Annulus of Zinn contents (mnemonic)

A mnemonic to remember the contents of the tendinous ring (also known as the annulus of Zinn) from superior to inferior is:

• One Canal, Several Orbital Nerves In One Annulus

Mnemonic:

• OC: optic canal
• SO: superior division of oculomotor nerve
• N: nasociliary nerve
• IO: inferior division of oculomotor nerve
• A: abducens nerve