Anatomy B/C

[mali_16]

I agree with you "tclme elmo."
I can't seem to understand whether it is extensor carpi radialis brevis or longus.
Can somebody clarify?
I also have another question: Is it really necessary to know ALL the national stuff in order to do really well in State? What did you guys do?
I have only a week left and I am still freaking out.

[AlphaTauri]

I sent in a clarification to soinc a couple months ago about whether "extensor carpi radialis" referred to the longus, the brevis, or both and they replied that it meant both.

Hope that helps.

[tclme elmo]

So shouldn't they have different origins, insertions, and functions? Should you just say both origins inertions and functions if it's asked?

[AlphaTauri]

I guess. You might want to ask the guy proctoring the PA State test before the event because I doubt you'll get a clarification from soinc in 10 days.

[tclme elmo]

I kind of get it, but not really: what's the difference between frontalis and occipitofrontalis? Do they have different functions? I have that they have different origins and insertions, but about function...?

[mali_16]

there is a big difference actually.
A) They are in different locations. The occiptofrontalis is located on the occipital bone and the frontalis is located on the frontal bone.
B) The frontalis primarily aids in frowning while the occipitofrontalis has a smaller role. It will raise the eyebrows and will wrinkle the forehead but since it is at the back of the skull it wouldn't do as much as the frontalis.
Hope it helps.

[tclme elmo]

there is a big difference actually.
A) They are in different locations. The occiptofrontalis is located on the occipital bone and the frontalis is located on the frontal bone.
B) The frontalis primarily aids in frowning while the occipitofrontalis has a smaller role. It will raise the eyebrows and will wrinkle the forehead but since it is at the back of the skull it wouldn't do as much as the frontalis.
Hope it helps.

I do have that the occipitofrontalis raises the eyebrows and wrinkles the forehead, but I also got that for the frontalis. How does the frontalis PRIMARILY aid in frowning if it's basically up in the forehead?

[mali_16]

Ok, I understand your concern. Think of it this way: the frontalis is part of the occipitofrontalis. The frontalis is the section over the forehead but the occipitofrontalis is at the back of the forehead. It originates in the occipital bone. When you frown, notice that the pressure is applied on the forehead. There isn't much that your back of the head is doing which is why the frontalis PRIMARILY aids in frowning and raising your eyebrows.

The frontalis and occipitofrontalis is attached with layer of fibrous connective tissue called the aponeurosis. The occipitofrontalis is divided into two sections at the front and at the back of the scalp. The frontalis is the section over the forehead, arising from the skin, overlying the eyebrow and passing back to become continuous with the aponeurosis.
I have added a visual for you to understand.
http://en.academic.ru/pictures/enwiki/7 ... ntalis.png

Hope this helps

[tclme elmo]

OMG THANK YOU SO MUCH. No wonder you got first in anatomy! You're amazing!
So, for clarification: origin, insertion, and function for each?

[mali_16]

Well, its only 1st at regionals. Thanks
I am glad I helped. When is your state exam? I am personally freaking out