Abstract
Speech disorders after hemiglossectomy in ele- ven cases of lingual cancer were studied and the following facts were obtaned.
1.In articulation organs, palatopharyngeal and lingual function were disturbed in all cases.
2.The results of articulation test in pronoun- ciation showed 90% in one case and those under 60 % conld not be found in the remainder.
3.By Sonagraph test, it was revealed that disturbance of vowel was caused by the injury of resonant cavity and that of consonant by the injury of the tongue.
4.Marked differences were noted in Hemiglos- sectomy between the cases where the root was resected and the cases where the root was left intact.
5.Speech function is recoverable by.compen- satory function of the rest of the tongue, which mobilizes its position to the median.posiion.
6.Those who spoke relatively well were past office-clerks who must use speech, or those 10 post- operativeyears.
7.For speech rehabilitation of the glossecto- mized cases, speech therapy was needed.
