For that Movie Kim Cattrell shaved her sideburns. Her Vulcan ears would look much stronger she thougt an did the cut.
Here's a pic of her sidecut.

Kim Catrell said:
I came into Nick [Meyer] after everything was settled and said I want to have traces of Leonard [Nimoy], so I dyed my hair black and had it done very sort of 1960s, and shaved my sideburns. I felt my ears would look much stronger because I have a very feminine face and I wanted to look very strong because I was a warrior.
Does anyone of you have got a "private" picture of her on the Star Trek set with the shaved hair? I just don't believe, that she really shaved her own hair...
Links, please?