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42 Cards in this Set

  • Front
  • Back
Where does the Trochlear nerve originate?
Dorsal surface of the brain stem.
What is the route of the Trochlear nerve after leaving its origin including the exit from the cranium?
Curves around the lateral aspect of the cerebral peduncle, and exits the cranium through the orbital fissure.
What does the trochlear nerve do?
It's a motor nerve that supplies the superior oblique muscle of the eye.
What number is given to the Trochlear nerve?
What are the three branches of the trigeminal nerve?
Opthalmic nerve

Maxillary Nerve

Mandibular Divisions
What is the number given to the Trigeminal nerve?
Where does the Trigeminal nerve take its sensory roots? Where is its motor root compared to the sensory root?
Lateral surface of pons.

Motor root is more ventrally located.
Where does the Opthalmic divsion of the Trigeminal nerve leave the skull?
Oribital fissure.
Is the opthalmic division of the Trigeminal nerve motor or sensory?

What area does it innervate?

Skin and mucosa overlying the eyeball, forehead and nose.
Where does the Maxillary division of the Trigeminal nerve leave the skull?
Round foramen.
What is innervated by the Maxillary division of the Trigeminal nerve?
Sensory supply to palate, upper teeth, upper lip, and part of the forehead and cheek.
Where does the Mandibular division of the Trigeminal nerve leave the skull?
Foramen ovale.
What is innervated by the Mandibular division of the Trigeminal nerve?
Motor components supply mainly the muscles of mastication.

Sensory components supply the skin and mucosa of the tempral region, ear, jaw, cheek, lower teeth, and tongue.
What is the number given to the Abducens cranial nerve?
Where does the Abducens nerve arise?
Near the lateral margin of the midbrain, posterior to the pons.
Where does the Abducens nerve leave the skull?
Orbital fissure
What does the Abducens nerve innervate?
External rectus and retractor oculi muscles of the eye.
What is the number for the Facial and Vestibulocochlear nerves?
Facial - VII
Vestibulocochlear - VIII
Where does the facial nerve enter and exit the skull?
Enters through internal auditory meatus of the skull.

Exits through the facial canal of the petrous bone and emerges at the stylomastoid foramen.
Where does the Vestibulocochlear nerve enter the skull?
Through the internal auditory meatus.
What do the major motor components of the Facial nerves innervate?

The sensory components?
Muscles of the head (excluding the muscles of mastication).

Supply the tongue and soft palate.
Between what two structures of the medulla does the Facial nerve pass?
Trapezoid body and the pons.
What is the function of the Vestibulochochlear nerve?
It is the auditory nerve and transmits sensation of equilibrium from the inner ear.
The vestibulocholear arises in the _______ where the trapezoid body passes beneath the cerebellum.
After entering the internal auditory meastus, the vestibulocochlear nerve divides into the ____ and the ____ divisions.
Vestibular and cohclear divisions.
What is the function of the vestibular nerve including the three areas involved?
It conveys sensations of equilibrium from the semicircular canals, the sacculus, and the utriculus.
What is the function of the cochlear nerve?
It conveys auditory sensations from the cochlea.
What are the cranial nerve numbers assigned to the Glossopharyngeal, Vagus, Accessory, and Hypoglossal nerves?
Where do the Glossopharyngeal, Vagus and Accessory nerves exit the skull?
Via the jugular foramen.
Where does the Hypoglossal nerve exit the skull?
Via the hypoglossal foramen.
Where does the Glossopharyngeal nerve originate?
In the medulla, on the lateral side posterior to CnVIII.
What does the Glossopharyngeal innervate?
A sensory branch goes to the tongue and pharyngeal mucosa.

A motor branch supplies the pharyngeal muscles.
Where does the Vagus nerve originate?
Lateral side of the medulla posterior to CnIX.
What does the Vagus nerve innervate?
The sensory branches supply the external ear and laryngeal muscosa.

The motor branches supply the muscles of the pharynx and larynx.

Both motor and sensory branches supply the heart, lungs, and abdonminal viscera.
The Accessory nerve is formed by numerous rootlets from the ___ and ___.
medulla and spinal cord.
What does the Accessory nerve innervate?
Motor supply to various neck and trapezius muscles.
Where does the Hypoglossal nerve arise?
From the ventral side of the medulla, all along its length.
What primary structure does the Hypoglossal innervate?
The tongue.
For each colored area, fill in the appropriate cranial nerve number for areas on the left side. Don't worry about the abbreviations on the right side.
See the picture.
Label all colored areas except green.
See the labeled picture.