incus

Function

• the 3 auditory ossicles (incus, malleus, staps) facilitate transmission of sound from the tympanic membrane to the vestibular (oval) window
• the incus is the middle of the 3 auditory ossicles
• the incus articulates with both the malleus & the stapes completing the connection from the tympanic membrane to the vestibular (oval) window.

Structure

• the incus has a body & 2 processes (long crus & short crus)
• at the tip of the long crus is a small knob, the lenticular process which articulates with the head of the stapes
• the body of the incus articulates with the head of the malleus

More general terms

• ear ossicle