CN7 Flashcards
What classifications of fibers are conveyed at the apparent origin of the seventh cranial nerve?
Branchial efferent, visceral efferent, somatic efferent, and special visceral afferent.
Because of its function, the seventh cranial nerve is often called?
Great motor nerve the face.
What is the opening through which the seventh cranial nerve exits the cranial vault?
Internal acoustic meatus of the temporal bone.
Most of the seventh cranial nerve will exit the skull via what?
The stylomastoid foramen
Into what region of the head will the stylomastoid foramen open?
The parotid region.
Branchial efferent fibers carried in the seventh cranial nerve will innervate what muscles?
Muscles of facial expression, muscles of the scalp and auricle, the buccinator, platysma, stapedius, stylohyoid, and posterior belly of the digastric.
Visceral efferent fibers conveyed in the seventh cranial nerve originate from which nucleus?
Superior salivatory nucleus.
Preganglionic visceral efferent fibers of cranial nerve 7 will exit the pons in what nerve?
Nervus intermedius, nerve of wrisberg, sensory root of facial nerve.
Which immediate branch of the seventh cranial nerve will convey preganglionic parasympathetic efferent fibers to the lacrimal gland?
Greater petrosal or greater superficial petrosal nerve.
Which branch of the seventh cranial nerve will convey preganglionic parasympathetic fibers into the pterygopalatine ganglion?
Vidian nerve or nerve of the pterygoid canal.
What are the names of the ganglion of synapse in the efferent pathway of the lacrimal gland?
Pterygopalatine ganglion, sphenopalatine ganglion, and meckels ganglion.
Postganglionic parasympathetic efferent fibers from the pterygopalatine, sphenopalatine, or meckels ganglion will become incorporated in which cranial nerve branch?
Maxillary nerve of the trigeminal.
Which branch of the zygomatic nerve will convey post ganglionic parasympathetic efferent fibers to the lacrimal gland?
Zygomaticotemporal nerve.
Which ophthalmic branch will contain post ganglionic parasympathetic efferent fibers?
Lacrimal nerve.
Preganglionic parasympathetic efferent fibers from the seventh cranial nerve to the submandibular and sublingual glands will exit the pons in what nerve?
Nervus intermedius, nerve of Wrisberg, and sensory root of facial nerve.
Which immediate branch of the seventh cranial nerve will convey preganglionic parasympathetic efferent fibers to the submandibular gland and sublingual gland?
Chorda tympani nerve.
The chordae tympani nerve exits the temporal bone vie which opening?
The petrotympanic fissure of the temporal bone.
The chorda tympani nerve will join which nerve?
The lingual nerve of the mandibular division of the trigeminal.
Peripheral sensory processes from receptors around the ear and mastoid region are conveyed in the seventh cranial nerve from what other cranial nerve?
Vagus.
I general, somatic afferent pathways typically terminate in which nucleus?
Spinal trigeminal nucleus.
Peripheral sensory processes from taste receptors located on the anterior two thirds of the tongue are conveyed in which branch of the fifth cranial nerve?
Lingual nerve of mandibular division.
Peripheral sensory processes from taste receptors located on the anterior two thirds of the tongue are conveyed in which branch of the seventh cranial nerve?
Chorda tympani.
Peripheral sensory processes from taste receptors located on the anterior two thirds of the tongue conveyed in the seventh cranial nerve to what ganglion?
Genicular ganglion or geniculate ganglion.
Central processes from pseudounipolar neurons associated with taste in the geniculate ganglion enter the pons in what nerve?
Nervus intermedius, nerve of Wrisberg, and the sensory root of the facial nerve.
