unilateral snags vs central snags

[billyzaf]

Hi, I just wanted to ask, what is the indication for choosing a unilateral snag instead of a central snag? Also what is the mechanism of a unilateral snag? Doesn't this pressure block the rotation towards one side?I've seen it work on patients but the mechanism escapes me.

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[inphysio]

The indication for unilateral snags would be, of course, unilateral symptoms. It also depends upon your assessment (PPIVM and PAIVM) also. The pressure given through your thumb/finger should be just enough to gilde the apophyseal joint and not to block the movement.