Cranial Nerves Flashcards
What is Nerve I?
Olfactory
Nerve II
Optic
Nerve III
Oculomotor
Nerve IV
Trochlear
Nerve V
Trigeminal
Nerve VI
Abducens
Nerve VII
Facial
Nerve VIII
Vestibulocochlear
Nerve IX
Glossopharyngeal
Nerve X
Vagus
Nerve XI
Accessory
Nerve XII
Hypoglossal
Carries impulses for sense of smell
Olfactory
Carries impulses for vision
Optic
Where does the oculomotor nerve supply motor fibers?
Superior rectus, inferior rectus, medial rectus, inferior oblique (move the eyeball)
Muscles controlling pupil size and lens shape
Supplies motor fibers for superior oblique eye muscle.
Trochlear
Conducts sensory impulse from skin of face & mucosa of nose & mouth
Contains motor muscles for chewing muscles.
Trigeminal
Supplies motor fibers of lateral rectus muscle.
Abducens
Activates the muscles of facial expressions, and lacrimal and salivary glands.
Facial
Carries sensory impulses from taste buds of anterior tongue.
Facial
The ___ branch of the vestibulocochlear nerve transmits impulses for sense of balance, while the ___ cochlear branch transmits impulses for sense of hearing.
Vestibular; cochlear
Supplies motor fibers to the pharynx that promote swallowing and saliva production.
Glossopharyngeal
Carries sensory impulses from taste buds of posterior tongue.
Glossopharyngeal
The glossopharyngeal nerve forms pressure receptors of the ___ artery.
Carotid
Fibers carry sensory impulses from and motor impulses to the pharynx, larynx, and abdominal and thoracic viscera.
Vagus
Most motor fibers in the vagus nerve are ___ fibers that promote digestive activity and help regulate heart activity.
Parasympathetic
The accessory nerve is composed of mostly motor fibers that activate which muscles?
Sternocleidomastoid and trapezius muscles
Motor fibers control tongue movements.
Hypoglossal
Fibers emerge from the medulla and descend into the thoracic and abdominal cavities.
Vagus
Fibers arise from the superior spinal cord and travel to the muscles of the neck and back.
Accessory
From what region of the spinal cord does the accessory nerve arise?
C1-C5
Fibers emerge from the medulla and run to the throat.
Glossopharyngeal
Fibers run from the medulla to the tongue.
Hypoglossal
Fibers run from the medulla to the eye.
Oculomotor and trochlear
Fibers emerge from the pons and form three divisions that runs to the face.
Trigeminal
Fibers leave the pons and run to the face.
Facial
Fibers leave the pons and run to the eye.
Abducens
Fibers run from the equilibrium and hearing receptors of the inner ear to the brain stem.
Vestibulocochlear
Fibers arise from the olfactory receptors in the nasal mucosa and synapse with the olfactory bulbs.
Olfactory
Send fibers to the olfactory cortex.
Olfactory bulbs
Fibers arise from the retina or the eye and form what nerve?
Optic
The two optic nerves form the ___ by partial crossover of fibers.
Optic chiasma
The fibers of the optic nerve continue to the optic cortex as ___.
Optic tracts
