Nerve Tissue and Impedance

The brain is the only tissue with a large volume of nerve tissue. Nerve tissue elsewhere may be regarded as cables, and electrical cable theory is often applied. The insulating properties of the myelin sheath increase the impedance of myelinated nerves. 

Oh et al. (2011) and Liston et al. (2012) have modeled and recorded impedance changes in nerves during action potentials. More on action potentials can be found in Section 5.2. 

---