Morphometry of the anterior interosseous nerve: a cadaveric study

Yıl 2018, Cilt: 12 Sayı: 3, 111 - 114, 31.12.2018

Sibel Kibar , Burak Bilecenoğlu Luis Filgueira Aysun Uz

Öz

Objectives: ​Pathophysiology and etiology
of anterior interosseous nerve (AIN) syndrome are still controversial. This
anatomical​ ​dissection study aimed to understand the anatomy of AIN.

Methods: From a random sample of
upper extremities of whole-body human cadavers (n=10), 20 upper extremities
were included​ ​in the study. Two of the cadavers were females and 8 were males
(age range 34–62 years). Specimens were dissected with​ ​the elbow in
extension, wrist in neutral position and forearm in pronation. After
superficial dissection, the pronator teres muscle​ ​was released, and the
branching pattern of the AIN and the separation of the nerve from the
interepicondylar line were​ ​recorded. The branches to the pronator teres,
flexor pollicis longus, flexor digitorum profundus and flexor digitorum
superficialis​ ​were recorded according to their distance from the
interepicondylar line.

Results: The AIN branched from
the main trunk 5.1 to 47.89 mm (mean 37.58±11.25 mm) distal to the
interepicondylar line.​ ​AIN gave off 1–4 branches to the pronator teres. The
first branch left the AIN 10.05–83.84 mm proximal and entered the muscle​
​23.49–43.72 mm distal to the interepicondylar line. AIN gave 1–4 branches to
the flexor pollicis longus, flexor digitorum profundus​ ​and flexor digitorum
superficialis at varying distances. The origin of the branches of AIN, as well
as the innervation by​ ​one or multiple branches for a muscle, was variable.

Conclusion: This study provides a
detailed map of the anterior interosseous nerve innervating flexor pollicis longus,
flexor​ ​digitorum profundus and flexor digitorum superficialis muscles, to
serve as a guide for location of AIN block in patients with​ ​upper extremity
spasticity and AIN syndrome.

 

Anahtar Kelimeler

anterior interosseous nerve, cadaver, morphometry

Kaynakça

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