hello everyone how are you doing today so this is dr ayan from the veterinary anatomy channel and today we will talk about the anatomy of the abdominal muscles in the dog so let's get started [Applause] [Music] so now we will talk about the abdominal muscles and let's start with the external abdominal oblique muscle the external abdominal oblique muscle which we can see here originate from the lips as you can see here there this is all the origin of the external abdominal oblique muscle and from the thoracolumbar fascia so from the lips and from the thoracolumbar facia and inserts of course mainly on the linear elba as you can see here and on the in your pubic eminence so if we cut you know the external abdominal oblique muscle in this area very carefully it's a very thin muscle and reflected up and down as you can see here so we can see under it the internal abdominal oblique muscle so let's just reflect it this way and that way here down and here now we can see the internal abdominal oblique muscle so here the internal abdominal oblique muscle originates from the thoracolumbar fascia from the coxal tuberosity and from the inguinal ligament inserts as you can see here to the linear alba this is the linear alba here so to the linear alba at the same time to the coastal arch or the last trips here if we compare between the internal abdominal oblique muscle and the external abdominal oblique muscle you will find that the muscle fibers of the internal abdominal oblique muscle are oriented cranioventrally as you can see here while the muscle fibers of the external abdominal oblique muscle are oriented caudo caudo ventrali so this is the external and this is the internal muscle fibers now we will try to cut the internal abdominal oblique muscle also in the middle somehow to be able to see the transverse abdominis so as we said before if we cut the internal abdominal oblique muscle in this way here and separate it very very carefully of course because it's a very thin muscle adhere somehow to the next muscle under it which is the transverse abdominis muscle so let's separate it and you know dissect it up and down in this case we can see the third layer of the abdominal muscle which is the transverse abdominis the transverse abdominis originate from the transverse processes of the lumbar vertebrae and from the coastal arch or from the lost ribs here and in cerse to the linea album if you look at the muscle fibers of this muscle they are transfers like vertical as you can see and at the same time here very specific for the transverse abdominis where we can find this white lines on the muscle these white lines are actually the ventral branches of the lumbar of the lumbar spinal nerves and in this region here are actually the intercostal nerves so these white lines are nerves nerves for the innervation of course of the transversus abdominis and other muscles in this region again that transfers the abdominus orginate from the transverse processes of the lumbar vertebrae and from the coastal arch inserts to the linear alpha so now let's look at this fairly long muscle it's the straight muscle of the abdomen or the rectus abdominus director's abdominus muscle originates from the ventral surface of the sternum so here we can see the above neurosis of this muscle so from the ventral surface of the sternum and from the coastal cartilage and inserts finally on the bacter of pupis via the pre-bubig tendon and at the same time you know it's also inserts to the linear alba medially so here it's very important to mention that the rectus abdominis or the straight muscle of the abdomen while it's moving cowardly it goes also deeply that means in the cranial part of this muscle we will find that this muscle is covered from outside with just the abdomen roses of the external abdominal oblique muscle while the abu neurosis of the internal abdominal oblique muscle and the transversus abdominis in this region here are internally to the rectus abdominus while in the umbilical region here you will find how the rectus abdominis moves one level deeper and in this region we will find that the external lamina of the rectus sheath is includes actually the abnormal roses of the external abdominal oblique muscle and the habonerosis of the internal abdominal oblique muscle and after that we have the rectus abdominus on the internal surface in this region we have the abu nerosis of the transfers abdominus so in the umbilical region the external lamina of the rectus feet includes the abundant roses of the external abdominal oblique muscle the habanerosis of the internal abdominal oblique muscle while the internal lamina of the rectus sheath in this case includes the lamin the habaneros of the transfers abdominis and of course from inside we have the internal facial which is the transverse alphisia here and the abdomen in the caudal region of the abdomen in this case we can find how the rectus abdominis moves one layer deeper and here we can see how the even the neurons of the transverse abdominal muscle transfers abdominis here moves uh to the outside layer so that means the external lamina of the erector sheath in the cauda region here includes all the abnormal roses of all abdominal muscles including the external abdominal oblique muscle the internal abdominal oblique muscle the neurosis of the transfers abdominis and after that we have the muscle the rectus abdominis which is covered internally here just by the internal fascia or the what's called of course the transversal fascia here in the abdomen so this is here the rectus abdominis or the straight muscle of the abdomen again originate from the sternum ventral surface of the sternum from the coastal cartilages here and then cells to the big tendon to the victim of pubis the rectus abdominis or straight muscle of the abdomen [Music] sweetie