The influence of inner and heard speech in arts speech therapy on brain oxygenation and hemodynamics

Klein, Sabine; Scholkmann, Felix; Wolf, Martin; Wolf, Ursula (2014). The influence of inner and heard speech in arts speech therapy on brain oxygenation and hemodynamics. Journal of alternative and complementary medicine, 20(5), A78. Mary Ann Liebert 10.1089/acm.2014.5204

Purpose: Artistic speech therapy is applied in anthroposophically extended medicine to treat several diseases. The aim is to understand the physiology by investigating the effect of inner and heard speech on brain hemodynamics and oxygenation and analyzing whether these changes were affected by changes in arterial carbon dioxide pressure.
Methods: In 29 healthy adult volunteers changes in cerebral absolute oxyhemoglobin ([O2Hb]), deoxyhemoglobin ([HHb]), total hemoglobin ([tHb]) concentrations and tissue oxygen saturation (StO2) were measured by functional near-infrared spectroscopy (fNIRS). End-tidal CO2 (PETCO2) was assessed by capnography. Each subject performed six tasks: inner speech, heard speech from a person and heard speech from a record with
each two different recitation texts: hexameter and alliteration according to a randomized crossover design.
Results: Significant changes during tasks: A decrease in StO2, [O2Hb], [tHb] and PETCO2 (only for inner speech); an increase in [HHb]. There was a significant difference between hexameter and alliteration. Particularly, changes in [tHb] at the left prefrontal cortex during tasks and after them were statistically different. Furthermore we found significant relations between changes in [O2Hb], [HHb], [tHb] or StO2 and the participants’ age, the baseline PETCO2, or certain speech tasks.
Conclusion: During the inner speech, hyperventilation led to a lower PETCO2 (hypocapnia). During heard speech no significant changes in PETCO2 occurred. But decreases in StO2, [O2Hb], [tHb] suggest hypocapnia also here. Hexameter and
alliteration led to different changes in [tHb]. Consequently, our parameters are affected by an interplay of both PETCO2 response and task dependent functional brain activity.

Item Type:

Conference or Workshop Item (Poster)


04 Faculty of Medicine > Medical Education > Institute of Complementary and Integrative Medicine (IKIM)

UniBE Contributor:

Klein, Sabine; Scholkmann, Felix and Wolf, Ursula


600 Technology > 610 Medicine & health




Mary Ann Liebert




Sabine Klein

Date Deposited:

24 Sep 2014 09:51

Last Modified:

28 Nov 2020 02:24

Publisher DOI:


PubMed ID:



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