Brull R, Hadzic A, Reina MA, et al. Pathophysiology and Etiology of Nerve Injury Following Peripheral Nerve Blockade. Reg Anesth Pain Med 2015;40:479-490.

Under the discussion section, in the anatomical considerations paragraph the article reads:

A nerve can be considered a distinct organ composed of neural tissue, a connective tissue stroma, and blood supply. Nerve cells, or neurons, are composed of a cell body, dendrites, and an axon. The axon is a cytoplasmic extension of the neuron that transmits electrical signals along its length from the cell body proximally to any distance from a few millimeters to nearly 1 m distally. Most peripheral nerves transmit both afferent motor and efferent sensory signals. In the peripheral nervous system, the majority of axons have a sheath of Schwann cells that encase the axon in a layer of myelin (figure 1).

There is an error in the penultimate sentence which should read:

Most peripheral nerves transmit both efferent motor and afferent sensory signals.

doi: 10.1097/AAP. 0000000000000125