Search results
Results from the WOW.Com Content Network
Craniomandibular osteopathy, also known as lion's jaw, is a developmental disease in dogs causing extensive bony changes in the mandible and skull.In this disease, a cyclical resorption of normal bone and replacement by immature bone occurs along the inner and outer surfaces of the affected bones. [1]
The auditory bulla (pl. bullae) is a hollow bony structure on the ventral, posterior portion of the skull that encloses parts of the middle and inner ear. In most species, it is formed by the tympanic part of the temporal bone. [2]
The tympanic bulla in pakicetid ears is similar to those in all cetaceans, with a relatively thin lateral wall and thickened medial part known as the involucrum. However, in contrast to later cetaceans, the tympanic bone makes contact with the periotic bone which is firmly attached to the skull leaving no space for isolating air sinuses ...
The middle ear includes the tympanic cavity and the three ossicles. The inner ear sits in the bony labyrinth, and contains structures which are key to several senses: the semicircular canals, which enable balance and eye tracking when moving; the utricle and saccule, which enable balance when stationary; and the cochlea, which enables hearing.
[3] [11] Dogs suffering systemic manifestations of the disorder often have poorer prognoses. Systemic manifestations include fever, multiple body organ inflammation, nasal (nose) and ocular (eye) discharge, diarrhea, hyperkeratosis of the foot pads, pneumonia , and tooth enamel hypoplasia (many of these symptoms overlap with symptoms of CDV).
In many mammals this is a separate tympanic bone derived from the angular bone of the reptilian lower jaw, and, in some cases, it has an additional entotympanic bone. The auditory bulla is homologous with the tympanic part of the temporal bone. [8] Two parts of the hyoid arch: the styloid process.
[83]: 47 The tympanic bullae are large, convex, and almost spherical in wolves, while the bullae of dogs are smaller, compressed, and slightly crumpled. [84] Dogs have a distinctive "stop" between the forehead and nose. [85] Domestic dogs are distinguishable from wolves by starch gel electrophoresis of red blood cell acid phosphatase. [86]
A bony structure of the middle and inner ear, the auditory bulla, is composed of two compact and dense bones (the periotic and tympanic). It is housed in a cavity in the middle ear; in the Odontoceti (apart from in the physeterids , this cavity is filled with dense foam and completely surrounds the bulla, which is connected to the skull only by ...