3D Dynamic Modeling of the Head-Neck Complex for Fast Eye and Head Orientation Movements Research

Table 1

Geometric characteristics and inertial parameters for bony structures in the complex. Adapted from (Chang et al. [26] and van Lopik and Acar [6]).

Body	Center of mass			Orient (𝛼Z)	Mass	𝐼𝑥𝑥	𝐼𝑦𝑦	𝐼𝑧𝑧	𝐼𝑦𝑧
	𝑋 (mm)	𝑌 (mm)	𝑍 (mm)	(Deg)	(Kg)	Kg-m^2	Kg-m^2	Kg-m^2	Kg-m^2
Head	113.00	198.00	−6.00	0	4.69	0.181	0.173	0.236	0.071
C1	100.00	153.00	−2.00	0	0.22	2.2𝑒−4	4.2𝑒−4	2.2𝑒−4	—
C2	100.0	136.0	−1.0	0	0.25	2.5𝑒−4	4.8𝑒−4	2.5𝑒−4	—
C3	96.00	116.00	−1.00	0	0.24	2.4𝑒−4	4.6𝑒−4	2.4𝑒−4	—
C4	94.00	97.00	−2.00	−5	0.23	2.3𝑒−4	4.4𝑒−4	2.3𝑒−4	—
C5	94.00	80.00	−2.00	−10	0.23	2.3𝑒−4	4.5𝑒−4	2.3𝑒−4	—
C6	89.00	64.00	1.00	−22	0.24	2.4𝑒−4	4.7𝑒−4	2.4𝑒−4	—
C7	83.00	48.00	2.00	−31	0.22	2.2𝑒−3	4.3𝑒−3	2.2𝑒−3	—
T1	72.00	28.00	3.00	−28	Considered fixed during head movements