Final answer:
Inconsistencies between visual/motor feedback and vestibular information can cause imbalance or disorientation, and are critical in tasks like walking in a straight line. These inconsistencies can result in motion sickness or difficulty maintaining balance, especially if the cerebellum or vestibular system is compromised.
Step-by-step explanation:
The effect when visual and/or motor feedback is inconsistent with vestibular information is often a sensation of imbalance or disorientation. This is due to the fact that walking in a straight line requires the integration of motor commands from the primary motor cortex, proprioceptive feedback, vestibular sensory feedback, and visual cues. When these systems are not in agreement, as may occur if the cerebellum is compromised by substances like alcohol, or in the case of vestibular damage seen in conditions like Ménière's disease, it results in difficulties maintaining balance. Furthermore, conflicts between visual and vestibular inputs can lead to motion sickness, illustrating the delicate balance required for proper vestibular function.