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Human Anatomy

Anatomy Mnemonics For The Cranial Nerves
~0.6 mins read
The 12 CRANIAL NERVES:
I - Optic nerve 
II - Olfactory nerve 
III - Oculomotor nerve
IV - Trochlear nerve
V - Trigeminal nerve
VI - Abducens nerve
VII - Facial nerve
VIII - Acoustic (vestibulocochlear) nerve 
IX - Glossophrayngeal nerve
X - Vagus nerve
XI - Spinal accessory nerve 
XII - Hypoglossal nerve

Remember the 12 nerves in the following order
On Old Olympus Towering Tops, A Finn And German Viewed Some Hops

If you confuse which comes first (Optic or Olfactory) remember:
• You have I nose. You have II eyes. (I - Olfactory; II -- Optic)

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Picture source: USMLE first aid. Please buy a copy to get more info on this Mnemonic

Anatomy Mnemonics For Innervation Of Extraocularmotor Muscles (Ophthalmology))
~1.0 mins read
The nerves that supply the extraocularmotor muscles are
1. Abducens nerve or Cranial nerve VI (6)
2. Trochlear nerve or Cranial nerve IV (4)
3. Oculomotor nerve or Cranial nerve III (3)

Mnemonics for the Innervation of Extraocularmotor Muscles
• LR6 (SO4) R3

Explanation of Mnemonics
LR6 = Lateral Rectus muscle --> Innervated by CN6 (VI) Abducens
SO4 = Superior Oblique  muscle --> Innervated by CN4 (IV) Trochlear
R3 = The Rest of the 4 eyeball movers --> Innervated by CN3 (III)  

The muscles innervated by CN 3 (III) Oculomotor nerve are
1. Superior Rectus
2. Inferior Rectus
3. Medial Rectus
4. Inferior Oblique

The Oblique muscles take the eyeballs in the opposite direction. For example the Left Oblique is tested with the patient looking Right and .

Mnemonic
Obliques go Opposite (Left SO and IO tested with patient looking right).

I O U: IO tested looking Up.

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