Web-based Rehab After Acute Vertigo

Inclusion Criteria: * ≥18 years old; and * The subject has given written consent to participate in the study; and * New acute onset dizziness or vertigo since ≥24 hours with pathological spontaneous or gaze-evoked nystagmus (i.e. an acute vestibular syndrome, AVS). The nystagmus as described above must be present at investigation between 24 hours and 7 days from onset, spontaneously, gaze-evoked or head-shake evoked and documented; and * Screening and inclusion within 7 days of onset of continuous symptoms; and * Symptomatic at inclusion Exclusion Criteria: * Pre-existing vestibular disease or neurological disease anticipated to affect the ability to participate in the study or the effect of the intervention. N.B: Recurring AVS with no set diagnosis before inclusion is accepted, as is past transient neurological diseases such as TIA or migraine; or * Inability to use the online rehabilitation tool, e.g. due to not having access to a computer, tablet or smartphone, not having access to the internet or lacking in experience with such tools; or * Mental inability, reluctance or language difficulties that result in difficulty understanding the meaning of study participation; or * Medical and/or physical contraindications to making the required head movements (e.g. vertebral dissection) or otherwise participating in the training and testing exercises or data collection; or * Medication or other substance intake which can affect the ability to participate in the study or the reliability of the measurement methods. These medications include regular use of: Anticonvulsants, antiemetics/motion sickness medications, benzodiazepines, neuroleptics. Transient corticosteroid and/or antiemetic treatment related to the current vertigo is accepted.