Where are the electrodes placed for lumbar paraspinal NMES?

Where are the electrodes placed for lumbar paraspinal NMES?

• A. Two electrodes on both sides of spine
• B. Two electrodes from same channel on one side of the spine running vertically
• C. One electrode on spine and one on abdomen
• D. Two electrodes on the same side but horizontally

Answer: (B)

The main idea is to target the lumbar paraspinal muscles with a single stimulation channel that travels along the side of the spine. Placing both electrodes on the same side of the spine and running them vertically aligns the current with the paraspinal muscle fibers, producing a more localized and effective contraction of those muscles. This vertical, single-side setup minimizes current spread to the opposite side or to the abdominal wall, which helps avoid activating unintended muscles and improves patient comfort. Other placements are less focused: putting electrodes on opposite sides would recruit both sides and reduce unilateral targeting; placing one electrode on the spine and one on the abdomen directs current through the abdominal tissues rather than along the paraspinals; placing the electrodes on the same side but horizontally could misalign the current with the muscle fibers and lessen depth of stimulation.

The main idea is to target the lumbar paraspinal muscles with a single stimulation channel that travels along the side of the spine. Placing both electrodes on the same side of the spine and running them vertically aligns the current with the paraspinal muscle fibers, producing a more localized and effective contraction of those muscles. This vertical, single-side setup minimizes current spread to the opposite side or to the abdominal wall, which helps avoid activating unintended muscles and improves patient comfort.

Other placements are less focused: putting electrodes on opposite sides would recruit both sides and reduce unilateral targeting; placing one electrode on the spine and one on the abdomen directs current through the abdominal tissues rather than along the paraspinals; placing the electrodes on the same side but horizontally could misalign the current with the muscle fibers and lessen depth of stimulation.