Technical Tuesday Joints
The joints in your body allow movement
in different ways. Here are three:
Spin is a movement of a bone around its own long
axis; it is denoted by the anatomical term rotation.
Swing is an angular movement, where the angle between bones
change. An example: bending and
straightening the elbow.
Approximation
is the movement caused by pressing or
pulling one bone directly toward another.
There are two basic structural types of
joint: diarthrosis (synovial
joint), where fluid is present, and synarthrosis,
where there is no fluid.
The joint dancers are most concerned
with is the hip joint: it is a ball-and-socket synovial joint formed by the articulation
of the rounded head of the femur and the cup-like acetabulum of the pelvis (see today's video). This joint allows turnout!
From the Big
Blue Book of Ballet Secrets
Anatomical Secret #27yy:
“ Several basic
movements are allowed by joints.”
Link of the Day:
Quote of the Day:
“To
succeed in life, you need three things: a wishbone, a backbone and a funny
bone.”
- Reba
McEntire
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