Feb 28, 2012

Study: Anatomy: The trunk / torso 4

I thought the shoulderblade deserved a seperate study;
to be more precise, the movement of the shoulderblade.

1 - Relaxed
2 - Pulled back
3 - Pulled up
4 - Pulled up + Rotation because of the lifted arms
5 - Relaxed Sideview
6 - Pulled to the front

In an earlier piece, I quoted an illustration from G.B.Bridgeman that displayed the shoulder ring as a scale, that's not right though, I think. If it was like a scale, you wouldnt be able to pull up both your arms at the same time...or maybe I just miss a point. I guess it was to simplyfie the matter.

For this work, I checked several videos on youtube.
I recognized that the shoulderblade does move, but not as much as I thought before. I still dont have a clear vision of how the muscles deform while the shoulderblade moves, but that will hopefully come with more practise.

- I got nothing this time ^^°

Feb 27, 2012

Study: Anatomy: The trunk / torso 3 (Back)

The backside of the torso.
It seems so flat and empty at first, but if you want to understand the muscles it's really difficult.
I didnt draw any of this without reference, some proportions might be off here and there, though.
It's good enough for a starting point.

The first detailed one is to get a feeling of the body's form, while the one on the right is more to shematically show the positioning of the back muscles.
1 - Trapezius Muscle
2 - Latissiums Dorsi (one muscle, not two)
3 - Shoulderblade

The 3 illustrations down there show the muscles of the shoulder, which is really tricky, but in rough it's just one big boulder of muscle, that acts as a landmark on the back.
The shematic sketch and the shoulders can be found in George B. Bridgman's "The human machine", the detailed one has a reference on google somewhere.

I have a better understanding of the shoulder and the back now, but I still dont quite understand how and when the shoulderblade moves. I have to check on this some more.

What's to note ?
- Like mentioned in an earlier piece, the shoulderblade is embedded into the back instead of attached to the ribcage. It's only connection is at the collarbone.
- The most prominent back muscles are the two thick strings left and right of the spine.
- The next is the shoulder / the muscles on the shoulderblade, which stretch or deform while moving the arm and are bordered/covered by the Latissimus Dorsi below and the Trapezius and the Deltoid above.

Feb 23, 2012

Study: Anatomy: The trunk / torso 2

I would have liked it better to edit this piece into the other post about the torso, but that would be too much text in one post, so I have to split it up.

The first part was about the bones of the torso, the ribcage and shoulders, to name them.

This one is about the muscles, as you can see.
In case you wonder, the red area shows rather flat zones, which is intersting when you have to add light and shadow.

So what's there to note ?

- The breast muscles are attached to the breast bone / collarbone on the one and to the upper arm on the other side.
-The abdominal muscles are not multiple muscles, but one big muscle band that is attached to the ribs/breastbone above and at the pelvis on the lower end.
-The saw shaped muscles (serratus anterior) are attached to the ribs and the shoulder blade.

Used George B. Bridgman's "The human machine", as well as google and wikipedia

Feb 21, 2012

Study: Anatomy: The trunk / torso

behold my new piece of study:
The torso / trunk or to be a little more precise:
The shoulders.
Most illustrations you will find in George B. Bridgman's "The Human Machine", but copying these will already improve your own skills. Once again, the book alione wont help much, you need to work deeper yourself and research other spources as well.
I was surprised how difficult it can be to find a good picture of a ribcage. The one above is not totally acurate.
The angle in the middle is too narrow, I think...or too round, maybe both.

If I got it right, the shoulder ring is rather stiff and moves like a balance.

- The arm is attached to the shoulderblade, not the ribcage
- The shoulderblade is imbedded into the back, rather than attached to the ribcage or smth.
- There are 12 ribs, but only the first 6 are attached to the breast bone (sternum), the lower 5 are indirectly connected to it and the lowest rib has no connection at all.
- All ribs have a connection to the spine.