Turkish Neurosurgery 2021 , Vol 31 , Num 1
Exploring the Morphology of Anterior Interosseous Nerve and Relating It to Its Clinical Conditions
Yelluru Lakshmisha RAO1,Mangala M. PAI1,Peruvaje R. KRISHNAPRASAD2,Bukkambudhi V. MURLIMANJU1,Tonse MAMATHA1,Latha V. PRABHU1
1Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Department of Anatomy, Manipal, Karnataka, India
2Manipal Academy of Higher Education, Kasturba Medical College and Kasturba Hospital, Department of Orthopaedics, Manipal, Karnataka, India
DOI : 10.5137/1019-5149.JTN.29917-20.2 AIM: To study topography and variability in the origin of anterior interosseous nerve; to identify the branching pattern of the anterior interosseous nerve supplying the flexor digitorum profundus, flexor pollicis longus, and pronator quadratus muscles.

MATERIAL and METHODS: The present study included 70 formalin-fixed upper limbs of adult human cadavers. The origin of the anterior interosseous nerve was categorized into 3 types. The morphometric data obtained in this study were represented as mean± SD and the dimensions were given in millimeter. The measurements were compared statistically by using ?EZR software, version 1.38, 2019?. The ?paired t-test? was applied and the ?p? value less than 0.05 was considered as statistically significant.

RESULTS: It was observed that the origin of the anterior interosseous nerve was extremely variable. It was ranging from the midepicondylar point of the elbow joint up to as below as 86mm from it. The distance of its origin from the midpoint of the pronator teres muscle ranged between 70 mm above the pronator teres muscle to 22 mm below it. In one of the forearms, the median nerve supplied the medial two tendons of the FDP, instead of the ulnar nerve.

CONCLUSION: The present study provided additional information about the origin, topography, and distribution of the anterior interosseous nerve. The data will provide further insight into the causes of nerve compression syndromes. It will also help in planning the surgical approach into the distal humerus, elbow joint, and proximal ends of radius and ulna, without causing any nerve injury. Keywords : Compartment syndromes, Median nerve disease, Median nerve, Anterior Interosseous Nerve, Neuropathy

Corresponding author : B.V. MURLIMANJU, flutemist@gmail.com