The Biological Destiny of the Oro-Facial Muscles
Abstract
The Biological Destiny of the OrolFacial Musclesâ E . GWYNNE-EVANS, MB, BS, MRCS, FCST(H0N) I believe there is a saying - âBats from a narrow spyhole, cannot see the world withoutâ I It was twenty-five years ago, when I first peeped out through the narrow spyhole of my head mirror to look at the world of Speech Therapy. In those early days, we formed a discussion group w t Miss Van Thal, Central School of ih Speech and Drama, Professor C. F. Ballard, Eastman Dental Hospital, Ernest Rix and Jack Tulley, later to become Professor W.J. Tulley, Orthodontic Department, Guyâs Hospital Dental School, under the aegis of the late Professor James Whillis, Anatomy Department, u Guyâs Hospital. O r conjoint interest was in the orofacial muscles in their evolutionary history and in the maturation of their behaviour in feeding, in facial expression and in speech. The ubiquitous orbicularis oris was the focus of our attention. Professor Ballard found the lower lip rebellious, often interfering with the proper alignment and relationship of the front teeth and with orthodontic measures to re-align them. The upper lip usually kept out of the fray! I wanted to know why - some children