NUCCA: The National Upper Cervical Chiropractic Association Presented by the Palmer NUCCA Club.
PALMER NUCCA CLUB NUCCA Biomechanics By: Taka & Pat.
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Transcript of PALMER NUCCA CLUB NUCCA Biomechanics By: Taka & Pat.
The Purpose of the Adjustment
• The purpose of a Nucca adjustment is to restore the spine to its normal biomechanical balance and to bring all structures back to vertical axis.
• It is the understanding on how to direct a calculated force from the atlas down through resistance and allow the spine to correct to zero.
• To measure the subluxation and measure the effects of the adjustment.
Four Components Of Biomechanics
1. Measure where it is2. Visualize the path that the BODY has
broken down in3. Deliver a force to a specific point of
application to overcome resistance4. Know what to do if it doesn’t correct
Key Words
• Vector• Resistance• Force• Reduction Pathway• Point of Application• Closed Kinetic Chain• Correction
More Breakdown of Terminology
• Vertical Axis- Gravity with relation to the body
• APL- Atlas Plane Line• Angular Rotation- the
direction in the frontal plane of the cervical spine
• Central Skull Line-The bisecting line through the patient’s skull that is the midpoint of the skull
CSL
APL
Angular Rotation
What do we learn from this model?
• We learn two things: the precise vector or line of drive and the point of application.
• The precision of the calculated vector is what cause the resistances to breakdown with little application of force.
• The correct point of application will create a correct position.
To summarize…
• If an adjusting force fails to overcome the resistances in a C1 sublux., it fails to be corrective.
• The adjusting force must be directed exactly along a resultant that counteracts the resistances, doing this correctly greatly reduces the depth and force that is needed.
• If the adjusting force is greater than the resistances than a greater misalignment can result, if to small then the misalignments are not sufficiently corrected.
How is this accomplished… A unique Model
• The skull and lower cervical spine function as if on the rim of a circle.
• This is important to understand what we are trying to accomplish when we make the adjustment.
• We call this C/A – the point at which the skull and lower angle move at the different speeds, but the same distance.
Putting it all together
• From a breakdown of the whole body• We calculate a vector • Than by applying a force at one point • At a specific point of application • Through a closed kinetic chain• Down the reduction pathway• To overcome resistance• And correct the misaligned spine
Patterns of mis-alignment
• Through clinical experience Dr. Gregory found that people misalign in certain patterns. We call these the Basic Types.
• There are Basic types and out of pattern types which are similar in there basic components but have structures moving in opposing and out of sequence patterns.
But before we learn that….Headpiece placement
• The position of the headpiece is critical in order to gain an optimal correction.
• Remember the Point of application?
• The headpiece helps facilitate the adjustment because it is fixed and stabilized during the adjustment, so that the adjustor’s corrective force can be controlled.
Headpiece Overview
• We position the head according to the type of misalignment.
• The more the skull is vertical the more support it needs during the adjustment so that it does not move.
• A skull that is leaning away from the VA or towards the VA will be positioned differently in order to get the correction.
Pelvis
Basic Type 1
Characteristics of BT1
1. C1 laterality on the same side of angular rotation
2. The skull is parallel or toward vertical axis
3. C1 above parallel
Vertical axis
Resistance
To Correct this Misalignment
1. The vector will be above the c/a
2. Headpiece placement will be above the CG to overcome resistance on the right C1/C2 surface and close the left C0/C1 surface
3. Point of Application is R to L
CG
Vector
Right short leg
R3
L5
52%
Other Factors:
• In the basic type 1 as with other types:
• We need to visualize the skull and spine down to the pelvis as a three dimensional structure that responds and misaligns three dimensionally.
• The short leg and weight bearing should be on the same side in a basic misalignment.
• This forms a single reduction pathway.
Pelvis
Basic Type II
Characteristics of BTII
1. Ipsilateral acute angles
2. C1 remains fairly horizontal
3. Laterality produced mainly by skull
Vertical axis
Resistance
To Correct this Misalignment
1. The vector will be below the c/a
2. Headpiece placement will be below the CG to allow the vector to overcome resistance on the right C0/C1 and the left C1/C2
3. Point of application L to R
CG
Vector
Left short leg
R3(R5)
R7
25%
Type 2
• For a type 2 you could brace on C or you could brace on D.
• Another thing to look at is the body position.• If there is a lot of rotation you can position
the shoulders on the table differently to help reduce this factor of the misalignment.
Pelvis
Basic Type III
Characteristics of BTIII
1. No angular rotation
2. C1 remains horizontal
3. Laterality produced by skull tipping
Vertical axis
Resistance
To Correct this Misalignment
1. The vector will be below the c/a
2. Headpiece placement will be below the CG to allow the vector to overcome resistance on the right C0/C1
3. Point of application R to L
CG
Vector
0
R4(R4) 7%
Pelvis
Basic Type IV
Characteristics of BTIV
1. C1 laterality on the same side of angular rotation
2. The skull is tilted away from the vertical axis
3. C1 above parallel
Vertical axis
Resistance
To Correct this Misalignment
1. The vector will be above the c/a
2. Headpiece placement will be below the CG to overcome resistance on the left C0/C1 surface
3. Point of Application is R to L
CG
Vector
Right short leg
R5(R2)
L4
14%
Type 4
• In a type 4 we have to see what percentage of the misalignment is head tilt and what percentage is angular rotation.
• If there is more head tilt then we have to place the mastoid support more below the skull’s center of gravity.
• If we have more angular rotation then we have to brace the skull closer to the center of gravity to take out the angular rotation.
Final Outcome…To restore the BODY to anatomical zero and OPTOMIZE
a patients ability to HOLD a correction and Heal at the highest possible rate.
Pelvis
Level & non-rotated pelvis
Body center on vertical axis
Level atlas & base of support
Skull on the vertical axis
Digital scales within 2% of body weight