if you haven't seen the previous episode you might get confused. so this is a really
cool view actually we're looking from the bottom and we can see a very clear
separation between the sternal and abdominal sections, which explains the
double curve you'll see in the arm. so I started with the clavicular
origin wrapping it around and you can see here how it goes over the volume of the
sternal section that sickness wraps over it and then twists around to connect to
the humerus. you can see how that left side that I drew is kind of facing
upwards
It's kind of a top plane as it goes towards the humorous it twist a little bit and now it's
facing us. so really cool sheet. kinda like a little strap in there and now I'm working on
the sternal section that's a very clear one on him at this moment as he's flexing
and the abdominal section right there and you can see in this area how's the
muscle bundles will kind of group together in various ways like in this one we're
seeing these two group on the left they're kinda like two thicker ones. Then you've got a
tiny one in the middle and then you got another tail coming out on the outside
that reaches down a little bit farther towards the abs. so very interesting organization
of muscle fibers and you can see on the stern section I'm just kind of wrapping
the fibers over that volume really showing that up tilt. I'm gonna draw the
deltoid here just because I want to show you how much of the pec I was actually seeing
and how much I invented so this whole volume right in here is the the deltoid and it's
covering up this whole section so all of this but I'm erasing, making a dotted line
that's all pec underneath the deltoid and look at how the deltoid actually
wraps over the volume of the pec. you can see the bottom edge of the deltoid is a
C curve because its wrapping over the volume of the pec.
that right there was the acromial section of the deltoid.
ok, other side not as much information but also the armpit is a little confusing so
let's start with what we know. I've got the border of the sternum I got the top border of
the clavicle and then you have the clavicular portion kind of wrapping over the
sternal portion and behind it you can't really see much. then right there is a
little bump on the left side of the sternal portion and as it wraps around
and behind itself back into the arm. very complicated angle so you
can see the cross contour lines I added to the fibers. see how it's
wrapping around the roundness of the abdominal section and back into the arm
so that little overlap in the bottom left corner really helps to show that
and again the abdominal muscle bundles kinda have that same pattern where you
got the ones on the inside, you've got two big ones and then one in the middle of its kind
of going up a little higher
and then one on the left or on the outside that reaches down more. and there's the
aponeurosis wrapping around the abs and pretty much gonna be it for this one. very very
very good pose to study because this isn't an angle you usually see, so being able
to see this angle and see how these muscle fibers, how all three
sections interact together, how one wraps over the volume of the other goes underneath
another. just that play between these volumes really good to see in this photo.
I hope you guys enjoyed this lesson. if you wanna see more drawing examples go to
proko.com/anatomy. I have eight more example which serve as the
answers to the assignment from the last lesson that's proko.com/anatomy.
that's it! thanks for watching
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