ANATOMY OF EYE MOVEMENTS

INDEX

Crista, Otoliths and Semicircular Canals

The vestibular ogans include the three cristae, and the two otolith organs: the saccule and the utricle.

Figure 1. The crista

   Each crista this lies within the ampulla of its respective semicircular canal: lateral, anterior, posterior.

 

Redrawn from: Fitzakerley J. 2015 Hearing & Balance. 
Retrieved from https://www.d.umn.edu/~jfitzake/Lectures/DMED/InnerEar/VestibPhysiol/SemicircCanals.html

Figure 2. The vestibular apparatus; the red dots indicatingthe three ampullae of the anterior, posterior and horizontal semicircular canals

   Right ear, viewed from the front.

 

 

Figure 3. The otolith organs: these lie within the maculae of the utricle and the saccule.

Redrawn from: https://www.britannica.com/science/macula

 

Figure 4. Three semicircular canals open into into the vestibule by means of five openings. 

   Note that the anterior (superior) and posterior semicircular canals are joined, and share one opening.
   The image shows the structures of the right ear, as viewed from the front.

Redrawn from: https://www.britannica.com/science/macula

 

 

Figure 4. Image  of the right ear, viewed from the front (that is, from the examiner's perspective)

   The middle ear is found between the tympanic membrane on the outer side and the cochlea on the inner side. 

 

 

 

 

References