See Also: foramen of Arnold(medicine)
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Arnold (as used in expressions)(encyclopedia)
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foramen of Arnold (medicine)


foramen of Arnold -->
petrosal foramen


An occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, which transmits the lesser petrosal nerve.

Synonym: foramen petrosum, canaliculus innominatus, foramen of Arnold.