Figure 3.

A, B, Frequency response characteristics of PH-BT cells during rotation (A) and translation (B). Response gains and phases are expressed relative to head velocity during either rotation or translation both in the presence (gray curves) and absence (dashed black curves) of visual feedback (i.e., light and dark conditions, respectively). The majority of cells (86%) responded to ipsilaterally directed eye or contralaterally directed head motion. Cell response phase has, thus, been expressed relative to contralaterally directed head velocity. Response phase in three cells that were excited for contralaterally directed eye or ipsilaterally directed head motion has been transposed by 180° to facilitate comparison with the dynamic characteristics of the other cells.