Table 7.

Magnitude of pitch and roll rotations, in degrees, required to bring each average semicircular canal’s prime direction into an earth-vertical plane so that canal’s sister canals will not be stimulated by an earth-horizontal rotation.

Canal	Pitch	Direction	Roll	Direction
Left HC	56.8	ND	11.7	LED
Left AC	25.4	NU	47.3	LED
Left PC	38.7	NU	43.0	RED
Right HC	56.5	ND	11.0	RED
Right AC	29.0	NU	45.7	RED
Right PC	40.2	NU	43.2	LED

HC, horizontal canal; AC, anterior canal; PC, posterior canal; ND = pitch nose down, NU = pitch nose up, RED = roll right ear down, LED = roll left ear down