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Extraocular muscles Mnemonic – Best Medical Mnemonics

Extraocular muscles:

The extraocular muscles are a group of six muscles that regulate the eye movements. Depend on the position of the eye at the time of muscle contraction, these muscles aid in controlling the eye movement.

Extraocular muscles Mnemonics
The extraocular or extrinsic eye muscles, considering their relatively small size, are incredibly strong and efficient. There are the six extraocular muscles, which act to turn or rotate an eye about its vertical, horizontal, and antero-posterior axes:

Extraocular Muscles

Extraocular muscles movements:

Eye muscles work together with other eye muscles, of the same eye and the opposite eye, to move the eyes in various directions. However, a given extraocular muscle, if working on its own in isolation (without other extrinsic eye muscles in play), would move the front of an eye in a specific direction or directions, as follows:

The primary muscle that moves an eye in a given direction is known as the “agonist.” A muscle in the same eye that moves the eye in the same direction as the agonist is known as a “synergist,” while the muscle in the same eye that moves the eye in the opposite direction of the agonist is the “antagonist.” According to “Sherrington’s Law,” increased innervation to any agonist muscle is accompanied by a corresponding decrease in innervation to its antagonist muscle(s).

Nerve innervations of the Extraocular muscles:

Extraocular muscles are innervated by a specific cranial nerve (C.N.):

 

 

[expand title=”References for Extraocular muscles:”] –http://www.tedmontgomery.com/the_eye/eom.html
http://upload.wikimedia.org/wikipedia/commons/thumb/3/3b/1412_Extraocular_Muscles.jpg/640px-1412_Extraocular_Muscles.jpg
http://en.wikipedia.org/wiki/Extraocular_muscles[/expand]
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