Whiskers (Vibrissa)
Whiskers (Vibrissae) are hairs, usually specialized for tactile sensation, that grow around the nostrils or other parts of the face of dogs.
The whiskers on dogs are highly sensitive to air currents and vibrations. Dogs react quickly when anything brushes against their whiskers.
Many dog groomers clip their dog's whiskers for show purposes, although it can often impair a dog's ability to hunt and play.
Whiskers consist of inert material and contain no nerves. What makes whiskers different from other hairs is that they are implanted in a special follicle sealed by a capsule of blood, called a blood sinus.
Touching a vibrissa causes it to bend, and the blood in the sinus is pushed to one side or the other. The blood amplifies the movement and allows the nerves at the base to detect extremely small deflections.
Whiskers offer an advantage to animals that do not always have sight to rely on to navigate or to find food, or when the usefulness of non-tactile senses is limited. Information from the vibrissea is transmitted and processed through the trigeminal nerve to brainstem and thalamus then barrel cortex of the brain.
Whiskers (Vibrissa)Whiskers (Vibrissae) are hairs, usually specialized for tactile sensation, that grow around the nostrils or other parts of the face of dogs.The whiskers on dogs are highly sensitive to air currents and vibrations. Dogs react quickly when anything brushes against their whiskers.Many dog groomers clip their dog's whiskers for show purposes, although it can often impair a dog's ability to hunt and play.Whiskers consist of inert material and contain no nerves. What makes whiskers different from other hairs is that they are implanted in a special follicle sealed by a capsule of blood, called a blood sinus.Touching a vibrissa causes it to bend, and the blood in the sinus is pushed to one side or the other. The blood amplifies the movement and allows the nerves at the base to detect extremely small deflections.Whiskers offer an advantage to animals that do not always have sight to rely on to navigate or to find food, or when the usefulness of non-tactile senses is limited. Information from the vibrissea is transmitted and processed through the trigeminal nerve to brainstem and thalamus then barrel cortex of the brain.
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