Investigation of the biological basis of speech production and stuttering

Investigation of the biological basis of speech production and stuttering - BGSS

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00004680

Enrollment

660

Registered

2013-02-07

Start date

2013-03-01

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

F98.5

Interventions

Group 1: There are two experimental groups. The case group consists of stuttering patients. They provide in the context of the study a genetic sample, a handscan (to measure prenatal testosterone) and

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: The patient group must consist of persons who stutter. The control group consists of healthy participants.

Exclusion criteria

Exclusion criteria: A history of psychiatric / neurological disorder (exception stuttering in the patient group)

Design outcomes

Primary

Measure	Time frame
One primary outcome of the study is reached after defining the role of dopaminergic/serotonergic polymorphisms for stuttering. A further primary outcome is to clarify the role of prenatal testosterone for stuttering (2D:4D study). A further primary endpoint is the investigation of the basal ganglia and its role in stuttering in the MRI study.	—

Secondary

Measure	Time frame
A secondary outcome is to produce new hypothesis on candidate genes for stuttering from the results of the experiments and MRI data.	—

Countries

Germany

Contacts

Public ContactChristian Montag

Institut für Psychologie, Universität Bonn

christian.montag@uni-bonn-diff.de0228/734309

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026