078 The Ligaments of the Acromioclavicular Joint
Watch and learn the answer from today’s episode. Enjoy!
Transcript of Today’s Episode
Now, you remember that the acromioclavicular joint is where the clavicle articuates with the acromion process. That’s what I’m dealing with right here. We have the clavicle and here, we have the acromion process of the scapula, and that’s where they are connecting. Once again, you can see that joint over here also the acromioclavicular joint.
What ligaments do we have?
The first thing I want to point out is right here, we can see the superior acromioclavicular ligament. That’s connecting the clavicle directly to the acromion. And then, on the inferior aspect, we’re going to have a thinner, smaller ligament that’s the inferior acromioclavicular ligament. It’s not indicated in this picture, but just know that on the inferior aspect, we have a thinner ligament and that’s called a inferior acromioclavicular ligament.
How can you tell the difference between the two? Well, the one that’s medial is going to be the conoid ligament. The one that’s lateral is going to be the trapezoid ligament. The trapezoid ligament has a trapezoidal shape. That’s another distinguishing characteristic.
Now, if you are in my Anatomy lab, and we were dissecting a cadaver, and I were to take a thread and tag this entire thing, you would not call it the conoid and the trapezoid ligament. You would call them the coracoclavicular ligament. Since that’s not on here, I’m just going to write it in. That’s the coracoclavicular ligament.
So, if I tag both of them, that’s the coracoclavicular ligament. If I put a string around just the lateral one, you know that’s the trapezoid ligament. If it’s just around the medial ligament, that is the conoid ligament.
Let’s do our brief review quiz.
You can see here, we have the superior acromioclavicular ligament, the inferior acromioclavicular ligament, the trapezoid ligament, the conoid ligament, and if I take them together (looks like a smiley face), that’s the coracoclavicular ligament.
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That’s all for this video. This is Leslie Samuel, and I’ll see you in the next one.