The erector spinae is a group of muscles and tendons, including the spinalis muslces, which run vertically up your spine. Together, the erector spinae muscle group and the spinalis muscles aid in backbending, side bending and twisting the spine.
How to Effectively Memorize Scripture Introduction: The best way I know of for memorizing the Word is to use Scripture memory cards.
Torrey's The Treasury of Scripture Knowledge are truly inspired choices. The Treasury of Scripture Knowledge is an EXTENSIVE cross-reference system that GREATLY facilitates the practice of 'allowing' Scripture to interpret Scripture. A book on Bible study methodology by R. A. Torrey is included as well.