Diurnal Profiles of the Endocrine Stress Response in Internet Gaming Disorder.

Background: Differences in subjective stress perception and acute response of the hypothalamic-pituitary-adrenal axis have been reported in internet gaming disorder (IGD). The present study aimed to further investigate alterations in diurnal profiles of the endocrine stress response system in IGD compared to healthy controls (HCs).

Methods: The diurnal course of endocrine markers (salivary cortisol and α-amylase) was investigated in a clinical sample of n = 29 adolescents with IGD compared to n = 26 HC.

Higher striatal glutamate in male youth with internet gaming disorder.

Internet gaming disorder (IGD) was included in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) as a research diagnosis, but little is known about its pathophysiology. Alterations in frontostriatal circuits appear to play a critical role in the development of addiction. Glutamate is considered an essential excitatory neurotransmitter in addictive disorders.

Excessive and pathological Internet use - Risk-behavior or psychopathology?

Pathological Internet use (but only with respect to gaming) is classified as mental disorder in the ICD-11. However, there is a large group of adolescents showing excessive Internet use, which may rather be considered adolescent risk-behavior. The aim was to test whether pathological and excessive Internet use should be considered as "psychopathology" or "risk-behavior".

[Relationship Between (Pathological) Internet Use and Sleep Problems in a Longitudinal Study].

Relationship Between (Pathological) Internet Use and Sleep Problems in a Longitudinal Study Excessive or pathological Internet use has already been associated with sleep disorders, but the direction of the connection remains still uncertain. The relationship between (pathological) Internet use and sleep problems in adolescence was investigated by a representative longitudinal survey of data from a sample of 1,060 students from Heidelberg and the surrounding area (SEYLE study). The students, on average 15 years old, responded at a baseline and after one year to a survey on sleep and Internet use.