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.
horizontal/trasverse
External obliques are primarily considered to be in the frontal plane of motion. They are responsible for lateral flexion and rotation of the trunk.
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.
Trunk flexion occurs in the sagittal plane of body motion. This movement involves bending the torso forward, bringing the chest toward the thighs. It primarily involves the muscles of the back and abdomen.
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.
The trunk lift exercise helps to strengthen your back and abdominal muscles. This exercise is also good for your hips and makes it stronger.
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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
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.
The internal oblique muscles help with trunk rotation and bending, while the external oblique muscles assist with trunk flexion and rotation.
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.