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NUCCA BiomechanicsNUCCA BiomechanicsBy: Patrick Lin
What is BiomechanicsWhat is BiomechanicsThe study of body movements
and of the forces acting on the musculoskeletal system
The application of mechanical laws and principles to the interpretation and analysis of the subluxation and its correction (NUCCA Text)
What is Force?What is Force?A vector quantity tending to
produce an acceleration of an object in the direction of its application. Capacity to do work or cause physical change.
A Push or a Pull.A vector quantity processing size
and direction (NUCCA Text)
What is Resistance?What is Resistance?Any force that tends to oppose
motion. (NUCCA Text)A force that oppose or slows
down another force.
Orthogonal Based Orthogonal Based ChiropracticChiropractic
Intersecting or lying at right angles
Having perpendicular slopes or tangents at the point of intersection
Definition: Orthogonal Definition: Orthogonal AxisAxis
If two symmetrical planes intersect at right angles, the line in which they cut is called an axis of orthogonal symmetry. The central axis or origin of the coordinate system.
PremisePremiseSince each of the
orientation
planes bisect the body, it
follows that each plane must
pass through the center of
gravity. Hence, the center
of gravity may be defined as
the vertical line at which the
two vertical planes intersect
each other. (NUCCA Text)
Terminology: LateralityTerminology: LateralityA rotational, abnormal movement
of C1 about the condyles of occiput and about the sagital axis of motion. Rotation is angular motion about an axis of motion.
Terminology: Angular Terminology: Angular RotationRotation
The abnormal excursion of the cervical spine and skull as a unit about the vertical axis of the body, thereby producing gravitational stresses resulting in rotations of the vertebrae and traction of the contents of the spinal canal & nerve roots.
TerminologyTerminologyAtlas Plane Line
(APL)
Measure of the horizontal place of C1
TerminologyTerminologyAngular Rotation
(Lower Angle)
The line connected by center of the neural canal of the C2 and lowest visible vertebra (Usually C7 or T1)
TerminologyTerminologyCentral Skull
Line (CSL)The line bisect
the skull into equal halves. This line pass through the center of gravity of the head.
TerminologyTerminology
• C/A• Condylar Circle• Axial Circle
•Atlas acts as a lever.
NUCCA Misalignment NUCCA Misalignment PatternsPatternsDistribution of 4 Basic Types
Type 2
Type 1
Type 4
Type 3
Type1 52%Type2 23%Type3 7%Type4 18%
Type 1 Misalignment Var. Type 1 Misalignment Var. 11
Characteristics C1 laterality on the
same side of angular rotation
Contralateral acute angle
Skull is parallel to vertical axis
C1 is above parallel
Side of Laterality
Type 1 MisalignmentType 1 Misalignment
Parallel
Atlas Laterality
Angular Rotation
Type 1 Correction VectorType 1 Correction Vector
E
R
F• Correction Vector above the C/A vector.
Type 1 Misalignment Var. Type 1 Misalignment Var. 22
Characteristics C1 laterality on
the same side of angular rotation
Contralateral acute angle
Skull is toward vertical axis
C1 is above parallel
Side of Laterality
Type 1 CorrectionType 1 Correction
E
R
F
• Same as Var. 1 but with some head tilt. The head is placed differently on the head piece.
Type 2 Misalignment Type 2 Misalignment Characteristics
C1 laterality on the opposite side of angular rotation
Ipsilateral acute angle
Skull is tipped toward vertical axis
C1 remains fairly horizontal
Laterality produced mainly by skull
Side of Laterality
Mainly by
Skull
Type 2 MisalignmentType 2 Misalignment
• Angular rotation into the left frontal plane.• Skull turns into the right frontal plane.
Type 2 Correction VectorType 2 Correction Vector
E
R
F
• Correction vector below the C/A vector
Type 3 MisalignmentType 3 MisalignmentCharacteristics
C1 laterality on the same side of head tilt
No angular rotation C1 remains fairly
horizontal Laterality produced
by head tilt
Side of Laterality
Directly by
Skull
Type 3 MisalignmentType 3 Misalignment
• No angular rotation & laterality caused by skull.
Type 3 Correction VectorType 3 Correction Vector
E
R
F
• The correction vector should be well below the C/A vector.• Head piece placement is very important!
Type 4 MisalignmentType 4 MisalignmentCharacteristics
C1 laterality on the same side of angular rotation
Contralateral acute angle
Skull is tilted away from vertical axis
C1 is above parallel
Side of Laterality
Type 4 MisalignmentType 4 Misalignment
• Laterality is caused by 70% angular rotation, 30% skull tipping
Type 4 Correction VectorType 4 Correction Vector
E
R
R• Correction vector above C/A
SummarySummary
Acute Angle
Cause
Type 1 Contralateral C1 Sideslip
Type 2 Ipsilateral Head tilt
Type 3 - Head tilt
Type 4 ContralateralC1 sideslip / Head tilt
ExercisesExercises
Type 1
ExercisesExercises
Type 2
ExercisesExercises
Type 4
ExercisesExercises
Type 2
ExercisesExercises
Type 1
ExercisesExercises
Type 3
ExercisesExercises
Type 1
ExercisesExercises
Type 4
ExercisesExercises
Type 2
Dr. Brooks ExampleDr. Brooks Examplehttp://www.chirocorrection.com/b
rooksspinalcare