1. Olfactory
Optic
Oculomotor
Trochlear
Trigeminal (3 divisions…)
Abducens
Facial
Vestibulocochlear (2 divisions)
Glossopharyngeal

2. Olfactory Nerves Eric Johnson
Sensory Nerves associated with sense of smell
Contains only axons of sensory, bipolar neurons.
Located in upper nasal cavity
Olfactory receptor cells carry
impulses to neurons in olfactory
bulbs
Sensory impulses travel from
bulbs along olfactory tracts to the
cerebral centers where they are
interpreted into the sensation of
smell.

3. Optic Nerves – Jack Baesman
A pair of nerves that leads from the eyes to the brain
Enable sight
Sensory nerves
The cell bodies form ganglion in the eyes, and the axons pass through the optic foramina
The impulses are interpreted in the visual cortices of the occipital lobes
Bipolar

4. Oculomotor Nerves Primarily Motor Arise from the midbrain
Pass into the orbits of the eyes
The motor fibers transmit impulses to the muscles to:
Raise eyelids
Move eyes
Adjust the amount of light entering the eyes
Focus lenses

5. Trochlear Nerve Primarily Motor
The motor fibers transmit impulses to move the eyes.
Some sensory fibers transmit impulses associated with the condition of the muscles.
Smallest cranial nerves
Arise from the midbrain
Trochlear Nerve

6. Trigeminal Nerves Largest cranial nerves Arise from pons Mixed nerves
Sensory portions more extensive than motor portions
3 large branches
Ophthalmic
Maxillary
Mandibular

7. Abducens 6th cranial nerve
Small nerves that originate from the pons near the medulla oblongata
Are primarily motor
Enter the orbit of the eye and control motor impulses in the muscles that move the eye

8. #7: Facial Nerve By Lauren Sayers
Location: Arises from the lower part of the pons + emerges on the sides of the face.
Function:
Sensory fibers transmit impulses associated with taste receptors of the anterior tongue.
Motor fibers transmit impulses to muscles of facial expression/tear/salivary glands.

9. Vestibulocochlear nerves (VIII)
Sensory nerves from medulla oblongata
Two parts- vestibular branch and cochlear branch
Vestibular Branch- cell body associated with inner ear and reflexes that help maintain equilibrium.
Cochlear Branch- Cell body houses hearing receptors, these signals pass through medulla oblongata and pons to be sent to the temporal lobe, where they are interpreted and sent back out.

10. Glossopharyngeal nerves
9th pair
Arise from medulla oblongata
Predominately sensory fibers, carry impulses to linings of pharynx, tonsils, back of tongue
Innervate muscles of the pharynx that function in swallowing

11. Vagus Nerves
10th pair
Originate in the medulla oblongata , extend down the neck into chest abdomen
Somatic and autonomic branches
Somatic fibers carry impulses to larynx, help with speech and swallowing
Autonomic fibers supply heart and smooth muscles and glands in thorax and abdomen

12. Accessory Nerves 11th pair
Originate in medulla oblongata and spinal cord (have cranial and spinal branches)
Cranial branch- joins vagus nerve, innervates muscles of soft palate, pharynx, and larynx
Spinal branch- drops into neck, innervaes trapezius and sternocleidomastoid muscles

13. Hypoglossal nerve 12th pair Arise from medulla oblongata, into tongue
Motor fibers innervate muscles that move the tongue for speaking, chewing, and swallowing.
Hypoglossal nerve