The elaboration of lexical gestures falls on a spectrum of iconic-metaphorical in how closely tied they are to the lexico-semantic content of the verbal speech they coordinate with. More iconic gesture very obviously mirrors the words being spoken (such as drawing a jagged horizontal line in the air to describe mountains) whereas more metaphorical gestures clearly contain some spatial relation to the semantic content of the co-occurring verbal speech, but the relationship between the gesture and the speech might be more ambiguous.