NUCCA Biomechanics: Type 4 By: Takanobu Nakaseko and Pat Lin Edited By: Lauren Lankenau
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
Type 4 Misalignment
How to Correct Misalignment? Combination of the Head piece placement and Triceps pull Patient placement is extremely crucial!
Head Piece A B C D
Mastoid Process 1 4 3 2
Mechanism of Head Piece 4 on C COG Allows the head to fall away to help corect the head tilt of the misalignment
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.
Type 4 Correction E R R
Type 4 Correction COG C