Term
| A lesion of CN I would cause what? |
|
Definition
|
|
Term
| Anosmia could result from head trauma involving which bone? |
|
Definition
| The cribiform plate of the ethmoid bone |
|
|
Term
| Chronic exposure to toxins such as cadmium, lead, etc. could cause damage to... |
|
Definition
| the olfactory epithelial cells |
|
|
Term
| The optic tracts begin at the... |
|
Definition
|
|
Term
| The optic tracts continue to the... |
|
Definition
| lateral geniculate nuclei |
|
|
Term
| The optic chiasm is located anterior to what structure? |
|
Definition
|
|
Term
| The axons from which retinal parts will cross in the optic chiasm? |
|
Definition
|
|
Term
| Does CN III do sensory, motor or both? |
|
Definition
|
|
Term
| What are the extrinsic eye muscles innervated by CNIII? |
|
Definition
| Superior rectus, medial rectus, inferior rectus, inferior oblique |
|
|
Term
| The levator palpebrae superioris muscle is innvervated by... |
|
Definition
|
|
Term
| The autonomic component of CN III comes from which ganglion? |
|
Definition
|
|
Term
| The postganglionic parasympathics to the constrictor pupillae and ciliary muscles travel via which CN? |
|
Definition
|
|
Term
| Postganglionic sympathetic visceral efferents enter orbit from... |
|
Definition
| the internal carotid plexus |
|
|
Term
| The dilator pupillae muscle is innervated by what kind of nerves? |
|
Definition
| Postganglionic sympathetics from the internal carotid plexus |
|
|
Term
| What type of muscle is Muller's muscle, and what innervates it? What does it do? |
|
Definition
| Smooth muscle, postganglionic sympathetics from the internal carotid plexus. It helps open the eyelid. |
|
|
Term
| The occulomotor nerve has an important relationship to which blood vessels? |
|
Definition
| Superior cerebellar and posterior cerebral arteries |
|
|
Term
| The occulomotor nerve travels through which circular structure AFTER leaving the brainstem (hint-not a bony structure)? |
|
Definition
| The common tendinous ring |
|
|
Term
| The superior branch of the occulomotor nerve innervates which muscles? |
|
Definition
| Levator palpebrae and superior rectus |
|
|
Term
| Describe the innervations of the inferior branch of the occulomotor nerve. |
|
Definition
| Inferior rectus, medial rectus, to the ciliary ganglion, and then to inferior oblique |
|
|
Term
| My patient's affected eye looks "down and out." What nerve is injured. |
|
Definition
| CN III, causing 3rd nerve palsy |
|
|
Term
| The presentation of 3rd nerve palsy is caused by unopposed action of which muscles? |
|
Definition
| Lateral rectus and superior oblique |
|
|
Term
| Aside from looking "down and out," this nerve palsy also causes which symptoms? |
|
Definition
| Closed eyelid due to denervation of levator palpebrae superioris, fixed and dilated pupil due to unopposed action of sympathetics to dilator pupillae |
|
|
Term
| What does CN IV innervate? What type of innervation? |
|
Definition
| The superior oblique muscle, general motor |
|
|
Term
| Where does the trochear nerve enter the orbit? |
|
Definition
| The superior orbital fissure |
|
|
Term
| Where does the trochlear nerve pass in relation to the common tendinous ring? |
|
Definition
|
|
Term
| Where does the trochlear nerve ARISE? |
|
Definition
| From the dorsal mesencephalon, under the colliculi |
|
|
Term
| What is special about the superior oblique muscle? |
|
Definition
| It passes through a pulley |
|
|
Term
| CN IV is susceptible to injury associated with what kind of trauma? |
|
Definition
|
|
Term
| A CN IV lesion will produce which symptoms? |
|
Definition
| Diplopia, pt will tilt head down and toward the normal side |
|
|
Term
| What are the efferent innervations of the trigeminal nerve? |
|
Definition
| V3: the muscles of mastication, tensor tympani, tensor veli palatini, anterior belly of the digastric, mylohyoid |
|
|
Term
| Where does the trigeminal nerve arise? |
|
Definition
|
|
Term
| What does the opthalmic branch of the trigeminal nerve do? |
|
Definition
| Sensory from the cornea, nasal cavity and superior face/scalp |
|
|
Term
| What does the maxillary branch of the trigeminal nerve do? |
|
Definition
| Sensory from the maxillary teeth, sinuses, anterior part of the cheek |
|
|
Term
| What does the mandibular SENSORY portion of the trigeminal nerve do? |
|
Definition
| Mandibular region, side of the face, anterior 2/3 of the tongue, mandibular teeth, anterior skin of the ear, outer tympanic membrane |
|
|
Term
| What is the parasympathetic ganglion associated with V-1? |
|
Definition
|
|
Term
| What is the parasympathetic ganglion associated with V2? |
|
Definition
|
|
Term
| What is the parasympathetic ganglion associated with V3? |
|
Definition
|
|
Term
| What is another name for trigeminal neuralgia? |
|
Definition
|
|
Term
| What is the condition characterized by attacks of severe pain over the face? |
|
Definition
|
|
Term
| Where are the most common areas of trigeminal neuralgia? |
|
Definition
| the distribution of V2 and V3 |
|
|
Term
| Where are the most common trigger points of trigeminal neuralgia? |
|
Definition
| perioral, maxillary, around the nose |
|
|
Term
| What are the treatments for trigeminal neuralgia? |
|
Definition
| Anti-epileptics medications, lesioning via alcohol or radiowaves, surgical decompression via craniotomy |
|
|
Term
| What does the abducens nerve innervate? |
|
Definition
| The lateral rectus muscle |
|
|
Term
| Where does the abducens nerve exit the brainstem? |
|
Definition
| at the pontomedullary junction |
|
|
Term
| Where does CN VI enter the orbit? |
|
Definition
| The superior orbital fissure |
|
|
Term
| What structure does the abducens nerve pass through en route to it's muscular innervation? |
|
Definition
| the common tendinous ring |
|
|
Term
| A 6th nerve palsy would cause what symptom(s)? |
|
Definition
|
|
Term
| What does the motor branch of the facial nerve innervate? |
|
Definition
| Muscles of facial expression (2nd branchial arch), stapedius and posterior belly of the digastric |
|
|
Term
| Does the facial nerve have any SPECIAL sensory innervations? |
|
Definition
| Yes, taste to the anterior 2/3 of the tongue via the chorda tympani |
|
|
Term
| Visceral preganglionic efferents from the facial nerve travel via which nerves to which ganglion, and postganglionics go to which structures? |
|
Definition
| Via the greater petrosal (joined by deep petrosal) to the pterygopalatine ganglia and onto the lacrimal gland, via the chorda tympani to the submandibular ganglion and onto the submandibular and sublingual glands |
|
|
