Innervation of the Human Cavum Conchae and Auditory Canal: Anatomical Basis for Transcutaneous Auricular Nerve Stimulation

Figure 3

Sections of the external segment of the meatus acusticus externus cartilagineus (MAEC) stained with Masson’s trichome staining ((a)–(d)) and immunostained for demonstration of neurofilaments ((e)–(g)). (b), (d), and (f) are enlargements of the square in (a). ((b), (d)) Nerves placed inside the cartilage; (f) nerves placed out of the cartilage; (c) and (g) are enlargements of (b) and (f), respectively. A: anterior; I: inferior. Arrows indicate nerve profiles. Scale bar is identical for (c), (d), (e), and (g).

(a)

(b)

(c)

(d)

(e)

(f)

(g)