what muscles do trunk lateral flexion
On the back of the body, the trunk muscles are built in layers, and as a group they help stabilise the trunk and protect to the spinal cord.They hold the body upright while extending and rotating the neck and trunk.The many muscles throughout the back are named because of the actions they performâ¦ like the Erector Spinae for spinal extension and rotators for spinal rotation.hey hold the body upright while extending and rotating the neck and trunk. The many muscles throughout the back are named because of the actions they performâ¦ like the Erector Spinae for spinal extension and rotators for spinal rotation.