers pass through the pterygoid canal and enter the pterygopalatine ganglion
Postganalionic parasympatheric fibers leave the ganglion and pass with all branches of the maxillary nerve to supply mucous glands of the nose and palate
How do autonomic fibers reach the lacrimal gland?
Postganglionic parasympathetic fibers from the pterygopalatine ganglion pass in the zygomatic nerve and through a communicating branch to the lacrimal nerve to reach the lacrimal gland
How do autonomic fibers reach the submandibular and sublingual glands? What other sensation is provided through fibers that run this route?
- Chorda tympani branches from CN VII in middle ear and enters the infratemporal fossa where it joins the lingual nerver.
- Special sensory (taste) fibers accompany the lingual nerve to synapse on taste receptors in the anterior 2/3 of the tongue
- Preganglionic parasympathetic fibers in chroda tymapni accompany lingual nerve to synapse on postganglionic neurons in the submandibular ganglion. Postganglionic fibers from that ganglion stimulate secretion in submandibular and sublingual salivary glands
How do autonomic fibers reach the parotid gland?
- preganglionic parasympathetic fibers in the glossopharyngeal nerve control salivation in the partotid gland. These fibers take a circuitous route to reach their destination.
- As CNIX exits the skull, preganglionic parasympthetic fibers follow the tympanic nerve. They pass superiorly into the middle ear, forming the tympanic plexus on the medial wall of that cavity. They continue through a small opening into the middle cranial fossa and form the lesser petrosal nerve. The lesser petrosal nerve passes anteriorly across the middle cranial fossa and exits the skull through foramen ovale and synapses on the otic ganglion
- Postganglionic fibers leave the otic ganglion and join the auriculotemporal nerve to distribute to the parotid gland.
