all right hello anatomy friends this is dr. Alsup and in this video we will focus on how to identify
the pertinent osteological structures for the inferred temporal fossa session and as seems to
be a running theme in this course there is a lot of spheroid bone but the temporal and the mandible
will make some appearances as well so let's get started okay we are starting with an inferior
view of the cranium and take a moment and on your own try to identify where the greater wing of the
sphenoid is located so take a moment pause if you need to and if you're ready I hope you're
looking in this general region right here-ish and I know this because I can see the foramen
ovale right here and the foramen spinosum the foramen ovale is obviously quite important for
this session as it allows the exit of v3 or the mandibular nerve into the infra temporal fossa
and then the middle meningeal artery is going to a send through the foramen spinosum in order to
get into the cranium so that's a branch of the maxillary artery this smooth portion right in
this region is referred to as the impro temporal surface so you can even put it a little bit more
laterally as well so this region here and this is going to form the roof or the superior boundary of
the import import fossa all right last thing that we want to identify on the sphenoid bone is going
to be the lateral plate of the pterygoid process which you I'm going to label right here on this
other side so this will be the lateral plate this would be the medial plate which we don't have to
identify for this session but it's nice to review that recall that the medial pterygoid muscle will
attach on the medial side of the lateral pterygoid plate and the lateral pterygoid muscle will be on
the lateral side also that lateral plates going to form the medial boundary of the infra temporal
fossa all right moving to the temporal bone let's make sure we are comfortable with the
petrotympanic fissure and recall that I always say find that mandibular fossa and then go just
posterior to it you have that very thin fissure this is how the court of timpani is going to exit
the skull and the less talked about anterior tympanic artery will actually enter the skull
via the small seizure okay one of my all-time favorites is the tear go maxillary fissure which
you can see here is a fairly large fissure that's going to be between the posterior portion of the
maxilla and the pterygoid process the sphenoid so it's going to be what I just outlined right
there and you can see that this looks like it is leading into deeper regions and it
absolutely is it is leading into the tear go Palatine fossa and that pterygopalatine fossa
is a space between them for temporal fossa in the nasopharynx we will have a whole session focused
on this region but for our purposes now we'll start with the pterygomaxillary fissure it's
also at the pterygomaxillary fissure that the third part of the maxillary artery really begins
occasionally we will give off a branch right before and finishing with the mandible we are
looking at a Hemi sectin medial view so looking at the medial side of the ramus of the mandible
so ramus of the mandible here you can see the neck is going to be this pinched end region right under
the right under the mandibular condyle will be the neck of the ramus or the condylar process
you'll see it either way and then here is the mandibular foramen and we are gonna love this
mandibular foramen without me telling you try to see if you can recall which nerve will enter
into this foramen so very important in terms of a fair and innovation to the mandibular teeth it's
the inferior alveolar nerve the I am yeah I'm sure you got it right if you didn't I bet you're real
to getting that concept down all right so that's all the osteology for this video as you review the
identification portion make sure you take the time to think of why we have you know these structures
so what attaches here what traverses this foramen and the like so kind of put those concepts
from the learning objectives together with the the identification and you will have all the
concepts you need to know all right thank you for your time and attention and have an excellent day