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When he was first injured he could only communicate by blinking and clicking, and his injury is the worst level of tetraplegia – paralysed from the neck down and on a ventilator.

Medical professionals call it a tetraplegia spinal injury, resulting in an inability to move the upper and lower parts of the body.

An injury that high can often affect all four limbs, called tetraplegia.

Sirio has spastic tetraplegia, a form of cerebral palsy that affects the movement of three limbs.

Tetra comes from the first half of tetraplegia and bond from vagabond.