Errors in pointing to remembered target locations in 3-D space were st
udied when subjects were free to move their heads, and when they rotat
ed their heads to the extreme right or left. Relative to pointing when
the head was free to move, head rotations to the right shifted the fi
nal position of the responding arm to the left, whereas head rotations
to the left shifted the final position of arm to the right. Horizonta
l rotation of the head had no systematic influence on elevation and ra
dial distance errors. The influence of head rotations on pointing erro
rs may be mediated by small shifts in the internal representation of e
xternal space, shifting the presentation of space in the opposite dire
ction of the head rotation.