Genetics, molecular control and clinical relevance of habituation learning.

Habituation is how our brains learn to ignore repeated, unimportant sounds or sights - like tuning out background noise. This review found that this basic learning process doesn't work properly in autism and similar conditions. Researchers identified 258 genes that control habituation and suggest that testing habituation could help diagnose and treat neurodevelopmental conditions. The findings could lead to better understanding of how the brain processes information in autism.

This comprehensive review examines habituation learning, a fundamental cognitive process that acts as a protective mechanism against sensory overload. The researchers systematically identified 258 evolutionarily conserved genes involved in habituation across species and analyzed their biological pathways. The review presents evidence that habituation deficits are present in autism and related neurodevelopmental disorders (NDDs). The authors argue that habituation assessment could serve as a powerful translational tool connecting preclinical animal research with clinical applications, potentially advancing research, diagnostics, and treatment approaches for NDDs through its quantitative and disease-relevant nature.

Habituation assessment could potentially serve as a translational biomarker for autism and neurodevelopmental disorders. The identified genetic pathways may inform future therapeutic targets. Standardized habituation paradigms could enhance diagnostic accuracy and treatment monitoring in clinical practice.

As a review paper, findings depend on quality of included studies. The abstract does not specify selection criteria, number of studies reviewed, or methodological quality assessment. No sample sizes or effect sizes reported for the evidence presented.

Habituation is the most fundamental form of learning. As a firewall that protects our brain from sensory overload, it is indispensable for cognitive processes. Studies in humans and animal models provide increasing evidence that habituation is affected in autism and related monogenic neurodevelopmental disorders (NDDs). An integrated application of habituation assessment in NDDs and their animal models has unexploited potential for neuroscience and medical care.

With the aim to gain mechanistic insights, we systematically retrieved genes that have been demonstrated in the literature to underlie habituation. We identified 258 evolutionarily conserved genes across species, describe the biological processes they converge on, and highlight regulatory pathways and drugs that may alleviate habituation deficits. We also summarize current habituation paradigms and extract the most decisive arguments that support the crucial role of habituation for cognition in health and disease. We conclude that habituation is a conserved, quantitative, cognition- and disease-relevant process that can connect preclinical and clinical work, and hence is a powerful tool to advance research, diagnostics, and treatment of NDDs.