Vertebral artery screening test (VAST): negative with hyperextension of the neck and rotation of the head to either side.

Oculomotor testing: saccades and pendular pursuit tracking poorly formed.

Gaze testing: direction changing nystagmus with vision denied in all eccentric eye positions

High-frequency head shake: elicited low intensity left beating nystagmus

Positional testing: head and body right elicited left-beating nystagmus

Hallpike: negative for BPPV

• Interpret these findings and speculate why the patient was not tested with calorics.