Disoriented vs. Disorientated [duplicate]

verbs adjectives suffixes transatlantic-differences

It is British English.

If I'm disoriented them I'm unsure which way is up; I might feel sick and dizzy. Associations similar to vertigo. I could get disoriented flying an aircraft in thick fog or scuba diving in low visibility. Playing a computer game I could become disoriented, certainly, if the images are moving too fast for my brain to make sense of them properly.

If I'm disorientated then I'm simply lost. I'm feeling ok but I don't know where I am in relation to my surroundings. If I'm metaphorically disorientated then I'm confused, e.g. I might be disorientated by a new job.

If I'm disoriented then I am spatially disorientated; I have lost spacial orientation.

Spatial disorientation, the inability of a person to determine his true body position, motion, and altitude relative to the earth or his surroundings. Both airplane pilots and underwater divers encounter the phenomenon.

http://www.britannica.com/EBchecked/topic/558427/spatial-disorientation

So disorientated has more of a topographical implication whereas disoriented is more sensory.

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