True.
Bilateral contraction of the erector spinae muscles which are the iiliocostalis, longissimus and spinalis leads to extension/hyper extension of the back.
Lateral bending of the spine.
Iliocostalis Thoracis
Erector Spinae are extensor muscles encompasing the neck and trunk. Extensor movement is antagonistic to flexor movement. Therefore, find a muscle of the neck and a muscle of the trunk that act as flexors. That should answer your question without giving away all of the milk and honey!
erector spinae for spinal extension and quadratus lumborum for spinal abduction
a muscle
Bilateral contraction of the erector spinae muscles which are the iiliocostalis, longissimus and spinalis leads to extension/hyper extension of the back.
The erector spinae
erector spinae
Erector Spinae
Erector Spinae
Lateral bending of the spine.
Erector Spinae
Erector spinae
The erector spinae
Erector spinae
Iliocostalis Thoracis