Cranial nerves Flashcards
Sensations of Pain and temperature are projected to the ________________ (ipsilateral/contralateral/both) cerebral cortex.
contralateral
The PSNS fibers follow which 4 cranial nerves?
3,7,9,10
The _________ ____________ ___________ coordinates eyeball movement by yoking together CN 3,4 and 6.
Medial longitudinal fasciculus
Which type of receptors regulate respiratory activity and are sensitive to changes in pH and pCO2?
CHEMORECEPTORS
Motor innervation of the Dilator Pupillae muscle comes from the _______ nervous system.
Sympathetic (fight or flight)
Which type of receptors regulate blood pressure ?
BARORECEPTORS
What 2 types of aortic receptors relay sensory info to the vagus nerve?
Chemoreceptors and baroreceptors
This muscle of the soft palate opens the eustachian tubes/ “pops” the ears
Tensor Veli Palatani
What are the 3 symptoms you will see with Horner’s Syndrome?
Ptosis, Miosis, and anhydrosis
______occurs if there is damage to CN I.
Anosmia
If a person has a NEGATIVE “Doll’s Eye test” (or Vestibulo-Ocular Reflex) that usually indicates they have an injury to their __________.
Brain stem.
Normal is a positive Dolls Eye Test, where our eyes stay fixed on an object when we move our heads. If the eyes do not do this then this means the brain stem has an issue because that is where this is controlled.
__________is the term for bilateral paralysis of the vocal cords and requires immediate medical attention
Stridor
The midbrain, pons and medulla make up the _______
brainstem
The trochlear nerve does what 3 things to the eye’s movement? If this nerve is damaged, what do they call the appearance the pt then has?
Depresses, intorts, and abducts
The pathetic look
This nerve gets sensory innervation from concha, external auditory meatus, and skin behind ear, as well as TASTE from anterior 2/3 of tongue.
CN VII (Facial)
This cranial nerve is really long, making it susceptible to trauma, but it is rarely affected in isolation.
Trochlear nerve
What are two motor symptoms that would occur if you had a lesion to the Vagus nerve?
Dysphagia, Hoarseness
Vagus nerve is the MAJOR nerve for swallowing and phonation/vocal cords
The facial nerve (CN VII) has sensory and motor innervation. True or false?
TRUE
Which cranial nerve supplies motor innervation to the intrinsic muscles of the tongue ?
CN XII (Hypoglossal)
What action of the eyeball is CN VI responsible for? What happens if this nerve is damaged?
The Abducens nerve innervates the lateral rectus muscle, which Abducts the eye.
Damage to CN VI would cause:
Strabismus, horizontal diplopia
_______ is constriction of the pupil, while _________ is dilation of the pupil.
Miosis, mydriasis
This type of reflex is pronounced in pt’s with upper motor neuron lesions. The afferent and efferent limb of this reflex is in CN V.
Jaw Jerk Reflex
Where are dental nerve blocks for the lower mouth/mandible given?
at the entrance of the Inferior Alveolar Nerve in the Mandibular Foramen.
Which cranial nerve is associated with taste (salt, bitter, sour, sweet, savory) to Anterior 2/3 of Tongue?
CN VII (Facial)
This muscle of the soft palate elevates the uvula.
Musculus Uvulae