 So, this is a quick demonstration of the dissection of the pectoral region. This is the right side of the cadaver. So, the muscle that we see in front of us, this is the pectoralis major muscle. These fibers are which are arising from the clavicle here. These are the clavicular part of the pectoralis major. And these are the fibers which are arising from the sternum and from the costal cartilages and partly from the aponeurosis of the external oblique. This is the sternocostal part and the abdominal part of the pectoralis major. And all these fibers, it's a very powerful muscle and all these fibers then converge. And the fibers then undergo a partial torsion. And they get inserted by means of a narrow attachment to the lateral lip of the intertubular sulcus. There may be a person located at the place where the fibers stern and get inserted. We have divided the pectoralis major here and reflected it to show the structure underneath. We see yet another muscle here. This is the pectoralis minor. This takes attachment origin from the second, third and fourth ribs. And the fibers then converge and they get inserted onto the coracoid process. And as it crosses, it forms a bridge for the axilla. And this is what divides the axillary artery and axilla lymph nodes into three parts, approximately deep and a distal part. This pectoralis minor is responsible for pulling the scapula down and inferiorly and protraction of the shoulder. I would like to draw your attention to this nerve here. This is the medial pectoral nerve which has been cut here. It comes from deep inside. Which supplies the pectoralis minor and then it pierces the pectoralis minor and it supplies the pectoralis major from its deep aspect. The other nerve which supplies the pectoralis major is this one here. This is the lateral pectoral nerve. It pierces the costa coracoid membrane and it supplies the pectoralis major. So this is about the pectoralis minor. And finally, I would like to draw your attention to this major muscle that we see here. This is the serratus anterior. And we can see multiple digitations of the serratus anterior. One digitation, it actually takes origin from the second to the eighth or ninth ribs. In fact, there is a tubercle on the second rib which is referred to as the tuberosity of the serratus anterior. And all these fibers then converge and they go between the scapula and the chest wall and they get inserted onto the inner surface of the medial wall of the scapula. Point to be noted is this neurovascular bundle that we have dissected out here. We can see this artery here. This is an important artery. It's a branch from the second part of the axillary artery. This is known as the lateral thoracic artery. And this lateral thoracic artery, it runs on the surface side of the chest wall, on the lateral aspect. This is also an important blood supply to the breast in females. And it provides the lateral mammary branches. And accompanying this lateral thoracic artery is this nerve here. This is the long thoracic nerve of Bell, root value C567, which arises from the roots of the brachial plexus. And we can see it is supplying multiple branches to the serratus anterior. Both of them run together on the surface of the chest wall, on the surface of the serratus anterior. And it is here that they are prone to injury, especially during knife fights. And that can lead to paralysis of the serratus anterior leading to winging of the scapula. And finally, while I was talking about the lateral mammary branches, that brought me to the next point. If I were to bring back the pectoralis major to its original place, we see multiple neurovascular bundles coming out and piercing the pectoralis major here, 1, 2, 3, 4, 5. These are the perforating branches of the internal thoracic artery. Especially the second, third and fourth, these are very important in females. They are the main suppliers of the medial mammary branches, which supply the breast from the medial side. As opposed to the lateral mammary branches, we supply the breast from the lateral aspects. And we have to ligate these branches very carefully during mastectomy. So that's all for now. Thank you for watching.