TINNITUS AND DEAFNESS IN CENTRAL LESIONS OF THE BRAIN
Deafness from Lesions of the Pons.Anatomy of the Pons.—From a diagnostic standpoint the pons may be divided dorsoventrally into three portions:
The tegmentum,92 lying in the center. It is the dorsal part of the pedunculus cerebri (the crus cerebri). It is also called area tegmentatis Forel—the diencephalomesencephalic junction. The tegmentum is associated with primitive kinetic and static mechanisms.
The basis, situated ventrally. The syndrome of disease of the pontile basis is predominantly motor, since the pyramidal tracts are located ventrally in the basis.
The tectum, situated dosally. It is the tectum mesencephali, the corpus quadrigeminum, which forms the roof of the midbrain. The superior colliculus93 makes up the rostral part of the tectum (Krieg94).
EAGLETON WP. ADVANCES IN THE UNDERSTANDING OF RHINOLOGIC AND OTOLOGIC CONDITIONS RELATED TO THE NERVOUS SYSTEMA Critical Survey of Recent Literature. Arch Otolaryngol. 1946;43(5):511–541. doi:10.1001/archotol.1946.00680050529007