Damage around the aqueduct

The fourth ventricle is connected to the midbrain aqueduct, and the lower end communicates with the subarachnoid space through a lateral hole. Its position is equivalent to the cerebellar pontine angle, and the middle hole communicates with the occipital cistern. The fourth ventricle receives cerebrospinal fluid flowing from the third ventricle through the midbrain aqueduct, and flows to the subarachnoid space through the mesopores or lateral holes, and then enters the venous system through the arachnoid particles. The bottom of the fourth ventricle is diamond-shaped, and the nucleus of the pontine and the medulla oblongata are mostly adjacent to this, such as the sublingual nucleus of the medulla, dorsal vagus nucleus, cochlea, and vestibular nucleus; the facial nucleus of the pontine, trigeminal motor nucleus, and Sensory nucleus of the trigeminal nerve. Progressive damage to the gray matter around the aqueduct may be responsible for prolonging the onset of headaches and turning chronic migraines into chronic migraines. When a tumor occurs in the fourth ventricle, the cerebrospinal fluid circulation is first blocked, and when the tumor spreads around the ventricle or compresses the surrounding tissues, corresponding clinical symptoms will occur, which will result in corresponding clinical symptoms, mainly cranial nerve damage. symptom.