Does anyone recognise this test?

I was in hospital for 3 weeks with many horrible symptoms I won’t bore everyone with, and I was told I have 2 brain lesions. I was sent for evoked potentials test (the visual checkerboard one) and then they attached an electrode to each ankle in turn and shot a current through it repeatedly for about a minute. Does anyone know what this test is for? I understand the first one is for MS but no one told me anything about the second one.

The test is a sensory evoked potential test - it tests the nerve responses from the brain to the feet etc. and gives the neurologist more information as to whether the nerve impulses are working correctly.

Many thanks

No probs x