Vestibular ataxia is a spatial orientation disorder caused by vestibular lesions, mainly balance disorders, manifesting unsteadiness in standing, leaning to the diseased side when walking, walking in a straight line, changing head position, and ataxic movements of the limbs; often accompanied by vertigo, vomiting, and nystagmus. The vestibular function of the inner ear is diminished or absent with the warming (hot and cold water) test or rotation test. The closer the lesion is to the inner ear vagus, the more ataxic it is. So, what are the ancillary tests for vestibular ataxia? The following are the auxiliary examinations for vestibular ataxia: 1. Cerebellar ataxia should be examined by brain CT or MRI to exclude cerebellar tumors, metastases, tuberculomas or abscesses and vascular disease and cerebellar degeneration and atrophy. If the lesion is located in peripheral nerve, electromyography and somatosensory evoked potentials should be examined; if the lesion is considered in posterior root lesion or posterior cord lesion, electromyography, evoked potentials, MRI of the lesion, cerebrospinal fluid examination, or myelography should be examined. It is better to check brain CT or MRI when thalamus or parietal lobe is considered. 3.Brain ataxia should check brain CT or MRI, EEG, etc. 4.Vestibular ataxia can be examined by electrical audiometry, auditory evoked potentials, vestibular function examination, etc.