IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-6-9-11950 Original Research Paper Study of median nerve and its variations, communications and relations in thirty four formalin preserved cadaveric human brachial plexuses Dr. Shalik ram adhikari Dr. Geeta Yadav Dr. September 2017 6 9 01 02 ABSTRACT

 BACKGROUND

Brachial plexus is a principle somatic nerve plexus supplying the upper limb situated in the posterior triangle of the cervical region and in the axillary region. The plexus is a result of union of anterior rami of inferior four cervical nerves (C5, C6, C7 and C8) and the anterior ramus of the first thoracic nerve (T1), with variable contribution from C4 and T2.

In normal anatomy, the brachial plexus is described to have roots, trunks, divisions, cords and terminal nerves [Bannister et al]1 and median nerve is one of the nerve of Brachial plexus.

Variations involving the median nerve are not uncommon and have been linked with factors influencing the mechanism of limb muscles and peripheral nerves development during embryonic life.

Knowledge of variations in anatomy is important to anatomists, radiologists, anesthesiologists and surgeons, and has gained more importance due to the wide use of computer imaging in diagnostic medicine.

MATERIAL & METHODS

The study was conducted in the Department of Anatomy, SARASWATHI INSTITUTE OF MEDICAL SCIENCES.

Case sample

Thirty–forty human brachial plexuses (15–20 formalin preserved adult cadavers)

Instruments and chemicals used:

1.      Scalpel

2.      Blunt forceps

3.      Fine forceps

4.      Scissors

5.      Bone cutter

6.      Calipers

7.      Scale

8.      Gloves

9.      Facemask

10.  Acetone

11.  Colored Paints (Yellow, Black & Red)

12.  Painting Brush

Method:–

The brachial plexus was dissected on both sides in approx. 15–20 formalin preserved adult cadavers. Lateral side of the neck, axilla and arm was dissected to expose the entire extent of brachial plexus. The various components of brachial plexus were delineated by careful fine dissection. Adequate care was taken to preserve its relations to important surrounding structures. The brachial plexus was studied systematically, noting the median nerve, its variations, communications and relations.

 

OBSERVATIONS

The observations recorded in the present study pertained to the dissection of human brachial plexus and studying Median nerve and its variations, communications and relations.