Table 2.
Description | |
---|---|
Silent bared-teeth display (SBT) | The mouth may be slightly open or closed, lips withdrawn and mouth corners retracted laterally, and the teeth fully exposed. Eyes may be open or squinted. The lack of vocalizations helps define this from the other bared-teeth expressions. |
Vocalized bared-teeth display (VBT) |
The mouth can be partially open, corners are retracted, lips withdrawn with varying degrees of lateral lip retraction, but teeth are fully exposed. When very intense, wrinkles around the cheeks appear as mouth corners are obliquely retracted. Vocalizations are loud and high-pitched screams that are often very hoarse, can be voiced on the inhalation, and can sound like “aich-aich” panting or “eech” squeaks. These are usually sustained for several seconds, but can also quickly spasmodic, turning into a sustained tantrum/distress episode. Not to be confused with the open scream mouth, where the mouth is wide open, with lips fully withdrawn, exposing the teeth completely, and vocalizations include loud harsh screaming like “aach – aach”. |