humerus flexion
Started by ally1
I assume that 'flexing the humerus' means flexion of the upper arm. If you put your arm down at your side and raise it forward while keeping your elbow straight, you are flexing your arm. The action of the flexion is at the shoulder joint.
http://www.getbodysmart.com/ap/muscularsystem/menu/menu.html
But yea, flexion at the glenohumeral joint is just moving your arm forward.
But yea, flexion at the glenohumeral joint is just moving your arm forward.
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ally1 said:
"Flexion" and "extension" at ball-and-socket joints (shoulder and hip) are terms that don't seem to make "common sense" (as at hinge joints). They are arbitrary anatomical definitions. Flexion of the shoulder joint involves forward elevation of the arm; extension is backward elevation. The muscles involved are the deltoid, pectoralis major (clavicular fibers), coricobrachialis, and biceps brachii.
Please note that there is no muscle called the "bicep." It is the "biceps." Unfortunately I have heard physicians say such things as "The patient's left bicep is atrophied compared to his right bicep." The plural form, if you ever have to use it, would be "biceps," bicepses," or something like "bicipites" if you wanted to be etymologically correct.
relax man its not that seriousneurodoc said:
I'm not understanding adduction/abduction and flexion/extension of the thumb... are these movements done in different planes or something? and wouldn't opposing the thumb be similar to one of those as well? is there a good diagram / video?
yeah, i don't get it either... (just wanted you to feel better 🙂)
I THINK, though, that you can break it down into planes, like flexion/extension would occur in a sagittal plane, add/abduction in a frontal plane, and opposition in a transverse plane. Of course, I could be totally wrong. LIke I said, I don't quite get it.
I THINK, though, that you can break it down into planes, like flexion/extension would occur in a sagittal plane, add/abduction in a frontal plane, and opposition in a transverse plane. Of course, I could be totally wrong. LIke I said, I don't quite get it.
MattD said:
Someone said that it was the opposite of what you said, but yep, damn thumb...
Hah, could very well be. I'm feel good about ab/adduction though, it just makes sense that movement in the frontal plane would move away/toward the midline, all i'm doing though is moving it around and trying to guess which is which (and hope my wife doesn't look at me and think I'm going insane/pretending to play playstation with no controller.....)
my thoughts exactly.
Sure dude. I'll let you explain to your patient (that came in complaining of weakness in the bicep(s)) that his/her "bicipites" are both atrophied. I'm sure the patient would appreciate your grammatical discipline, and instantly identify with you.
I'm sure that my patient would appreciate the fact that I'm not a linguistic *****. In fact I have corrected my patients and some of my fellow physicians on their use of the non-word, "bicep," and they have thanked me for doing so. If you were one of those who used this non-word in the past, I would presume that you would want to correct your mistake. If not, I have nothing more to say to you.😀
Sincerely,
Nick
