Article

Agenesis, functional deficiency and the common type of the flexor digitorum
superficialis of the little finger are reported in the literature to be highly
variable with significant discrepancy between clinical and cadaveric frequencies.
The aim of this systematic review was to generate overall clinical and cadaveric
weighted frequencies, along with ancestry-based, side-based, sex-based and
laterality-based frequencies.
A systematic literature search identified 34
studies including 12,213 forearms/hands that met the inclusion criteria.
Functional deficit of the FDS tendon of the little finger was significantly more
prevalent among Iranian and Caucasian populations as compared to Indian, East
African and Chinese populations. The weighted "clinical" frequency of functional
absence of the FDS tendon of the little finger was 7.45%, while prevalence of the
common type was 37.5%. The weighted "cadaveric" prevalence of muscle absence of
the FDS-5 in the forearm was 2.5% while tendon absence in the hands was nil. An
expanded examination technique proved to be the most accurate test for FDS
function. In case of injury, inadequate knowledge of different connections or
substitutions of the FDS-5 could lead to a total loss of flexion of the little
finger. These findings support the hypothesis of a dual origin of the FDS-5 where
the muscle portion originates in the forearm, while the tendon portion originates
in the hand.
CI - Copyright (c) 2018 SFCM. Published by Elsevier Masson SAS. All rights reserved.
- Auriculaire

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