It is located just rostral and medial to the base of the pinna or external ear (Fig. 1). Figure 1: An anesthetized chinchilla in ventral recumbency with tympanic bulla (arrow) visible at the site ...

Our auricular muscles are vestigial, remaining part of our bodies while losing their function – moving the pinna, the outer ear – as evolution took its course. “The exact reason these became ...

They explained that the muscles helped change the shape of the pinna, or the shell of the ear, funneling sound to the eardrums. Millions of years ago, our ancestors stopped using them, so humans ...

Ear (aural) hematomas occur when blood vessels in the pinna rupture secondary to trauma or excessive head shaking. Blood fills the space between the skin and the cartilage, causing pain and ...