third metatarsophalangeal joint. S1 – On the lateral aspect of the calcaneus. S2 – At the midpoint of the popliteal fossa. S3 – Over the tuberosity of the ischium or infragluteal fold S4 and S5 – In the perianal area, less than one cm lateral to the mucocutaneous zone Following is a list cranial nerves responsible for sensation from the face: V1 (1st division of the Trigeminal nerve) - associated with Herpes zoster ophthalmicus V2 (2nd division of the Trigeminal nerve) V3 (3rd division of the Trigeminal nerve) Additional images See also Cutaneous innervation Dorsal root Peripheral nerve field References External links 3D Dermatomes Web App, Instamedic Diagram "Adult Dermatome", The New York Times somatosensory system Neurology Skin anatomy