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why do we frown when concentrating?
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Do you pull faces when concentrating ?
Started by Karen W.Board Physiology & Medicine |
Replies: 4 Views: 9929 |
12/11/2008 14:44:50 by DoctorBeaver |
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Why Does It Take More Muscles To Frown Than To Smile ?
Started by neilepBoard Physiology & Medicine |
Replies: 2 Views: 4484 |
13/06/2009 11:41:43 by neilep |