okay the next video is going to review the temporal bone and its bone markings as well as the different sutures that you can find um on the skull so this is an individual temporal bone right here just to orient yourself with the skull this bone is coming out of each of the sides in this case we're dealing with the left side of the skull so we're looking at the left temporal bone um but there's also a right temporal bone so just again to orient oursel this hole or cavity which we'll learn the name of in a second is that one right here so um things that you need to identify the zygomatic process so the zygomatic process extends outward this way it kind of comes off um however this one's broken off so if we're looking at this the complete skull this entire thing right here is the zygomatic process just broken here the other thing that you need to identify is the mandibular fausa the mandibular fet is right behind the zygomatic process and it's this smooth area down here so if we're looking on the complete put together skull this little Ridge area in here this is the mandibular fossa um both of these the zygomatic process and the mular fossa are in a region of the temporal bone that we identify as the squamous region so this would be the squamous region and the tanic region is where we're going to find the um the external acoustic metus so if we're looking at this individual temporal bone this larger hole that I was trying to or Orient you with earlier this is your external acoustic meus if we're looking at the the skeleton put together I'm sorry the skull put together this is your external acoustic meus so the larger hold on the outside external acoustic meus so that's the only thing that's going to be in your tanic region um other structures that you need to find are in the petus region so we're going to see most of those um inferiorly and on the internal surface so the first one that you need to identify is the mastoid process and that's this behind our external um acoustic meus this little ridged area down here so that's your mastoid process over here on the complete uh skull this is your mastoid process right there um you also need to identify your styloid process and that's why I liked this uh temporal bone that I picked out right here even though it's missing some of the zygomatic process is that you can see this tooth like or Fang like extension um underneath the external acoustic and this is your styloid process so mastoid process styloid process if we're looking at the skull here this is your mastoid process and then we can see right here let me get closer up the styloid process sticking down um you also need to identify the cored canal and the internal acoustic meus so we need to go inside for that so if we're looking for the internal acoustic meus this is your internal acoustic meus right here um if you look I don't know if you can tell there is it looks like a pencil dot there but it's not a complete through hole or Canal the acoustic acoustic minus it's not represented that way so it's just an indentation in this bone right here and that's how you're going to differentiate the internal acoustic metus from the ktic canal because if you look here there's a complete hole going all the way through this is your internal cortic canal and I can actually stick um the stick through it so you could see it like this saying name this canal in this direction or we could have it like in this direction basically if it's in your temp bone that's the only Canal you need to know so if a stick is able to go all the way through it it's going to have to be your kateed Canal now we looking at our skull we have to go in and kind of look more like this so um this is the in inside I don't know if you can see it too well um right here again again we're looking for the internal acoustic meus and it's not a complete hole um that we can actually stick our stick through so this is the internal acoustic meus if we're going to the other direction and you see this hole right here right there that hole is going to be your kateed Canal so you can see the cored canal [Music] represented with a stick like this going through it and say name this hole or you could see it going from this direction and saying name this hole right here and so you would have to know from either direction that the stick is running through the kateed canal so those are the bone markings for the temporal bone and let's move on to the sutures let me put together the skull okay so let's start with the first one on your lab and that's your corono suture so just to orient us this is the front um the corono suture is going to be the suture right here going across this way so if you remember your directional terms if we did a frontal or coronal cut that would be a cut that's going to um divide our body into front and back sides or anterior and posterior division so that's the same thing um when we talk about a suture it's named for the plane that it would make so this is our frontal or coronal suture same thing when we talk about sagittal so if you remember what sagittal is that um plane is going to be one that divides the body into right and left halves so directly behind it the one running through the center this one right here this would be your sagittal suture we're going to the side now and now we can see our um temporal bone right here we are going to have um another suture that outlines that and that's going to be your squamous suture right there so squamous scure is going to follow right along here basically outlining um the majority of the temporal bone the lamboid suture is going to outline the perimeter um Superior portion of the occipital bone so this is our occipital bone in the back here and now we can see this is our lamboid suture right there the tricky one which maybe it's harder for you to find um online would be the occipito mastoid suture so this is our mastoid process right here this is our occipital bone so this suture is actually going to run between the two so if we continue down our lamboid suture and where our um s is suture where these connect you'll see another suture come down um that's going to divide basically the mastoid region from the occipital region so that's how we get the oipal mastoid suture right here so this bottom part inferior this is the occipito mastoid this one outlining your temporal bone is your squa suture the one outlining your hold on occipital bone in the back this is your our lamboy suture and then we have our sagittal suture right here and then our frontal or coronal suture right there and that's it for this little video