Despite her campaign claiming it was pneumonia that led to her ill health in New York on Sunday, Hillary Clinton was caught on camera receiving a neurological test from someone who appeared to be a nurse.

The image shows Hillary grasping the woman's fingers with her fist, which is a classic motor neuron test to determine abnormalities in the nervous system.

The NYU School of Medicine details how the test is conducted;

"Test the patient's grip by having the patient hold the examiner's fingers in their fist tightly and instructing them not to let go while the examiner attempts to remove them. Normally the examiner cannot remove their fingers. This tests the forearm flexors and the intrinsic hand muscles. Compare the hands for strength asymmetry."

This is precisely what appears to be taking place in the image above. So why would Hillary be receiving a motor neuron test if she was only suffering from pneumonia, as her campaign claimed?

The explanation that Clinton's swaying and stumbling in the now infamous video represented a neurological problem rather than her being dehydrated is also a view shared by Dr. Zuhdi Jasser M.D.