Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
CN V Trigeminal
|
3 branches responsible for sensory and motor innervations:
sensory: motor: innervate muscles of mastication & biting & tensor tympani muscle to adjust tension of typmanic membrane to increase sensitivity to soft sounds |
|
|
CN VII Facial
|
sensory and motor components.
sensory: taste in front 2/3 portion of tongue, sensation of the external ear motor: innervates autonomic parasympathetic functions of salivation & lacrimation, and inntervates facial expression muscles, stupedius muscle of middle ear to dampen loud sounds Damage: If corticobulbar nerve controlling the facial nerve is cut the lower 2/3 of contralateral face will be paralyzed (UMN lesion). If facial nerve is cut the whole ipsilateral half of the face is paralyzed (LMN lesioni.e., Bell's Palsy). |
|
|
CN VIII Vestibulocochlear
|
sensory only responsible for hearing & balance through distict pathways
auditory pathway: cochlear nucleas:cochlear nerve: internal acoustic meatus:cochlear (spiral) ganglion: cochlea hair cells vestibular pathway: vestibular nucleus: vestibular nerve: internal acoustic meatus: vestibular ganglion: utricle, saccule, ampulla hair cells |
|
|
CN CN IX Glossopharyngeal
|
sensory & motor components.
sensory: taste & sensation for the back 1/3 of tongue and back of tongue & oral cavity (pharynx, soft palate) motor: controls muscles associated with swallowing, speech & salivation. Innervates stylopharyngeus & helps elevation of pharynx for speech & swallowing Damage: UMN lesion nothing clinically evident due to bilateral input from coricobulbar nerve that deccusate vs. LMN lesion will result in difficulty with swallowing/speech |
|
|
CN X Vegus
|
sensory & motor components. works in combination with glossopharyngeal nerve
sensory: taste, sensation of external ear, canal & TM, pharynx, larynx, trachea, esophagus, & vicera motor: innervate larynx, pharynx (palatal arches & uvula) & viscera, & aids in phonation, swallowing & elevates palate Damage: UMN lesion the contralateral (opposite side) is affected) vs. LMN lesion ipsilateral side affected & probs. w/ swallowing, speech & breathing will be evident. Therefore the uvula will defiate to INTACT side due to the weak muscles not being able to pull on their side to center the uvula |
|
|
CN XII Hypoglossal
|
motor only responsible for tongue movement
Damage: lesion tongue deviates to Damaged side |
