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Biology 16 Online
OpenStudy (leahhhmorgannn):

http://prntscr.com/9aafha The thrower's arm is moving in which anatomical directions in the picture above? Proximal and inferior Proximal and superior Anterior and inferior Anterior and superior I'm not totally sure on this one because in my PERSONAL thought, it'd be more like posterior and superior...

OpenStudy (anonymous):

hello?

OpenStudy (leahhhmorgannn):

hey

OpenStudy (anonymous):

need help?

OpenStudy (leahhhmorgannn):

yeah, the options confuse me because none of them make much sense to me.

OpenStudy (leahhhmorgannn):

I mean, I know what it would be to me, but the options don't follow that.

OpenStudy (anonymous):

okay

OpenStudy (anonymous):

what do you think the answer is?

OpenStudy (leahhhmorgannn):

well, to me, it'd be posterior and superior but that's not an option so I don't know

OpenStudy (leahhhmorgannn):

I doubt it's anything with proximal because that means closer to the center line.

OpenStudy (anonymous):

okay

OpenStudy (leahhhmorgannn):

and based on my thoughts of superior, I put D but anterior doesn't make much sense to me

OpenStudy (anonymous):

http://www.physio-pedia.com/Thrower's_Shoulder

OpenStudy (anonymous):

this might help

OpenStudy (leahhhmorgannn):

which section of it...

OpenStudy (anonymous):

Arm wingspaning Phase

OpenStudy (anonymous):

The arm wingspaning phase can be defined as the beginning of lead foot contact and ends at maximum shoulder external rotation.[3] A substantial amount of kinetic energy is transmitted to the shoulder, approximately 80% bodyweight, from the lower extremities and trunk rotation. Due to the circumstances the scapula and shoulder muscles are highly activated to promote and sustain movements of the shoulder, especially external rotation. Special focus to anterior instability in this phase is vital due to the high ranges of external rotation reached in this phase.[1][5] In a study of pitchers with chronic anterior instability, stimulation of mechanoreceptors within the glenohumeral joint excited and/or inhibited certain muscles. The biceps brachii and supraspinatus are shown to be initiated or excited by these mechanoreceptors and assist with prevention of anterior instability. Overtime the excessive utilization of the biceps brachii could lead to a superior labrum anterior to posterior (SLAP) tear. Simultaneously the pectoralis major, subscapularis, and serratus anterior are inhibited. These muscles decelerate shoulder external rotation in this phase. When these actions cannot be preformed there is increase likelihood of anterior instability of the glenohumeral joint.[3]

OpenStudy (anonymous):

that part.

OpenStudy (anonymous):

not a or b

OpenStudy (leahhhmorgannn):

yeah, I figured that much out.

OpenStudy (leahhhmorgannn):

would it be D or?

OpenStudy (anonymous):

I think D. Because Cranial and caudal have the same meaning as superior and inferior, respectively, but are used in reference to animal, rather than human, anatomy. Anterior refers to the side of the body facing up in the standard anatomical position. Posterior refers to the bottom side.

OpenStudy (leahhhmorgannn):

This was wrong.

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