[Music] hello everyone and welcome back to another anatomy tutorial where we are going to be talking about the muscles of the neck and the muscles of the shoulder girdle so firstly we will highlight these muscles in pictures and move after the two-day section and in the next tutorial we will remove the folding completely and look at the muscles in details before we start dissection let's look at the muscles which we are going to dissect in this video and as you can see here we're looking at the right side of the horse after removing the skin and the cutaneous muscles so here we can see some of the muscles of the neck and some of the muscles of the shoulder and let's start with the first one highlighted in blue here the trapezius muscle the trapezius muscle has two parts the cervical part and the thoracic part the cervical part of the trapezius muscle originates from the knuckle ligament and inserts to the spine of the scapula which is located here in this area while the thoracic part of the trapezius muscle originates from the spinous process of the thoracic vertebrae and inserts to the spine of the scapula too the next muscle which we can see here is the rhomboid muscle the rhomboid muscle located under the trapezius muscle and has also two parts the cervical part which we can see highlighted in green here the thoracic part located under the trapezius in this area here the cervical part of the rhomboid muscle originate also from the knuckle ligament here and search to the medial surface of the cartilage of the scapula or scapular cartilage which we can find in this area here the next muscle highlighted now is the splenius muscle the splenius muscle originates from the knuckle ligament from the knuckle ligament from the spinous processes of the t3 to t5 and inserts two different regions including the scale as you can see here c1 which is the atlas c 3 c4 c5 and um so here we're talking about the cerapical vertebra number three number one to five but not number two in the horse the next muscle is the ventral serrated muscle the ventral serrated muscle has also two parts the cervical part with which we can see uh highlighted in this picture here the thoracic parts originates from the lips and located under this muscle and under the forelimb so we cannot see the thoracic part but we can see part of the cervical part of the ventral serrated muscle so the cervical part of the ventral strait muscle originates from the transverse processes of the cervical vertebra and inserts like that one of the i mean the the thoracic part to the serrated face serrated faces specific area on the medial surface of the scapula this is the insertion of both the cervical part and the thoracic part of the ventral serrated muscle the next muscle which we can see here is the homo transfers muscle the homo transfers muscle originates from the transverse processes of the first four cervical vertebra and inserts actually in the horse into the facial on the surface of the shoulder region in this area here as you can see this is a part of the homo transferas muscle of course in other animals the insertion area of the homo transfers muscle is the acromion acromion of the scapula but here in the horse there is no acromion that's why this muscle inserts to the facia here of the shoulder region the next muscle highlighted in red here at the latismos dorsi muscle the latismos dorsi or the broad muscle of of the thorax originates from the thoracolumbar fischer this structure we can hear as we can see here and inserts into the tears measured to velocity located on the medial surface of the humerus the next muscle is the subra spinous or supraspinatus muscle the supraspinatus muscle originates from the supraspinatus fossa of the scapula and inserts to the greater tubercle of the humerus while behind the spine of the scapula we have the infraspinous muscle but we cannot see the infraspinous muscle here because it's covered with this muscle the dill to eat muscle so the dill to eat muscle which has two parts in other animals has here just one part which is the scapular part the scabula apart originate from the spine of the scapula as you can see here and from the outside surface of the infraspinous muscle and serous to the dirty tuberosity of the humerus the other part which named in other animals acromial part of the deltoid muscle is absent here because there is no acromion as we mentioned before the next muscle is the um muscle this muscle originates from the deep facia medial to the scapula or medial to the shoulder joint there in this area and originate also from the deep service of the spinatos and subclavius muscles so this is the subclavius muscles and inserts to the hair eat ball this muscle is extremely important as in this area it moves exactly between the external jugular vein and the common carotid artery here we can see the external jugular vein this big vein here and more deeply we can see here part of the common carotid artery next to the common carotid artery there is another very important structure called the symbiotic trunk in this area as we mentioned this muscle moves exactly between the external jugular vein and the the common carotid artery and protect the common cardio artery if you want to take blood or to inject medication into the external jugular vein as we all know that this area here is the best area for blood collection from the external jugular vein the next muscle highlighted in yellow