Inventing the Shoulder Muscles

Inventing the Shoulder Muscles


Let’s see how we can draw the shoulder muscles
from imagination! I’m starting with poses of Skelly to get an accurate framework. You
can use the Skelly App to create your own poses or if you have the premium anatomy course,
I’ve provided you with 5 images. Now, let’s invent the muscles! Here we have almost a straight on back view.
The right arm is lifted and the left arm is being pulled back. We need to keep that in
mind as we draw the muscles stretched or compressed. Here’s the basic shape of the scapula. We
don’t have to get too detailed with it because it’s mostly covered anyway. But we do need
to get the landmarks in the right place. A basic shape of the scapula is more than enough
to figure out the muscles. A curve for the medial ridge, and another for the spine of
the scapula leading to the acromion. Simple indication for the pelvis. I’ll use
cylinders for the arms instead of bones. I want to indicate the thickness of the arm
because if does affect the muscles of the shoulders, but I don’t want to get distracted
with the muscles of the arm right now. So, a cylinder helps us visualize the volume of
the arm, without all the details. I got my skeleton laid in, now let’s add
some muscles. This right arm is lifting up to the side, so the teres major will be stretching.
The left arm is pulling back, causing the teres major to contract. I’ll make this
shape a bit fatter and shorter than the right side. Infraspinatus will cover the rest of the scapula
under its spine. Getting those in there, tracking up to the head of the humerus. Remember, the
teres major attaches a few inches lower on the humerus, while the infraspinatus and teres
minor attach to the head of the humerus. If we were to see the volume of the supraspinatus,
it would be here. Which is actually possible on the right side since the arm is lifting.
But usually it’ll be covered up by the trapezius. Remember the double curve of the lats and
teres major? The lats will swing down from under the teres major down to the pelvis. From this angle, we might see a slither of
the serratus on this side. Get the obliques in there. Shoulders don’t look complete without the
deltoids… Oh, and I forgot to mention, the lats will
cover this inside corner of the teres major as they curve up toward their origin at the
spine. Don’t worry, we’ll learn about the lats in the next lesson. To see 4 more narrated demonstrations, check
out the premium anatomy course. I’ll guide you through drawing the shoulder muscles in
various positions and from any angle. Get seriously schooled on anatomy at proko.com/anatomy. If you like this video, don’t be all selfish. Share with your friends. And if you want to be updated on new videos, click this button or go to Proko.com/subscribe

Leave a Reply

Your email address will not be published. Required fields are marked *