It is extremely difficult to determine the extent to which brain injuries productive of sensory and motor aphasia also affect the use of subvocal language. Goldhamer suggests that one of the methods of studying this problem would be the investigation of speech patterns in dreams.

Twelve aphasic patients who were in a position to understand the inquiry denied having dreams. The two patients whose dreams are reported stated that this dream was the only dream they had. Perhaps the apparent poverty of the dream life in the aphasic patient may in itself be significant. At any rate, language was used in the two dreams reported. In both cases there was difficulty in using language in the dream although it was less than in the waking state.