Monday, December 13, 2010

Let's Learn Brachial Plexus.

Salam Alaik

Brachial Plexus

Exam of Anatomy just around the corner. It's all about Upper Limb. As one of the ways to revise, I'll explain or tell about Brachial Plexus briefly. Of course this post will be in English, as I will answering the questions in English(or more apporiately to say that it is Franco Arabic).

Ok, let us continue with the lesson.

To understand what is Brachial Plexus, you must know what is Brachial Plexus.

Brachial Plexus, is a plexus of nerves which is formed by the union of ventral Rami of the lower 4 cervical nerve and the upper Thoracic nerve(1st).

Stages of Brachial Plexus

Roots-->Trunks-->Divisons-->Cords--> Branches.

It just same likes the parts of a trees.

a tree.


C5, C6, C7 , C8 and T1.


Upper Trunk- union of C5 and C6

Medial Trunk- C7 only.

Lower Trunk- union of C8 and T1.


All the trunks divides into Anterior and Posterior divisions.


Lateral Cords- the union of the Anterior Divisions of  of the Upper and Middle Trunk.

Medial Cords- the posterior division of the Lower Trunk only

Posterior Cord-the union of the all posterior divisions of the three trunks.


Brachial Plexus have all branches in all parts except at the Divisions.

So, we start to discuss it from the Roots.

Branches in the Root

1) Dorsal Scapular Nerves

2)Long Thoracic Nerve

3) A branch of C5 to join the Phrenic Nerve.

4) Branches from all roots to supply the scaleni and longus colli muscles,

Branches in the Trunks

Eligible only in the Upper Trunk

1)Supra-scapular nerve (supply the supraspinous and infraspinous fossa)

2)Nerve to the Subclavius Muscle.

Branches in the Cords.

Lateral Cord

1) Lateral root of median Nerve

2)Lateral pectoral Nerve

3)Musculo-Cutaneous Nerve

Medial Cord

1) Medial root of Median Nerve.

2)Ulnar Nerve

3)Medial Cutaneous Nerve of the forearm

4) Medial Cutaneous Nerve of the Arm

5) Medial Pectoral Nerve.

Posterior Cord

1) Upper subscapular Nerve

2)Lower subscapular Nerve

3)Nerve to latssimus dorsi, Thoraco-Dorsal Nerve

4)Axillary Nerve

5)Radial Nerve.

To understand Brachial Plexus better, look at this picture.

Side of Brachial Plexus in our body.

Video related to Brachial Plexus

Then, this is the video related How To Draw Brachial Plexus in 10 seconds

Ok, that's all~

Sorry for all the mistakes. Do correct me,if I'm wrong.

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