Vestibular rehabilitation and balance training. Twice a week for eight weeks.Outcome measures and tests at baseline, after 8 weeks and 6 months after the injury.

Multidisciplinary evaluation. Outcome measures and tests at baseline, after 8 weeks and 6 months after the injury.

Multidisciplinary assessment and evaluation and VR - Vestibular rehabilitation and balance training. Individually adjusted exercises in groups twice a week for two months. Home exercise program.

The Dizziness Handicap Inventory (DHI) was developed to measure the self-perceived level of handicap associated with the symptom of dizziness (Jacobson, 1990). The DHI is a 25 item self-report questionnaire with 3 response levels: yes = 4, sometimes = 2, no = 0. The total score is obtained by summing the ordinal scale responses obtained from the 3 response levels (0-100, higher score indicates worse handicap) (Jacobson, 1990).

The DHI has been translated into Norwegian and has demonstrated satisfactory measurement properties (Tamber, 2009).

The HiMAT is a uni-dimensional performance-based measure of balance and mobility. It consists of 13 walking, running, skipping, hopping and stair items that are measured either by a stopwatch or tape-measure. Raw scores measured in times and distances are noted and converted to a score on a 5-point scale from 0-4, except the two dependent stair items that are rated on a 6- point scale from 0-5. A 0 corresponds to inability to perform the item, and 1 -4/5 represents increasing levels of ability. The sum score range is 0-54 (worst-best). A user/instruction manual for the testers describing the test in detail is developed. (Williams, 2006;Williams, 2006).

The Bess is a standardized balance testing system. It consists of three 20 second, standardized stances on a firm surface and on a foam surface with eyes closed. The stances are: double leg stance, single-leg stance and tandem stance. Errors are counted during each 20-second trial(Bell, 2011;Finnoff, 2009). The Bess has variable but satisfactory measurement properties and norms are developed (Bell, 2011).