Sensation of the face

The video tutorial explains the cutaneous innervation of the face through the trigeminal nerve and its three branches: V1 (ophthalmic), V2 (maxillary), and V3 (mandibular). Each branch is responsible for sensory innervation of specific facial regions. The tutorial also covers the testing of facial sensory regions and notes exceptions like the great auricular nerve. Images used in the video are credited to Mark Nielsen.

Explain the sensory innervation provided by the mandibular branch (V3) of the trigeminal nerve.

How does the distribution of sensory innervation differ between V1, V2, and V3 around the eyes and mouth?