Before We Start
Why learn a second phrase for the same information
This mnemonic covers the exact same 12 cranial nerves, in the exact same order, as the "Oh Oh Oh" phrase in the previous lesson. It's included as a dedicated page because different students latch onto different phrasing — this is the older, more traditional version found in most anatomy textbooks, and some students find its vivid, slightly absurd imagery ("towering top," "a fin," "German") easier to visualize and recall than a simpler phrase.
💡 Pick One, Not Both
Trying to memorize both mnemonics at once often causes students to mix words from each phrase together under exam pressure. Read through both, pick whichever one feels more natural on the first try, and commit to that one only.
Mnemonic
Word-by-word breakdown
On — Old — Olympus
CN I, II, III — Olfactory, Optic, Oculomotor
"Olympus" is a direct callback — Mount Olympus, home of the Greek gods — making the first three nerves easy to visualize as a mythic starting point.
Towering
CN IV — Trochlear
The tallest point of Olympus, "towering," carries the T sound into Trochlear — the nerve controlling downward-and-inward eye movement.
Top
CN V — Trigeminal
The peak itself. Trigeminal handles facial sensation and chewing.
A Fin
CN VI — Abducens
An odd image — a fin — but the A sound carries directly into Abducens, the nerve that abducts (turns outward) the eye.
And German
CN VII — Facial
"German" carries a hard G sound loosely tying to Facial in this older mnemonic tradition — less phonetically direct than other words in the phrase, which is exactly why some students prefer the more literal "Feel" from the alternate version.
Viewed
CN VIII — Vestibulocochlear
"Viewed" carries the V sound into Vestibulocochlear — hearing and balance.
Some
CN IX — Glossopharyngeal
A weaker phonetic link, but it holds the ninth position — taste to the posterior tongue and the sensory half of the gag reflex.
Hops
CN X, XI, XII — Vagus, Accessory, Hypoglossal
In the traditional full version, the phrase continues past "Hops" with additional words for X, XI, and XII (commonly extended as "...Vagus Says Hi" or similar regional variants) — the exact ending varies more by program than the first nine words do.
💊 If your program teaches a specific ending for X, XI, XII in this version, use that one consistently — the ending of this particular mnemonic is the least standardized part.
🏥 Clinical Scenario — Choosing Between Two Mnemonics Under Pressure
During a timed skills exam, a student blanks momentarily when asked to name CN IV.
Recall Attempt
The student tries "Oh Oh Oh To..." — but also half-remembers "Towering" from the Olympus version, causing a brief freeze. This illustrates exactly why mixing two mnemonics is risky — the safest approach is full commitment to one system, reviewed until it's automatic.
Resolution
The student settles on "To" (from the first version, which they'd drilled more) and correctly answers Trochlear. Having a clear primary mnemonic — with the alternate only as backup context, not active competition — is the safer long-term study strategy.
📌 NCLEX Application
NCLEX does not test which mnemonic you use — only whether you know the nerve name, number, and function. Questions are written in clinical language ("the nurse assesses CN IV by asking the patient to look down and toward the nose") rather than mnemonic language, so either phrase is equally valid as a study tool — the goal is fluency with the underlying nerve facts, not the phrase itself.
⚠️ The Trap — Blending Two Mnemonics Mid-Recall
Learning both this phrase and the "Oh Oh Oh" version in the same study session, without clearly designating one as primary, is the single most common cause of mnemonic-related mix-ups on exams — a student starts one phrase, gets stuck, and jumps to the other mid-sentence, losing their place entirely.
The safeguard: Choose one mnemonic as your primary system before your first exam. Only look at the second one as background context, not as an active study tool you're trying to memorize in parallel.
✓ Quick Self-Test
Answer before checking:
1. Which word in this mnemonic represents CN III (Oculomotor)?
2. What image does "Olympus" evoke, and why does that help memory?
3. Which nerve does "Viewed" represent, and what is its function?
4. Why is mixing this mnemonic with another one risky on exams?
Answers:
1. "Olympus" — the third "O" word, mapping to CN III (Oculomotor).
2. Mount Olympus, home of the Greek gods — a vivid, memorable image that anchors the first three nerves as a mythic starting point.
3. "Viewed" = CN VIII (Vestibulocochlear) — hearing and balance.
4. Blending two phrases mid-recall causes students to lose their place; committing to one system avoids this.