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Anatomy and Physiology of Cranial Nerves

Cranial Nerves section of Anatomy and Physiology of Speech and Hearing Mechanisms
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5th Cranial Nerve
Trigeminal
7th Cranial Nerve
Facial
8th Cranial Nerve
Vestibulocochlear
9th Cranial Nerve
Glossopharyngeal
10th Cranial Nerve
Vagus
11th Cranial Nerve
Accessory
12th Cranial Nerve
Hypoglossal
What does the motor branch of the Trigeminal Nerve do?
innervates the muclses of mastication (chewing muscles)
What are the three sensory branches of the Trigeminal Nerve?
Ophthalmic, maxiallary and mandibular
What nerve supplies sensation to the anterior 2/3 of the tongue?
Lingual nerve of the mandibluar nerve branch
What nerve supplies motor information to the tensory tympani and tensor veli palatini muscles?
Trigeminal Nerve
What are some symptoms of Trigeminal nerve damage?
facial pain or difficulty for opening and closing jaw
How do you test for trigeminal nerve damage?
touching the three areas of the face and looking for symmetry of opening and closing jaw
What does the motor branch of the Facial Nerve do?
innervates facial muscles and stapedius muscle
What does the sensory branch of the facial nerve do?
provides taste for the anterior 2/3 of tongue via the Chorda Tympani
What specifically provides taste to the anterior 2/3 of the tongue?
Chorda Tympani
What are some symptoms of facial nerve damage?
Unilateral facial paralysis
How do you test for Facial Nerve Damage?
sustained /i/ /u/ sounds
What does the Vestibulocochlear Nerve do?
sensory info to ear and helps balance
What are symptoms of Vestibulocochlear damage?
deafness or hearing loss, vertigo
What portion of the Vestibulocochlear Nerve enters the brainstem at the lower pons lateral to the facial nerve?
Cochlear Portion
What portion of the Vestibulocochlear Nerve enters the vestibular nuclei in the lower pons/upper medulla?
Vestiblar Portion
How do you test for Vestibulocochlear damage?
audiological and balance testing
What does the motor branch of the Glossopharyngeal nerve do?
motor info to the muscles of the pharynx
What does the sensory branch of the Glossopharyngeal nerve do?
taste to the posterior 1/3 of the tongue and sensation to posterior portion of the oral cavity
What is the name of the motor nuclei that supplies motor information to the Glossopharyngeal nerve?
Nucleus Ambiguus
What are some symptoms of Glossopharyngeal damage?
dysphagia, loss of gag reflex
What are the three major branches of the Vagus Nerve involved in Speech?
Pharyngeal nerve, Superior Laryngeal Nerve, Recurrent nerve
What cranial nerve supplies motor information to the pharyngeal and laryngeal muscles?
Vagus Nerve
What cranial nerve supplies sensory information to the pharynx and larynx?
Vagus Nerve
What is the motor nuclei for the Vagus Nerve?
Nucleus Ambiguus
What does the Pharyngeal nerve branch of the Vagus nerve do?
motor and sensory information to the muscles of the pharynx and soft palate
What nerve provides motor and senory information to the larynx (vocal folds)?
Superior Laryngeal Nerve
The Superior Laryngeal Nerve provides motor information to what two specific structures?
Cricothyroid and Inferior Constrictor muscles
What muscle is responsible for pitch changes?
Cricothyroid muscle
What does the External Portion of the Superior Laryngeal Nerve do?
motor information for the Cricothyroid
What does the Internal Portion of the Superior Laryngeal Nerve do?
sensory information to the pharynx (throat)
What branch of the Vagus Nerve provides motor information to the muscles of the pharynx (except the cricothyroid)?
Recurrent Nerve
The recurrent nerve is sensory to the
Esophagus and trachea
The left Recurrent branch loops around
the Aorta
The right Recurrent branch loops around
the right subclavian artery
Aphonia, dysphonia, dysphagia and hypernasal speech are symptoms of:
Vagus Nerve damage
Checking for soft palate elevation or having the client produce a sustained phonation for voice quality is a way to test the:
Vagus Nerve
What is the motor nuclei for the Accessory Nerve?
Nucleus Ambiguus
The Accessory Nerve provides motor information to the:
soft palate and larynx
This portion of the Accessory Nerve supplements motor innevation of the Vagus nerve:
Cranial
Which portion of the Accessory nerve creates head movement?
Spinal portion
There is damage to the __________ if the patient cannot shrug their shoulders.
Accessory Nerve
If you have the client say "ahhhh" or move their head up and down, you are checking for damage to what Cranial Nerve?
Accessory Nerve
What Cranial Nerve provides motor information to the intrinsic and extrinsic muscles of the tongue?
Hypoglossal Nerve
What is a symptom of Hypoglossal Nerve damage?
deviation of tongue to side of lesion
If you ask the client to stick their tongue out and move it side to side, which Cranial Nerve are you checking for damage?
Hypoglossal Nerve
Sensory or Motor: Trigeminal Nerve
Mixed
Sensory or Motor: Facial Nerve
Mixed, mainly motor
Sensory or Motor: Vestibulocochlear
Sensory
Sensory or Motor: Glossopharyngeal Nearve
Mixed
Sensory or Motor: Vagus
Mixed Nerve
Sensory or Motor: Accessory Nerve
Motor only
Sensory or Motor: Hypoglossal Nerve
Motor only