What are the "lumps" in the A380 flight-deck? In this photograph of the Airbus A830 flight-deck there are two large "lumps" sticking up and out from the centre console, next to the engine thrust levers and flight-computer keypads:



I think they're just meant to be wrist-support for when pressing the keypad keys, but it seems odd to single-out that part of the flight-controls in particular for wrist-support. The lumps also seem rather tall to be used comfortably for extended periods (and I assume that's what the pull-out keyboards in the trays are for, so why bother having secondary keyboards down there in the first place?) - and it also hinders access to the 'inner' keys closer to the engine controls.
They are a different design of computer mouse:



As far as I can tell, the front disk is a track pad and the model in your picture has the mouse buttons on the front instead of the sides: