The Sagittal plane passes through the body front to back, so dividing it into left and right. Movements in this plane are the up and down movements of flexion and extension.
The movement of the trunk in the frontal plane is called lateral flexion. This involves bending the trunk sideways to the left or right at the waist. It occurs in the frontal plane, which divides the body into front and back halves.
Movements in the transverse plane occur around the vertical, or longitudinal, axis of the body. This axis runs from top to bottom, perpendicular to the ground. Examples of transverse plane movements include rotation of the head, trunk, and limbs.
I would say that the rectus abdominis would be the main muscle associated with trunk flexion, but the external and internal obliques also perform trunk flexion.
Bending the trunk forward at the intervertebral discs is an example of flexion, which is a movement that decreases the angle between body parts at a joint.
In your trunk twist the lumber vertebrae mostly take part. In this the facet joints are used. The orthopedic surgeons use the term, facet joint. The anatomists call it as zygapophyseal joints.
Lateral flexion of the trunk involves moving the shoulders left or right towards the hips, therefore it is exercised in the frontal or coronal plane of motion.
External obliques are primarily considered to be in the frontal plane of motion. They are responsible for lateral flexion and rotation of the trunk.
The movement of the trunk in the frontal plane is called lateral flexion. This involves bending the trunk sideways to the left or right at the waist. It occurs in the frontal plane, which divides the body into front and back halves.
list movements for trunk flexion
Sagital Plane Exercises are a forward to backward movement or front to back movement. Inverse Crunch Floor to waist Front Squats Knee Flexion and extension Trunk Flexion and Extension Shoulder flexion and extenstion
transverse plane
Trunk rotation occurs in the transverse plane of motion, where the body rotates around its vertical axis. This movement allows the trunk to twist to the left or right.
Trunk flexion & unilateral trunk flexion.
horizontal/trasverse
trunk flexion lateral trunk flexion
Movements in the transverse plane occur around the vertical, or longitudinal, axis of the body. This axis runs from top to bottom, perpendicular to the ground. Examples of transverse plane movements include rotation of the head, trunk, and limbs.
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