Parasympathetic Ganglia Anatomy of the Head and Neck
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Dr. P here talking about the ganglia of the head neck,
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and I want to focus on the parasympathetic ganglia.
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There are four of them in the head and neck,
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two of them are visible here at the pterygopalatine ganglion,
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also known as Meckel's ganglion.
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The nasal ganglion and the sphenopalatine ganglion.
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Then we've got this one below
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the submandibular ganglion,
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an important one, and two that do not appear in
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this classic drawing from Grey's Anatomy,
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the ciliary ganglion,
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which controls the sphincter pupillae
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of the sympathetic nervous system via V1,
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and parasympathetics via the third nerve.
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Then we've got the otic ganglion.
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That's the one that's kind of oft-overlooked.
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It's located inside the mandibular condyle,
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really hard to kind of place it right here,
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but I'll just got to put it in this region.
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It's not an exact placement,
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but just to talk about its function and its
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associated with the tensor tympani and tensor veli
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veli palatini with parasympathetic function via nerves 7 and 9.
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Then we get into the two that were most
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interested in that are drawn in here.
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Again, the pterygopalatine ganglion and the maxillary ganglion.
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The pterygopalatine ganglion supplies
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the lacrimal and the nasal cavity
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via the fifth nerve, and the vidian nerve.
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We'll talk a little bit more about it in a second.
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And the otic...
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Sorry.
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And the submandibular ganglion
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provides secretory function to the
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submandibular glands and the sublingual glands,
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receives quite a bit of information and
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support from the corda timpani from the 7th nerve.
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So now, let's have a look on MRI of our
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parasympathetic ganglia and their association,
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or lack thereof with cranial nerve
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5 in the head and neck.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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