The effects of Harrington rod distraction on the spinal cord can be tested by all of the following except:

The correct option is the technique involving dorsal root stimulation, as it does not provide information on the functional integrity of the spinal cord during Harrington rod distraction.

Harrington rod distraction is a surgical procedure often used in the correction of spinal deformities, and it's crucial to monitor the spinal cord's responses to ensure that it is not compromised during this manipulation.

The Stagnara wake-up test is a valuable intraoperative technique that involves waking the patient in order to assess motor and sensory function, specifically checking for any signs of spinal cord compromise. This test is highly effective in evaluating the spinal cord's responsiveness to ensure that it remains functional during surgical procedures.

Somatosensory evoked potentials (SSEPs) and motor evoked potentials (MEPs) are non-invasive electrophysiological monitoring modalities used to assess the function of sensory and motor pathways, respectively. SSEPs evaluate the sensory pathways from the periphery to the brain and can indicate whether there is pressure or damage to the spinal cord during surgical maneuvers. MEPs assess the integrity of the motor pathways and can help in gauging the functional state of the spinal cord throughout manipulative procedures like distraction.

In contrast, dorsal root stimulation primarily assesses the nerve roots rather than directly