Location of nerve entry points of flexor digitorum profundus

K. Hwang, S. Jin, S. H. Hwang, K. M. Lee, S. H. Han

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27 Scopus citations


The aim of this study was to elucidate the anatomical location of nerve entry points of Flexor digitorum profundus (FDP) and its implications for non-surgical neurolysis. A total of 21 amputated forearms of 11 Korean fresh cadavers were dissected. Two transverse x-axes joined the medial and lateral epicondyles and the radial and ulnar styloid processes. The longitudinal y-axis joined the midpoints of the proximal and distal transverse x-axes. The locations of the points were marked relative to the forearm length (x) and forearm width (y). The number of nerve entry points from median nerve and ulnar nerve were average 3.91 ± 0.62 (range 3-5, median 4) and 2.14 ± 0.65 (range 1-3, median 2) respectively. Most (82.9%) nerve entry points of FDP from the median nerve were within two circles, with 15 mm diameter. The two circles were on medial 1/10 of forearm width from the y-axis, and on proximal 1/3 (1:2) and 2/5 (2:3) of forearm length on x-axis. Most (80.0%) nerve entry points of the ulnar nerve innervating FDP were within a 15 × 30 mm rectangle. Its center was located at +26.5% on x-axis and -36.0% on y-axis. The nerve entry points used to be selected in performing non-surgical neurolysis with either ethyl alcohol (50%) or phenol (5-12%).

Original languageEnglish
Pages (from-to)617-621
Number of pages5
JournalSurgical and Radiologic Anatomy
Issue number8
StatePublished - Dec 2007

Bibliographical note

Funding Information:
Acknowledgments We would like to express our thanks to Dr Robert S. Chung, MD, FACS, Genetic Institute, Orange County, CA, for reviewing this manuscript. We are also grateful to Kwan Hyun Yoon, M.A. for his illustrations. This work was supported by grant (R01-2005-000-10018-0) from the Basic Research Program of the Korea Science and Engineering Foundation.


  • Anatomy
  • Forearm
  • Median nerve
  • Skeletal muscle
  • Ulnar nerve


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