Vestibular information is necessary for maintaining metric properties of representational space: Evidence from mental imagery

► Mental imagery deficits depend on the extent (bilateral vs. unilateral) of vestibular loss. ► Mental rotation of 3D objects is also impaired. ► Vestibular loss disrupts mental scanning in unfamiliar and in familiar environments. ► Mental imagery deficits decrease with vestibular compensation. ► Neural networks common to vestibular processing and mental imagery are disorganized.