here is the triceps muscle from the neem the triceps muscle has three parts or three heads this one is the lateral head of the triceps muscle this is the long head of the triceps muscle and from the in the medial side we can see the medial head of the triceps muscle all three heads comes together and inserts to the oligranon of the anna the next muscle located just cranial to the scapula here is the subclavius muscle the subclavius muscle is very developed in the horse is less developed in bovine and is absent in carnivores the subclavius muscle originates from the cartilage of the first four ribs and inserts to the surface of the spinatos muscle so here we remove the skin completely under the skin directly we can see the cutaneous muscles including this big muscle the cutaneous tronchi or the cutaneous muscle of the trunk the fiber direction is called the dorsalis here in this region we have another cutaneous muscle the homo brachial muscle the mobilical muscle the name comes from the lesion so omo is shoulder and brachial in the area where we have the brachium or the humerus the ammo brachial muscle as you can see here originates from the thoracic facia the superficial fission and this area and extends down to the facial of the flooring let's move toward the neck and the head looking for the cuteness muscles here eventually we can find this very flat muscle the cutaneous muscle of the neck or cutaneous collie is very flat located ventral protect or hold the other structures here at the caudal angle of the lojo or mandible we can see the cutaneous muscle of the face or the facial cutaneous muscle now let's zoom in here again this is the cutaneous muscle of the face here we can find another muscle this is the barotido auricular muscle if we move the facial cuteness muscle and the parotid auricular muscle to the side here we can see the parotid gland so the bellotted gland is located under these muscles exactly between the two veins which come from this vein this is the external jugular vein the first branch is the maxillary vein here and the other one the lingo facial vein exactly between these two veins we can find the berlotte gland now let's look one more time here do you remember the name of this muscle this is the homographical muscle exactly under the umbrella muscle here we can see the cervical part of the trapezius muscle if you remember we say it originates from the knuckle ligament and inserts to the spine of the scapula so this is the trabicious muscle more ventrally here we have the oma transfer zarya's muscle the homo homotransferasarius muscle um originates from the transfers processes of the cervical vertebra and inserts to the facial because there is no acromion more eventually here we can see the glycocephalic muscle and now let's move to this side here we can see the cervical part of the trapezius muscle and here is the thoracic part of the trapezius muscle both of them inserts to the spine of the scapula cowardly crowded to the four limb here we can see that that is most dorsi so now let's move the cervical part of the trapezius muscle up so to be able to see the more or the deeper muscles here on the scapula lateral surface of on the on the scapula here we can see the supraspinatus muscle the supraspinatus muscle as we mentioned before originates from the fossa from the subgraspinators fossa and inserts to the greater tubercle of the humerus cowardly here we have the deltoid muscle the deal to eat muscle um located on the infraspinatus and in cells to the e tuberosity here crania to the scapula we can see the subclavius muscle is very developed in the horse and some anatomists you know consider this muscle as a part of the bacterial muscles and name it as clavicular part of the bacterial muscle this muscle here is the homotransversarious muscle originates from the transverse brush of the cervical vertebra and inserts to the lateral surface of the shoulder lesion because there is no acromion more deeper here we have the omaha weed muscle the um ohio eat muscle do you remember we say that in the cranial part of the neck moves between the external jugular vein and the common carotid artery and protect the carotid artery in this area here we can find the rest of the homo transfer zara's muscle fuses to the brachiocephalic muscle in the angle between the scapula and the humerus here we have the triceps muscle including the long head this is the long head of the triceps muscle laterally we have the lateral head of the triceps muscle here under the trabicious muscle we can find the rhomboid muscle this is the cervical part of the rhomboid muscle here this is the splenius muscle splenios muscle toward the head this big muscle is part of the serrated muscle this is the cervical part of the ventral serrated muscle originated from the transverse processes of the cervical vertebrae and inserts to the serrated face of the scapula here allow me please to mention this muscle with the fiber direction cloud eventually this is the external oblique abdominal muscle between the lips we can see the external intercostal muscle the external intercostal muscle is one of the inspiratory muscles so finally did we forget any muscle yeah it looks like there is a small muscle here it's a flat muscle located on the long head of the triceps brachii or triceps muscle this is the tensile muscle of the entropy calficia is very flat and inserts to the anterical fissure distance [Music]