III.   Biological Systems (PSYBIO)

Equilibrioception, also known as “balance” is the ability to sense body movement, direction, and acceleration, and to attain and maintain postural equilibrium and balance.

For Level V life forms with complex voluntary neural and muscular systems, balance is achieved through the natural equivalent to a "gyroscope", being the vestibular system of fine hollow ear bones as part of the ear providing a fluid balancing system for pitch (up / down), roll (over) and yaw (direction coordinates around).