 I've got my Mv1 students here with me and we have completely exposed the axle on the right side of this cadaver. This is a supine cadaver on the right side. So we have abducted the right arc and we can see the contents of the axillary. This is the lateral boundary. This is the medial boundary of the axillary force. Straight away in front of us we can see this structure here. This is the axillary main. And we can see the axillary main is formed by the union of the V-net comitantes of the brachial artery and the basalic vein which continues up as the axillary vein. And we can also see that the axillary vein is receiving this big vein here. This is the cephalic vein. This cephalic vein pierces through the crostocoronate membrane and it opens into the axillary vein. We have this structure here which I have lifted up. This is the axillary artery. As we know the axillary artery has got three parts. The first part is from the outer board of the first strip to the pectoralis minor which has been reflected here. The second part is behind the pectoralis minor and the third part is from the pectoralis minor to the teres major. This is the teres major. So this is where the axillary artery ends and after that it becomes the brachial artery. So the first part has got one branch and we can see the first branch here. I have lifted it up here. This is the superior thoracic artery. It supplies the upper part of the chest wall. Now let's come to the second part of the axillary artery. The portion which is behind the pectoralis minor. We can see this branch here. It is running on the surface of the chest wall. This one. And it is running on top of the ceritus anterior and it is accompanied by this nerve here. This is the lateral thoracic artery and the accompanying nerve is the long thoracic nerve on the belly. It runs on the surface of the lateral side of the chest wall and this is the one which also gives lateral mammary branches to the femal breast. Then we have the thoracoachromial artery and that is this one here. The thoracocromial artery also pierces through the costocoroquate membrane which was pierced by the same cephalic vein and the thoracocromial artery after it pierces through the costocoroquate membrane it gives four branches. A clavicular branch, a deltoid branch, a pectoral branch and an acromial branch. Those branches we cannot see here. Now we are in the third part of the axillary artery. This is the third part and we can see three branches. This is the anterior circumflix, humeral artery. This is the posterior circumflix, humeral artery. And this branch, the big branch that we see here, this is the last branch of the third part and that is called the subscapular artery. The subscapular artery runs medially and it divides into a circumflix capillary which runs through the triangular space and it also forms a paripodorsal artery which runs on this muscle here, that is the leximus dorsi. And thereafter, after the lower border of the T-D's major, the axillary artery becomes known as the brachial artery. Now we are going to demonstrate the cords of the brachial plexus and the terminal branches. As you know, the roots and the trunks of the brachial plexus are not visible here because they are present in the neck. The divisions of the brachial plexus are in the cervical axillary canal which is also not visible here. What we can see in the axillary are the cords of the brachial plexus and the terminal branches. So let's identify the cords of the brachial plexus. This is the lateral cord of the brachial plexus. It is called lateral cord because it is situated lateral to the axillary artery. And this is the one which is situated behind the pectoralis minor which has been reflected here. Then we have this one. This is the medial cord of the brachial plexus because it is located medial to the axillary artery. And we have this cord here which is the posterior cord. Now let's take a look at the terminal branches. Terminal branches are strictly speaking not part of the brachial plexus. They are out of the brachial plexus. Arising from the lateral cord, we have this nerve here. This is the muscular cutaneous nerve. And we know the muscular cutaneous nerve disappears under the attachment insertion of the coracobrachialis muscle which is here. And thereafter it supplies the coracobrachialis, the biceps and the brachialis. This is the lateral root of the median nerve which is also rising from the lateral cord of the brachial plexus. Now let's take a look at the medial cord of the brachial plexus. We can see this is the medial root of the median nerve. The lateral root of the median nerve and the medial root of the median nerve, the two of them united from the median nerve which I have lifted up here. And the median nerve accompanies the brachial plexus. And then we have the rest of the medial cord which is continuing down. This is the ulnar nerve. And also rising from the medial cord we have this one. This is the medial cutaneous nerve of the arm and the medial cutaneous nerve of the forearm. Now we have retracted all the structures to show the posterior cord of the brachial plexus. And I am removing some of the fascia here to show the posterior cord even more clearly. This is the posterior cord which I have lifted up. And you can see the posterior cord is very big and posterior cord gives rise to two major branches. This one is the first one. This is the axillary nerve. The axillary nerve goes through the quadrangular space accompanied by the posterior circumflex humeral artery which is this one. And it supplies a deltoid muscle and the dT-spina. And thereafter it pierces the deltoid muscle and becomes cutaneous. Inferior dislocation of the shoulder joint actually now can be endured. The rest of the posterior cord continues as the radiate nerve. And we can see this as the radiate nerve here. We can see it through the triangular interval and it disappears behind the humerus through the radiate groove. And it supplies the structures in the posterior aspect. So therefore we have seen the lateral cord of the brachial plexus. The muscular cutaneous nerve. The lateral root of the median nerve. The median root of the median nerve, I mean the median nerve. Then we have seen ulnar nerve, the median cutaneous nerve, the arm of the forearm. The posterior cord of the brachial plexus. The axillary nerve and the radiate nerve. Finally, before we conclude, this is the composite fat and the lymph nodes that we have descended out from the axillary nerve. And these are the lymph nodes which are present at the axillary nerve. And if we feel them, we can feel the collections of aggregates of lymph nodes. The lymph nodes are divided into a pectoral group which are in relation to the pectoralis major muscle. A sub-scabular group which are in relation to the latsomus dorsi and the delis major. Then we have the humeral group which are in relation to the humerus. Then all of these drain into the central group of lymph nodes which are located behind the pectoralis minor. And from there they go to the apical group of lymph nodes. And from the apical group or the infraclavic group, they go to the supra-clavicular. So these are the complete list of contents of the axillary nerve that we can see here. Thank you very much for watching. Dr. Sanjay Sanyal signing out. My only one students are my assistants. If you have any questions or comments, please put them in the comment section below. Have a nice day.