cranial nerves Flashcards
all ___ are innervated by corticobulbar tracts
cranial nerves
efferent portions of cranial nerves have their cell bodies in ___
nuclei of the brainstem
afferent portions of cranial nerves have their cell bodies in ___
ganglia outside of the brainstem
in CN V, the function of the opthalmic nerve is to ___
provide sensory information of the forehead, eyes, nose
in CN V, the function of the maxillary nerve is to ___
provide sensory information of the upper lip mucosa, maxilla, upper teeth, cheeks, maxillary sinuses, palate
in CN V, the function of the mandibular nerve is to ___
provide sensory information of the anterior portion of the tongue, mandible, lower teeth, external ear
in CN X, the ___ provides motor innervation to the laryngeal muscles and sensation of the vocal folds
recurrent laryngeal branch
in CN X, the function of the internal superior laryngeal nerve is to ___
provide sensory information of the mucous membrane, epiglottis, base of the tongue
in CN X, the function of the external superior laryngeal nerve is to ___
provide motor innervation to the cricothyroid muscles
in CN X, the ___ provides mixed innervation to / of the muscles of the pharynx and the soft palate
pharyngeal branch
list the CNs with mixed innervation
trigeminal V, facial VII, glossopharyngeal IX, vagus X
true or false: the hypoglossal nerve has mixed innervation
false, it only has motor innervation
sensory nuclei of CN V is in the trigeminal sensory nuclei, whereas sensory nuclei of CN VII is in the ___
geniculate ganglion
motor nuclei of CN V is in the ___, whereas motor nuclei of CN VII is in the facial motor nucleus
trigeminal motor nuclei
which CNs have their brainstem location in the pons?
trigeminal V and facial VII
which CNs have their brainstem location in the medulla?
glossopharyngeal IX, vagus X, and hypoglossal XII
this CN innervates the opening and closing of the jaw (masseter, temporal is, medial pterygoid, lateral pterygoid, anterior belly of diagastric, mylohyoid, tensor veil tympani, tensor tympani)
trigeminal V
this CN innervates the muscles of expression, lacrimal glands, stylohyoid, stapedius, posterior belly of diagastric, taste for anterior portion of the tongue
facial VII
this CN innervates the stylopharyngeus muscle, sensation of posterior portion of the tongue, soft palate, tonsils, adenoids
glossopharyngeal IX
this CN innervates laryngeal and pharyngeal branches, which collectively innervate cricothyroid muscles and muscles of the pharynx and soft palate
vagus X
this CN innervates intrinsic muscles of the tongue and extrinsic muscles of the tongue
hypoglossal XII
the three extrinsic muscles of the tongue include: 1. ___ 2. ___ 3. ___ and are represented by CN XII
- genioglossus
- hyoglossus
- styloglossus
functions of CN ___ include: mastication, articulation, hyolaryngeal elevation, tensing / closing of soft palate, sensation to face, teeth, gums, anterior portion of the tongue
trigeminal V
functions of CN ___ include: movements of facial expression, hyolaryngeal elevation, saliva and tear production, taste for anterior portion of tongue
facial VII
