hello all this is dr alsup and welcome to station number six where we are talking about the joints
that are located in the elbow region oftentimes these are kind of all lumped in as the elbow joint
but as we discussed in our lecture videos really this is a complex of three separate joints
that are going to be wrapped up in one articular capsule so typically what we think of as the elbow
joint is the humeroulnar and that will be between the trochlea and the trochlear notch of the ulna
and so this right here is going to be the humero ulnar aka the elbow joint um but
kind of moving along with it will be the humero radial joint which will be between the capitulum
and the superior portion of the head of the radius so this is going to be the humero radial
and then we have two capsular ligaments that are also going to be collateral ligaments so
thickening of the articular capsule and you will have one on either side you'll have one on the
medial side and one on the lateral side and i know this is medial because there's that larger
medial epicondyle also you have the ulna right here and the radius here on as always medial so
this right here which i'm going to outline is the ulnar collateral ligament and this is um going to
extend from the medial epicondyle that distal portion of medial epicondyle all the way to the
coronoid process and even have some attachments to the olecranon on the more posterior portions
it's really three bands of ligaments that look like one and certainly only looks like one here
on this image on the opposite side of the lateral side we will have the radial collateral ligament
and this is going to extend from the lateral epicondyle and it will actually blend with this
ligament right here referred to as the annular ligament of the radius and it's annular it is
completely encircling the periphery of the head of the radius and so you will have that intermingling
of the fibers of the radial collateral ligament with the annular ligament and that leads us to
that third joint between the head of the radius and the radial notch of the ulna and that
is going to be in this general region right here with some overlap of that annular ligament because
it's going to attach there as well and this is the proximal radial ulnar joint so that's the
first of those joints between the radius and the ulna that annular ligament like i said is going to
be between the head of the radius and the radial notch and you can't really see the capsule of the
proximal radioulnar just because that that um the annular ligament is really kind of
reinforcing that capsule and you that's mainly what you see there
and this is going to allow for that rotation in this pivot joint that you have here at the
proximal radial ulnar joint so that pronation when you have the rotation of the radius along the ulna
and so those are the joints and the ligaments that we want you to be able to identify in this
region really i would change this to joints of the elbow region even though it is going to be on
that distal end of the arm but really it's kind of moving a lot of the forearm region here all right
excellent thanks for your time and attention here please make sure to reach out if you have
any specific questions about how to identify these structures and i thank you for your time