Idiopathic stammering begins at some time between the onset of speech and puberty, mostly between 2–5 years of age. Acquired stammering at a later age due to brain damage is rare. The prevalence of stammering (the percentage of the population actually stammering at any point in time) is approximately 0·9 per cent. Three times as many boys as girls stammer. About 70 per cent of stammering children recover with little or no therapy. Stammerers have not been shown to demonstrate di?erences in personality from non-stammerers; there are, however, indications that at least some stammerers show minimal di?erences from ?uent speakers in cerebral processing of verbal material.
There is a genetic predisposition towards stammering. The risk of stammering among ?rst-degree relatives of stammerers is more than three times the population risk. In 77 per cent of identical twins, either both stammer or both are ?uent. Only 33 per cent of non-identical twins agree in this way. As there are identical twins who di?er for stammering, environmental factors must be important for some stammerers. There are relatively large numbers of stammerers in highly competitive societies, where status and prestige are important and high standards of speech competence are valued.
Di?erent treatments have been demonstrated to produce considerable bene?t, their basic outline being similar. A long period of time is spent in training stammerers to speak in a di?erent way (?uency-shaping techniques). This may include slowing down the rate of speech, gentle onset of utterance, continuous ?ow with correct juncturing, etc. When the targets have been achieved within the clinic, a series of planned speech assignments outside the clinic is undertaken. In these assignments, and initially in everyday situations, the ?uency-enchancing techniques have to be used conscientiously. Gradually speech is shaped towards normality requiring less and less e?ort. Therapy may also include some work on attitude change (i.e. helping the client to see him or herself as a ?uent speaker) and possibly general communicative skills training.
For information about organisations concerned with stammering, see Appendix 2.... stammering
Apoptosis occurs in embryonic development, when the shaping of body parts is taking place and continues throughout life in the constant cycle of death and renewal of body cells.
Failure of apoptosis is implicated in the development of cancers.... apoptosis
A suffix meaning shaping by surgery; performing plastic surgery on.... plastic surgery
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