Swiss doctors showed the case of a man who had an operation in the ear, but six months after the operation returned panic to the hospital, because of a vision disorder made him see the picture upside down for several seconds.
The study was published in the Frontiers Journal of Neuroscience and was reported by the French daily Le Monde.
The 47-year-old patient had a large occlusion in the ear, a tissue in the middle ear. This tissue destroyed the hammer and anvil bones, and invaded one of the three semicircular channels in the inner ear responsible for the rotation of the head. The system is responsible for balance and position.
After removal of the colystyum tumor, reconstruction of the two bones surgically and closure of the semi-circular submerged canal, the patient showed the characteristic disorders of the loss of the vestibular side, but improved after vestibular rehabilitation sessions, and returned to full-time work.
But six months after the operation, the patient returned to the hospital in panic, because of a vision disorder that made him see the picture upside down for several seconds, so he clung to the door of the car for fear of falling when he saw the ceiling down and the seats at the top.
The doctors determined that the patient is suffering from the persistent appearance of the image (neoplasia), the appearance of the image determined by the eye after the disappearance of the visual alarm, which is familiar, and may extend from seconds to a few minutes, and the picture is clear or unclear as the case.
These cases occur when the vestibular function is lost on the right side after surgical removal.
It is known that the vestibular signals reach the brain faster than the visual signals, in which case is what the patient saw not only from the eyes, but also from the vestibular system of the inner ear.
This patient is infected with the vestibular system with the safety of the functions of the ear organs. There is no temporal synchronization between visual and vestibular information, and according to doctors the vestibular signals reach the cortex well after visual information.
As a result, the patient sees the visual image he had before turning his head and is not aware of the new image in front of his eyes only when the vestibular information reaches the cerebral cortex, and so the patient continues to see what is not in front of his eyes for a moment.