The brain receives three different types of sensory input that help determine the body’s position:
Visual – feedback on what the eyes see
Vestibular- feedback on what the ears sense and how these signals relate to the feeling of equilibrium
Somatosensory – what we like to call the “touch” sensory input,
this is feedback on pressure, vibration, and position and movement
relative to other body parts, from the skin, joints, tendons, and
muscles.
These three inputs work
together for optimal balance and reactive skills. As you might imagine,
older dogs with impaired hearing or vision are likely to have
compromised balance skills.