Which anatomy is relevant to digital nerve blocks?

Updated: May 16, 2018
  • Author: Dmitry Volfson, DO; Chief Editor: Meda Raghavendra (Raghu), MD  more...
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Answer

Each digit is innervated by 4 digital nerves. In the upper extremity, the digital nerves arise from the median, ulnar, and radial nerves. The 2 palmar digital nerves innervate the palmar aspect of the digit and the nail bed, whereas the dorsal nerves innervate the dorsum of the digit (see images below). The tibial and peroneal nerves branch off into the digital nerves of the lower extremities, which follow a pattern of distribution analogous to those of the upper extremity. [1]

Palmar digital nerves. Palmar digital nerves.
Dorsal digital nerves. Dorsal digital nerves.

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