Trunk and Neck Muscles-Actions - continued
SPINAL FLEXION is NOT the same as hip flexion or anterior pelvic tilt:
(All 3 occur during toe-touching).
Hip flexion = anteriorly directed sagittal plane motion of femur with respect to pelvic girdle (or vice versa)
Anterior pelvic tilt = anteriorly directed movement of the anterior superior iliac spine with respect to the pubis symphysis. It facilitates BOTH hip flexion AND spinal flexion.
Trunk = lumbar + thoracic parts of vertebral column