Changes

[[image: Rabbit ears.jpg|thumb|250px|left|Two rabbits: one with wild-type erect pinnae, the other with pendulous pinnae for comparison]]

[[image: Rabbit ears.jpg|thumb|250px|left|Two rabbits: one with wild-type erect pinnae, the other with pendulous pinnae for comparison]]

The functional shape of the pinna in wild-type mammals is erect, and the muscular connections at the base of the pinna allowing positional adjustments to efficiently collect sound.  Many domesticated species, however, have non-erect, pendulous pinnae, as a result of selective breeding.  This and other conformational changes may contribute to [[Special Senses - Pathology|aural disease]], particularly in the dog, but also other species including the lop-eared rabbit.

The functional shape of the pinna in wild-type mammals is erect, and the muscular connections at the base of the pinna allowing positional adjustments to efficiently collect sound.  Many domesticated species, however, have non-erect, pendulous pinnae, as a result of selective breeding.  This and other conformational changes may contribute to aural disease, particularly in the dog, but also other species including the lop-eared rabbit.

Proximally, the auricular cartilage is rolled into a funnel shape, known as the '''concha'''.  The '''scutiform''' cartilage lies rostromedially in the lower ear canal and provides support.  The '''annular''' cartilage lies between the proximal horizontal ear canal and the bony '''acoustic process''' of the [[Skull and Facial Muscles - Anatomy & Physiology#Temporal Bone (os temporale)|typmanic bulla]], connected by ligaments.  The vertical ear canal lies in a rostroventral orientation before bending medially to become the horizontal canal.

Proximally, the auricular cartilage is rolled into a funnel shape, known as the '''concha'''.  The '''scutiform''' cartilage lies rostromedially in the lower ear canal and provides support.  The '''annular''' cartilage lies between the proximal horizontal ear canal and the bony '''acoustic process''' of the [[Skull and Facial Muscles - Anatomy & Physiology#Temporal Bone (os temporale)|typmanic bulla]], connected by ligaments.  The vertical ear canal lies in a rostroventral orientation before bending medially to become the horizontal canal.

[[Integumentary_System_- Anatomy & Physiology_-_Flashcards#Feather_Flashcards|Feather Flashcards]]

[[Integumentary_System_- Anatomy & Physiology_-_Flashcards#Feather_Flashcards|Feather Flashcards]]

 

[[Category:Special Senses - Anatomy & Physiology]]

[[Category:Special Senses - Anatomy & Physiology]]