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The Posterior Auricular Nerve

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Dr. P here with the 7th nerve.

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Just want to say a few words about the

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distal branches of the 7th nerve.

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You may have gotten the impression the posterior auricular

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nerve comes off over here.

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It actually comes off right as the nerve

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leaves the stylomastoid foramen.

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It's not a nerve that you can see,

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but you can follow the facial nerve down.

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And you should as it exits the brain.

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There you have it, right there.

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Still have it,

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still have it,

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still follow it.

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And now, it is starting to head towards the parotid gland.

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So, I just want to say a word about

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the posterior auricular nerve again.

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It controls movements of some scalp muscles around the

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ear as a branch to the posterior belly of digastric,

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as well as the stylohyoid muscle.

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The reason I mention it is nobody ever

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thinks about what that nerve does.

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And then as it moves into the parotid gland,

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you remember the mnemonic,

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Two Zebras Bit My Cow.

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And this formulates

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the mnemonic for the branches in the parotid plexus,

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temporal, zygomatic, buccal, marginal mandibular,

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and cervical branch.

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So now, I'd like to move on

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and cover in the next vignette

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the petrosal nerve, which is an important one.

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Description

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Tags

Temporal bone

Salivary Glands

Neuroradiology

MRI

Head and Neck

Brain

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