Abstract
The anatomy and physiology of the stapedius muscle and tendon and the blood supply of the incus and stapes are considered in detail in order to throw further light on the effect of division of the stapedius tendon during surgery of the middle ear. The intratympanic muscles contribute much of value to the hearing process. Dissections of the middle ear and observations at operation have been made to ascertain the variations in the insertion of the stapedius tendon.No notable effect on the hearing after stapes operations has been found when the stapedius tendon was preserved.The stapedius reflex is preserved after certain stapes operations. The stapedius tendon carries an important blood supply to the lenticular process of the incus the value of which increases after removal of the crura and head of the stapes. If the attachment of the stapedius tendon to the incus remains intact after operation necrosis of the lenticular process and distal long process of the incus rarely if ever occurs.
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