bet about pec heads with my friend

[Skate67]

I told my friend that the "pec" is just one muscle. I'm not talking about the clavical head just the main sternal head (ie the main part of your pec). He got all worked up and told me that it's split down the center horizontally and that there are two different muscles. He said "Ok you know how theres three heads to your shoulders? Thats how the pec is too. There's an upper and a lower part". To remove all doubt, I even mentioned the clavical head and he goes, "NO that's not what I'm talking about".So now we have a friendly bet about it.

http://www.exrx.net/Muscles/PectoralisSternal.html

From that diagram it would appear that right on this one. Who wins the bet?

 

[assassin]

u win if u click on the sternal head u'll find it's another muscle... i don't know really but i guess nobody will win cause he'll tell you look that's it there's more than one head and u'll tell him look at red shaded area just one..

 

[VanessaNicole]

Actually, you lose.

There is the pectoralis major, which is the large triangular muscle extending from the sternum to the humerus. Then there is the pectoralis minor, which is beneath the pectoralis major and attached to the coracoid process of the scapula.

Sorry. Hope you didn't bet anything good.

VanessaNicole

 

[assassin]

Actually, you lose.

There is the pectoralis major, which is the large triangular muscle extending from the sternum to the humerus. Then there is the pectoralis minor, which is beneath the pectoralis major and attached to the coracoid process of the scapula.

Sorry. Hope you didn't bet anything good.

VanessaNicole

good info

 

[Skate67]

Actually, you lose.

There is the pectoralis major, which is the large triangular muscle extending from the sternum to the humerus. Then there is the pectoralis minor, which is beneath the pectoralis major and attached to the coracoid process of the scapula.

Sorry. Hope you didn't bet anything good.

VanessaNicole

I mentioned above that he was talking about that the pectoralis major was two different muscles...

Edit: I think you should re read what i posted... I was arguing that the sternal part of the pectoralis major was one muscle, he said two.

 

[GFR]

I mentioned above that he was talking about that the pectoralis major was two different muscles...

Edit: I think you should re read what i posted... I was arguing that the sternal part of the pectoralis major was one muscle, he said two.

I think she posted without reading.....that is very common here.

 

[CowPimp]

Yes, the sternal head is only one muscle.

 

[DOMS]

Pervert.

 

[VanessaNicole]

I mentioned above that he was talking about that the pectoralis major was two different muscles...

Edit: I think you should re read what i posted... I was arguing that the sternal part of the pectoralis major was one muscle, he said two.

No you didn't.

And both the pectoralis major and the pectoralis minor are attached to the sternum. And they are divided horizontally.

I read what you wrote very carefully. No reference to the "pectoralis major" was made.

You made a reference to the "main sternal head", but both muscles originate in the sternum. And the pectoralis minor is in no way attached to the clavical.

I think you just can't stand to lose a bet.

VanessaNicole

 

[KarlW]

She's right.

 

[MyK]

there both right!

his friend thinks that the major is divided horizontally, and is wrong. st240 said that the pec major is one muscle and is right. vanessa pointed out that thir is also a pec minor behind the major and is right!

The Pectoralis major (Fig. 410) is a thick, fan-shaped muscle, situated at the upper and forepart of the chest. It arises from the anterior surface of the sternal half of the clavicle; from half the breadth of the anterior surface of the sternum, as low down as the attachment of the cartilage of the sixth or seventh rib; from the cartilages of all the true ribs, with the exception, frequently, of the first or seventh, or both, and from the aponeurosis of the Obliquus externus abdominis.

The Pectoralis minor (Fig. 411) is a thin, triangular muscle, situated at the upper part of the thorax, beneath the Pectoralis major. It arises from the upper margins and outer surfaces of the third, fourth, and fifth ribs, near their cartilage and from the aponeuroses covering the Intercostalis; the fibers pass upward and lateralward and converge to form a flat tendon, which is inserted into the medial border and upper surface of the coracoid process of the scapula.

http://education.yahoo.com/reference/gray/subjects/subject?id=122

 

[KarlW]

She's right.

I meant about the fact that he did not mention he was talking about Pec Major.

 

[CowPimp]

No you didn't.

And both the pectoralis major and the pectoralis minor are attached to the sternum. And they are divided horizontally.

I read what you wrote very carefully. No reference to the "pectoralis major" was made.

You made a reference to the "main sternal head", but both muscles originate in the sternum. And the pectoralis minor is in no way attached to the clavical.

I think you just can't stand to lose a bet.

VanessaNicole

I thought the origin of the pectoralis minor was on the ribs, but not the sternum? The sternal head of the pectoralis major originiates on the sternum as well as certain ribs, though I forget which ribs exactly.

 

[CowPimp]

You better whip out some semantics to win this bet I think, though I have a feeling your friend had no idea what the pectoralis minor is; most people don't.

