Dermatomes of the Head

by Darren Salmi, MD, MS

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    00:01 Now let's take a look at the dermatomes of the head.

    00:05 We'll start by looking at the facial aspect of the head.

    00:09 Superiorly, down over the eyes, end of the bridge of the nose, we have dermatome innervation provided by the ophthalmic nerve.

    00:18 Just below that, coming over the cheeks to the upper lip, we have innervation provided by the maxillary nerve.

    00:27 Then finally below that, going over the jaw, we have the mandibular nerve.

    00:32 And so together, these are the three divisions of the trigeminal nerve.

    00:37 V1, V2 And V3.

    00:41 However, the posterior aspect of the head is going to be innervated by cervical spinal nerves.

    00:48 So we'll swing around to a posterior view to see those dermatomes.

    00:53 We start superiorly with C2 and C3, C4, and C5.

    01:00 And you might be wondering, where's the dermatome provided by C1 and it turns out that C1 doesn't provide any dermatome innervation.

    01:08 C1 is actually motor nerve only.

    01:11 So it only innervates muscles and doesn't provide any sensation.

    About the Lecture

    The lecture Dermatomes of the Head by Darren Salmi, MD, MS is from the course Neurovasculature of the Head.

    Included Quiz Questions

    1. Ophthalmic
    2. Maxillary
    3. Mandibular
    4. C4
    5. C3

    Author of lecture Dermatomes of the Head

     Darren Salmi, MD, MS

    Darren Salmi, MD, MS

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