The origin of contraversive pushing

Abstract

A separate pathway seems to be present in humans for sensing the orientation of gravity apart from the one for orientation perception of the visual world. This second graviceptive system decisively contributes to humans' control of upright body posture. Contraversive pushing occurring after stroke lesions may represent the behavioral correlate of a disturbed neural representation of this system.

Vibration Applied to the Lateral Muscle of the Neck Induces Ipsilateral Body Sway during Sit-to-Stand Exercise in Healthy Adults – A Pilot Study

“…Previous studies have shown that vibration can induce body sway during standing or gait [11]. However, there have been no previous reports relating to vibration-induced body sway during sitting to standing movement.…”

“…If the vibration-induced lateral body sway during sitting to standing originates from the sensation of deviation to the subjective vertical axis, then this method can be a useful interventional method for stroke patients with contraversive pushing, because this phenomenon originates from the deviation of sensation related to the subjective vertical axis [11].…”

Controle postural na síndrome de Pusher: influência dos canais semicirculares laterais

“…In this aspect, the study of SVV demonstrates inclination to one side in patients with peripheral and central vestibular dysfunctions, a fact that does not occur in patients with Pusher syndrome 16 . The results of the present study indicate that the dysfunction of the semicircular canals also seems to be essential for the expression of Pusher syndrome.…”

“…Up to recently, the influence of the vestibular system in the manifestations of Pusher syndrome had only been investigated by tests that assessed the otolithic function 16 . In this aspect, the study of SVV demonstrates inclination to one side in patients with peripheral and central vestibular dysfunctions, a fact that does not occur in patients with Pusher syndrome 16 .…”

“…Patients with Pusher syndrome present a significant body orientation disorder in relation to gravity acceleration 16 . When seated down on a reclining chain on the frontal plan, with lateral protection and without visual support, these patients sit vertically when positioned with inclination ipsilateral to the damage 18 .…”