Internally versus externally mediated triggers in the acquisition of visual targets in the horizontal plane.

Highlights: [•] We studied eye–head coordination during visual target acquisition. [•] The motor pattern of target acquisition depends on the way of triggering the command. [•] There is difference in performance between a verbally given and a memorized command. [•] The difference concerns latency, head velocity, acceleration and amplitude. [•] The results from this investigation have operational importance. [ABSTRACT FROM AUTHOR]