The scenario you describe is highly unlikely and not supported by scientific evidence. While it is true that ants can explore different environments, including human dwellings, the idea that they would crawl into a person's ear and reach the brain is a misconception or an urban legend.
The human ear has a natural defense system to prevent insects or foreign objects from entering deep inside. The ear canal is not a direct route to the brain, as it is separated from the cranial cavity by the tympanic membrane (eardrum). The eardrum serves as a barrier, protecting the middle and inner ear structures, including the brain.
Furthermore, the ear canal has a slight curve, which makes it difficult for insects or other small objects to navigate and progress further. If an insect were to enter the ear, it would typically cause discomfort and prompt the person to seek medical attention before any significant harm occurs.
It's important to note that if you have concerns about insects or foreign objects entering your ear or experiencing any discomfort, it is always advisable to consult a healthcare professional for an accurate assessment and appropriate advice.