Balto BT Pull Brace for Phalangeal Hyperflexion Description Balto pull small phalangeal hyperflexion is a brace for neurological conditions such as limb paralysis with phalangeal hyperflexion affecting the sciatic nerve, common fibular nerve, brachial plexus, or radial nerve. The brace is useful in cases of neurological conditions that cause severe proprioceptive deficits, such that the dog is unable to perceive the position of its limb on the ground, thus tending to rest its paw on the ground