The erector spinae
erector spinae
Erector Spinae
Erector Spinae
Erector Spinae
Erector spinae
The erector spinae
Erector spinae
Iliocostalis Thoracis
True.
Erector spinae muscles
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!