 

[GFR]

No you didn't.

He made it very clear, go read it again.

ForemanRules

 

[VanessaNicole]

He made it very clear, go read it again.

ForemanRules

Show me where it says "pectoralis major" in his original post, and I'll go take remedial 5th grade reading.

VanessaNicole

 

[VanessaNicole]

I thought the origin of the pectoralis minor was on the ribs, but not the sternum? The sternal head of the pectoralis major originiates on the sternum as well as certain ribs, though I forget which ribs exactly.

Both the pectoralis major and the pectoralis minor are attached to sternum as well as the ribs.

They actually overlap somewhat. But the distinction between the major and minor occurs between the 3rd and 4th intercostal space.

VanessaNicole

 

[Skate67]

Show me where it says "pectoralis major" in his original post, and I'll go take remedial 5th grade reading.

VanessaNicole

Clavical/Sternal heads = Pectoralis major heads

 

[VanessaNicole]

Clavical/Sternal heads = Pectoralis major heads

There is no "clavicular head" of the pectoralis major, it's lateral most point of insertion is the humerus. And it's medial point of insertion is the sternum, not the clavical.

And the pectoralis minor also has a medial point of insertion at the sternum (what you call a sternal head). There is a sternal head of the p. major and a sternal head of the p. minor.

Anyway, I'm not into symantics.

VanessaNicole

 

[MyK]

There is no "clavicular head" of the pectoralis major, it's lateral most point of insertion is the humerus. And it's medial point of insertion is the sternum, not the clavical.

And the pectoralis minor also has a medial point of insertion at the sternum (what you call a sternal head). There is a sternal head of the p. major and a sternal head of the p. minor.

Anyway, I'm not into symantics.

VanessaNicole

 

[DOMS]

There is no "clavicular head" of the pectoralis major, it's lateral most point of insertion is the humerus. And it's medial point of insertion is the sternum, not the clavical.

And the pectoralis minor also has a medial point of insertion at the sternum (what you call a sternal head). There is a sternal head of the p. major and a sternal head of the p. minor.

Anyway, I'm not into symantics.

VanessaNicole

Pectoralis Major (Sternal Head)

Pectoralis Major (Clavicular Head)

My dear, you have stumbled into a nest of bodybuilding lawyers. Precision is key.

 

[Skate67]

There is no "clavicular head" of the pectoralis major, it's lateral most point of insertion is the humerus. And it's medial point of insertion is the sternum, not the clavical.

And the pectoralis minor also has a medial point of insertion at the sternum (what you call a sternal head). There is a sternal head of the p. major and a sternal head of the p. minor.

Anyway, I'm not into symantics.

VanessaNicole

You knew what I meant.

 

[CowPimp]

Both the pectoralis major and the pectoralis minor are attached to sternum as well as the ribs.

They actually overlap somewhat. But the distinction between the major and minor occurs between the 3rd and 4th intercostal space.

VanessaNicole

The pectoralis minor sits underneath the pectoralis major. Also, there is definitely a sternal and clavicular head to the pectoralis major. The clavicular head actually orginiates on the clavicle, hence the name.

 

[CowPimp]

There is no "clavicular head" of the pectoralis major, it's lateral most point of insertion is the humerus. And it's medial point of insertion is the sternum, not the clavical.

And the pectoralis minor also has a medial point of insertion at the sternum (what you call a sternal head). There is a sternal head of the p. major and a sternal head of the p. minor.

Anyway, I'm not into symantics.

VanessaNicole

The pectoralis minor does not orginiate at the sternum, and there are not separate heads to the pectoralis minor.

 

[GFR]

Show me where it says "pectoralis major" in his original post, and I'll go take remedial 5th grade reading.

VanessaNicole

Looks like nobody can show you anything and you are incapable of reading with some common sense.

 

[GFR]

No you didn't.

And both the pectoralis major and the pectoralis minor are attached to the sternum. And they are divided horizontally.

I read what you wrote very carefully. No reference to the "pectoralis major" was made.

You made a reference to the "main sternal head", but both muscles originate in the sternum. And the pectoralis minor is in no way attached to the clavical.

I think you just can't stand to lose a bet.

VanessaNicole

Pectoralis minor:

Origin 3rd to 5th ribs near their costal cartilages.

Insertion: Medial border and superior surface of coracoid process of scapula

Pectoralis major:

[FONT=arial,helvetica,geneva]ORIGIN
[SIZE=-1]Clavicular head-medial half clavicle. Sternocostal head-lateral manubrium and sternum, six upper costal cartilages and external oblique aponeurosis
[/SIZE][/FONT][FONT=arial,helvetica,geneva]INSERTION
[SIZE=-1]Lateral lip of bicipital groove of humerus and anterior lip of deltoid tuberosity


To say they are both attached to the sternium is a bit of a stretch...in fact both are not .[/SIZE][/FONT]