what was driving me insane
Sep. 16th, 2004 08:03 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
ninevirtuesFryette's Laws:
1. When you stand in neutral posture and sidebend to the right, the vertebrae in your thoracic spine also rotate right.
2. When you stand in thoracic flexion or extension, and sidebend to the right, the vertebrae in your thoracic spine rotate left.
3. When you move the spine in ONE way, there is less mobility remaining to move it in OTHER ways. For example, if you are flexed forward, you have less ability to sidebend.
(The classnotes were violently unclear on that concept.)
Also: When you rotate, rotation happens mainly in the thoracic spine, (NOT in the lumbar spine; try it and you'll see what I mean) and the superior (on top) thoracic vertebrae rotates on the inferior (on bottom) vertebrae. Ribs are attached at the costal facets (flat spots on the vertebrae), and each rib is attached to a facet at the bottom of one vertebrae and a facet at the top of another one.
Accordingly, when rotation occurs in the spine, the superior vertebrae rotates, taking the top of the rib with it. This causes the rib to.... and here's what drove me to song yesterday.... rotate forward in a plane parallel to the ground, but also to move ever so slightly Up and Over.
Also, as a consequence of rotation.... say you rotate to the right. The left front of your ribcage gets flatter. The right front gets rounder. The right back gets flatter. The left back gets rounder. Aaaagh!
Don't even ask me what the classnotes said about THAT one. It was not pretty. But now that all is known, or mostly known.... I'm ready to settle down, learn the rest of it, and stop trying to kill things. Whew!
And last, I leave you with the best line I've heard all day:
"Okay, if you are assessing the thoracic spine, how do you rule out cervical spine involvement?"
"Decapitation."
"Um, yeah. That would do it."
1. When you stand in neutral posture and sidebend to the right, the vertebrae in your thoracic spine also rotate right.
2. When you stand in thoracic flexion or extension, and sidebend to the right, the vertebrae in your thoracic spine rotate left.
3. When you move the spine in ONE way, there is less mobility remaining to move it in OTHER ways. For example, if you are flexed forward, you have less ability to sidebend.
(The classnotes were violently unclear on that concept.)
Also: When you rotate, rotation happens mainly in the thoracic spine, (NOT in the lumbar spine; try it and you'll see what I mean) and the superior (on top) thoracic vertebrae rotates on the inferior (on bottom) vertebrae. Ribs are attached at the costal facets (flat spots on the vertebrae), and each rib is attached to a facet at the bottom of one vertebrae and a facet at the top of another one.
Accordingly, when rotation occurs in the spine, the superior vertebrae rotates, taking the top of the rib with it. This causes the rib to.... and here's what drove me to song yesterday.... rotate forward in a plane parallel to the ground, but also to move ever so slightly Up and Over.
Also, as a consequence of rotation.... say you rotate to the right. The left front of your ribcage gets flatter. The right front gets rounder. The right back gets flatter. The left back gets rounder. Aaaagh!
Don't even ask me what the classnotes said about THAT one. It was not pretty. But now that all is known, or mostly known.... I'm ready to settle down, learn the rest of it, and stop trying to kill things. Whew!
And last, I leave you with the best line I've heard all day:
"Okay, if you are assessing the thoracic spine, how do you rule out cervical spine involvement?"
"Decapitation."
"Um, yeah. That would do it."
