Cranial Nerves Mnemonics [Clean, Dirty & Easy-to-Remember]

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Cranial Nerves Mnemonics


The Head and Neck Anatomy is one of the most important topics when it comes to studying the 2nd year human anatomy at medical school. It deals with structures primarily involving the head and neck region of the body. It is highly recommended that you master this region if you really wish to perform well both in the exams and as a future clinician. This article is dedicated to sharing cranial nerves mnemonics so that you can easily remember things like: the names of the 12 cranial nerves (in exact sequence/order) and also types of cranial nerves (their modality: sensory, motor or both) and their functions as well. ūüôā



But before that we jump to the cranial nerves mnemonics, let’s take a look at a few important things regarding the Cranial Nerves:

What are Cranial Nerves?

For starters, there are 12 pairs of cranial nerves that arise directly from the brain and brainstem (while on the other hand, the spinal nerves emerge from the spinal cord and its segments). To further your insight, 10 of the 12 cranial nerves originate from the brainstem and only two, the Olfactory Nerve (CN I) and the Optic Nerve (CN II) originate from the Cerebrum of the brain. Each cranial nerve has its own specific function which can be well understood by looking into its modality and the area that it is supplying. For the sake of simplicity, the cranial nerves transmit information from different part of the body, mainly from the regions of the Head and Neck, to the brain.

Here’s a cranial nerves summary table with fast facts such as:

  1. Number (denoted by CN, for Cranial Nerve and Roman numeric I to XII)
  2. Cranial Nerve Names
  3. Modality (Sensory, Motor or Both/Mixed)
  4. Origin
  5. Exit Route
  6. Function of the Cranial Nerves

Cranial Nerves Summary Table

Number of the Cranial Nerve Name of the Cranial Nerve Modality Origin Exit Route Function of the Cranial Nerve
1: CN-I Olfactory Nerve Sensory Olfactory Lobe Cribriform Plate  Smell
2: CN-II Optic Nerve Sensory Optic Lobe Optic Canal  Vision
3: CN-III Occulmotor Nerve Motor Floor of the Midbrain Superior Orbital Fissure Helps in moving the eyelid & eyeball and adjusts the pupil and lens of the eye
4: CN-IV Trochlear Nerve Motor From the junction between the optic lobe and cerebellum Superior Orbital Fissure Moves the eyeballs
5: CN-V Trigeminal Nerve (Branches: Ophthalmic, Maxillary, and Mandibular) Both Side of the Medulla Oblongata  i.Ophthalmic: Superior orbital fissure
ii.Maxillary: Foramen Rotundum
iii.Mandibular: Foramen Ovale
Controls facial muscles and actions including chewing and facial sensations
6: CN-VI Abducens Nerve Motor Ventral side of the Medulla Superior Orbital Fissure Moves the eyeballs
7: CN-VII Facial Nerve Both Lateral side of the  Medulla Internal Acoustic Meatus Responsible for taste, tears (lacrimation), salivation and facial expressions
8: CN-VIII Vestibulocochlear Nerve Sensory Floor of the Medulla Internal Acoustic Meatus Hearing and balance
9: CN-IX Glassopharyngeal Nerve Both Side of the Medulla  Jugular Foramen Controls swallowing, saliva, taste
10: CN-X Vagus Nerve Both Sides of the Medulla, from the Vagus Ganglion  Jugular Foramen Brings about control over the Parasympathetic Nervous System e.g. smooth muscles of the GI tract
11: CN-XI Accessory Nerve Motor Sides of the Medulla and Spinal Cord  Jugular Foramen Head and shoulder movement and assists in swallowing
12: CN-XII Hypoglossal Nerve Motor Ventral Side of the Medulla Hypoglossal Canal Controls tongue muscles and swallowing

 

Origin of the Cranial Nerves

Below is an illustration depicting the origin of Cranial Nerves from different areas of the brain:

Origin of the Cranial Nerves from different areas of Brain
PHOTO CREDIT: Patrick J. Lynch (Wikimedia Creative Commons)

 

Cranial Nerves Mnemonics

Alright, we hope that with the above-mentioned discussion, you must now have developed a sound understanding of the cranial nerves (for more, please refer to standard textbooks). In this part of our blog post, we’ll be discussing the cranial nerves mnemonics so that you can easily remember the order of cranial nerves (from cranial nerve I to XII)¬†and¬†modality/function of cranial nerves.




Cranial Nerves Mnemonics for Remembering Order of CN

Below are the cranial nerves mnemonics to help you remember the order of cranial nerves from CN I (olfactory nerve) to CN XII (hypoglossal nerve):

CLEAN MNEMONICS

On old Olympus’ towering top a Finn and German viewed some hops

Ooh, ooh, ooh to touch and feel very good velvet. Such heaven!

Oh, Oh, Oh to take a Family vacation! Go vegas and Hardees.

DIRTY MNEMONIC

Oh, oh, oh, to touch and feel a girl’s vagina. Ah, heaven. ūüėÄ

MNEMONIC KEY:

Focus on the first alphabet as “key” to the above-mentioned mnemonics:

O: Olfactory nerve (CN I)
O: Optic nerve (CN II)
O: Oculomotor nerve (CN III)
T: Trochlear nerve (CN IV)
T: Trigeminal nerve (CN V)
A: Abducens nerve (CN VI)
F: Facial nerve (CN VII)
A: Auditory (or vestibulocochlear) nerve (CN VIII)
G: Glossopharyngeal nerve (CN IX)
V: Vagus nerve (CN X)
S: Spinal accessory nerve (CN XI)
H: Hypoglossal nerve (CN XII)

 

Cranial Nerves Harry Potter Mnemonic

Here’s a special Harry Potter themed mnemonic to help you memorize order of cranial nerves in a fun way: ūüôā




Cranial Nervous Harry Potter Mnemonic

 

 

*RECOMMENDED MNEMONICS*

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Seizure Differential Diagnosis Mnemonics

 

 

Cranial Nerves Sensory Or Motor Mnemonic

Below are cranial nerves mnemonics to help you easily remember which cranial nerves are sensory, motor, or mixed/both (modality/functions of CN I to CN XII).

CLEAN MNEMONIC

Some say marry money but my brother says big brains matter more.

DIRTY MNEMONIC

Some say money matters¬†but my brother says big boobs¬†matter more. ūüėÄ

MNEMONIC KEY:

S: Sensory (Olfactory nerve РCN I)
S: Sensory (Optic nerve РCN II)
M: Motor (Trochlear nerve РCN IV)
B: Both (Trigeminal nerve РCN V)
M: Motor (Abducens nerve РCN VI)
B: Both (Facial nerve РCN VII)
S: Sensory (Vestibulocochlear nerve РCN VIII)
B: Both (Glossopharyngeal nerve CN IX)
B: Both (Vagus nerve РCN X)
M: Motor (Accessory nerve РCN XI)
M: Motor (Hypoglossal nerve РCN XII)

And here’s a picture (well, a little creepy, I know! ūüėÄ ) showing functions of the cranial nerves:

And this old one too:

 

That’s it folks! We hope that you find these mnemonics useful in memorizing key facts about the cranial nerves. ūüôā

Happy learning people! ūüôā

Got more interesting or dirtier cranial nerves mnemonics? ūüėÄ Hits us by commenting below. ūüôā

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