Module 1 Trigeminal, Facial, Accessory, And Hypoglossal Nerves Flashcards
Facial nerve (CN VII)
Located in posterior cranial fossa, facial canal, middle ear, face,moral cavity
Motor control of muscles of facial expression, posterior portion of digastric muscle, stylohyoid muscle, and stapedius muscle
Sensation for auricle of ear
Taste for anterior 2/3 of tongue, and palate
Parasympathetic control of lacrimal gland, submandibular and sublingual glands, mucous glands of nasal cavity, paranasal sinuses, and palate
Geniculate ganglion
Special sensory and parasympathetic axons form chorda tympani nerve
Trigeminal Nerve (CN V)
Located in middle cranial fossa
Composed of ophthalmic nerve (sensation), maxillary nerve (sensation), and mandibular nerve (motor and sensation)
Motor control of muscles if mastication, mylohyoid, digastric
Connects to pons and medulla oblongata
Has three divisions (ophthalmic, maxillary, and mandibular)
Sensation for skin of superior, medial, and inferior face, maxillary teeth and gums, palate, 2/3 of tongue
Accessory Nerve (CN XI)
Located in vertebral canal, posterior cranial fossa, and neck
Motor control for muscles of palate, pharynx, and larynx, trapezius, and sternocleidomastoid
Connects to medulla oblongata and ventral horn of C1-4
Cranial and spinal roots unite in jugular foramen, cranial part joins vagus nerve
Hypoglossal Nerve (CN XII)
Located in posterior cranial fossa, neck, and oral cavity
Motor control of genioglossus, hypoglossus, styloglossus, and intrinsic muscles of tongue
Innervates all tongue muscles except palatoglossus
Medulla oblongata
Most caudal part of brain
Extends from pons to spinal cord
Associated with cranial nerves IX, X, XI, XII
Contains respiratory, cardiac, and faso motor centers
Cerebellum
Dorsal to brainstorm
Composed of many lobes with highly folded cortex, attached to pons via cerebellar peduncles
Coordinates complex movements, monitors muscles to ensure fluid movements
Receives extensive sensory info from body and CN
White matter called arbor vitae
Influences motor function through connections with thalamus and motor cortex
Pons
Ventral aspect of brainstem between midbrain and medulla oblongata
Attached to cerebellum by middle cerebral peduncle
Associated with cranial nerves V, VI, VII, AND VIII
involved in control of sleep and respiration, transfers info to and between cerebellar hemispheres
Ophthalmic nerve
Located in middle cranial fossa, orbit, nasal cavity, and face
Sensation for superior face, tip of nose, eye, mucosa of anterior nasal cavity
Trigeminal sensory ganglia
Connects to pons and medulla oblongata
Maxillary Nerve
Located in middle cranial fossa, oral cavity, nasal cavity, orbit, and face
Sensation for skin of middle face, maxillary teeth, gums, lateral nose, mucosa of palate, posterior nasal cavity, and maxillary sinus
Trigeminal sensory ganglia
Connects to pons and medulla
Mandibular Nerve
Located in middle cranial fossa, infratemporal fossa, oral cavity, and face
Motor control of muscles of mastication, mylohyoid, anterior belly of digastric, tensor tympani, tensor veli palatini
Sensory info for skin of inferior face, mucosa lining cheek, mandibular teeth and gums, anterior 2/3 of tongue
Connects to pons and medulla
Chorda tympani nerve conducts taste info from anterior 2/3 of tongue
Facial Nerve (CN VII)
Located in posterior cranial fossa, facial canal, middle ear, face, infratemporal fossa, oral cavity
Motor control of muscles of facial expression, posterior belly of digastric muscle, stylohyoid muscle, stapedius muscle
Sensation for auricle of ear
Taste from anterior 2/3 of tongue and palate
Parasympathetic control of lacrimal gland, submandibular and sublingual salivary glands, mucous glands of nasal cavity, paranasal sinuses, and palate
Connects to pons and medulla oblongata
Geniculate sensory ganglion
Special sensory and parasympathetic axons form chorda tympani nerve
