1. NUCCA Biomechanics: Type 4
By: Takanobu Nakaseko and Pat Lin
Edited By: Lauren Lankenau

2. Type 4 Characteristics C1 laterality on the same side of
angular rotation
Contralateral acute angle
Skull is tilted away from vertical axis
C1 is above parallel

3. Type 4 Misalignment

4. How to Correct Misalignment?
Combination of the Head piece placement and Triceps pull
Patient placement is extremely crucial!

5. Head Piece A B C D

6. Mastoid Process 1 4 3 2

7. Mechanism of Head Piece 4 on C
COG
Allows the head to fall away to help corect the head tilt of the misalignment

8. C/A
Type 4
The vector is close to but above C/A because both lower angle and head tilt should be corrected at the same time.

9. Type 4 Correction E R R

10. Type 4 Correction
COG C