DRUG DESCRIPTION. NAMENDA XR is an orally active NMDA receptor antagonist. The chemical name for memantine hydrochloride is 1-amino-3,5-dimethyladamantane hydrochloride with the following structural formula: The molecular formula is C12H21Nâ¢HCl and the molecular weight is 215.76.
There are three main parts to the ear, including the inner ear, middle ear and outer ear. In order for hearing to occur, there is a sequence of actions that must occur to transform waves of sound in the air into electrical impulses. These impulses are transmitted to the brain by the auditory (hearing) nerve.
Sound Transduction in the Ear. Sound Transduction is the process by which the ear senses ambient sounds and translates them into nerve impulses in order to relay the information to the brain. For patients with hearing conditions, doctors, and medical students alike it is important to know the mechanism behind hearing.his process description will illustrate the path sound waves take in order to reach the brain, and how the inner ear is capable of distinguishing between the range of frequencies a human hears (50- 18,000 Hz).