*
This is your Finals test for Course 122 - to be
taken after you have registered
and processed tuition.
Name:
Email:
True
| False
1.
A
weakness in the adult S-shaped posture’s ability
to sustain stability against the force of gravity
is it needs to use complex mechanisms of shear
stabilization
2.
1st
and 3rd class levers can both create shear forces
at the joint.
3.
In
human movement the force of resistance and force
of effort (muscle)
combine to create the resultant force or true
resistance arm.
4.
The
S-shaped posture gives the human spine the unique
ability to utilize 1st class levers when functioning
against a resistance from the anterior in either
the supine or upright position.
5.
The
basis of determining if a lever system in human
movement is either 1st or 3rd class is determined
by analyzing how the resultant force (TRA) is
functioning against the stabilizing force (TEA)
at their fulcrum point.
6.
Shear
forces characterize stability and compressive
forces characterize instability in lever systems.
7.
If
a human movement requires 3rd class lever systems,
you would typically
examine human anatomy for the mechanisms of
shear stabilization.
8.
Typically
lever systems in the human body are best identified
by looking for
anatomical attachment of the muscle of effort
relative to the fulcrum point
and the resistance and not by mathematical discovery.
9.
Human
locomotion suffers when the proper spinal posture
is lost due to the fact the body typically becomes
a postural maintenance machine rather than one
designed for movement.
10.
A
better way to determine joint strength would
be to look at the joint tissue’s ability to
handle compression and shear forces rather than
just looking at the initial force of effort.
11.
In
a runner that is slow and has tight hamstrings,
it would be logical to suspect that their shortened
stride length was due to the fact that their
legs are being used by the body to stabilize
upright posture rather than being devoted to
locomotion.
12.
In
an athlete that was stiff and weak when it comes
to contact sports like football, we would logically
suspect that they have poor spinal posture that
was requiring the use of 3rd class lever systems.
13.
Since
it appears that all humans are supposed to develop
the upright S-shaped posture that gives humans
unique physical abilities naturally, it is something
training and treatment programs should not have
to be concerned with.
14.
If
an athlete in a sport that requires jumping
chronically demonstrates poor technique like
jumping into the net, it would be logical to
check the athlete for poor spinal posture.
15.
If
an athlete demonstrates knee problems like anterior
cruciate ligament strain, it would be logical
to advise the athlete to avoid training exercises
that create shear forces that the injured ligament
must stabilize.
16.
It
is logical that any competent training program,
especially in youth sports when the spinal posture
is developing, needs to implement ways for the
enhancement, restoration and preservation of
the proper upright adult S-shape posture.
Last
Modified :
01/04/11
All concepts and diagrams, unless noted otherwise,
of human spinal development in gravitational
environment are under copyright registration
to John S. Scherger, D.C.. This information
may be shared with others for personal use,
however no document may be republished in any
form or embedded
in public databases without the permission of
Dr. Scherger.
True
| False