These are connected to each other via joints:
- The malleus moves the incus.
- Malleus and incus move as a whole
around a joint axis.
- The incus transmits the movements to
the stapes or its footplate.
- The footplate is pressed into the oval window.
Lever effects mean that the sound is amplified twentyfold during transmission from eardrum to inner ear.
Information and ideas:
The graphic is good for understanding the transmission of vibrations in the hearing organ.
Relevant for teaching:
Structure and functions of a sense organ
Reception of stimuli and transmission of information
Functions of senses