BiMe

Why do sensitive periods exist?

date
10.12.2018 
time
04:00 PM - 05:00 PM 
speaker
Willem E. Frankenhuis 
affiliation
Behavioural Science Institute, Radboud University 
part of series
BIOTEC Green Seminar 
language
en 
main topic
Biology: general
subtopics
Medicine: Regeneration
host
Prof. Gerd Kempermann 
abstract

AbstractSensitive periods are increasingly well-understood at the neural-physiological level. However, we know little about the evolutionary selection pressures that produce sensitive periods. In this talk, I will present a formal modeling approach to studying the evolution of sensitive periods. We model development as a specialization process during which individuals incrementally adapt to local environmental conditions, while sampling imperfect cues to the environmental state. We first compute optimal developmental mechanisms (i.e., decision rules) for a range of ecological conditions. Then we expose these mechanisms to experiences to obtain developmental trajectories and distributions of mature phenotypes. Our results show that genetically identical individuals who develop in the same environment diverge phenotypically due to stochastic variation in experiences. Moreover, the stability of individual differences increases with advancing age. These findings dovetail with empirical observations in rodents made at the CRT.
5 most recent papersFawcett, T. W., & Frankenhuis, W. E. (2015). Adaptive explanations for sensitive windows in development. Frontiers in Zoology, 12 (Suppl. 1): S3.
Frankenhuis, W. E., Nettle, D., & McNamara, J. M. (2018). Echoes of early life: Recent insights from mathematical modeling. Child Development, 89, 1504-1518.
Frankenhuis, W. E., & Panchanathan, K. (2011). Balancing sampling and specialization: An adaptationist model of incremental development. Proceedings of the Royal Society B, 278, 3558-3565.
Panchanathan, K., & Frankenhuis, W. E. (2016). The evolution of sensitive periods in a model of incremental development. Proceedings of the Royal Society B, 283, 20152439.
Stamps, J., & Frankenhuis, W. E. (2016). Bayesian models of development. Trends in Ecology and Evolution, 31, 260-268.

 

Last update: 10.12.2018 00:10.

venue 

DFG Center for Regenerative Therapies Dresden (CRTD, auditorium left) 
Fetscherstraße 105
01307 Dresden
telefon
+49 (0)351 458 82064 
fax
+49 (0)351 458 82059  
e-mail
DFG Center for Regenerative Therapies Dresden 
homepage
http://www.crt-dresden.de 

organizer 

DFG Center for Regenerative Therapies Dresden (CRTD)
Fetscherstraße 105
01307 Dresden
telefon
+49 (0)351 458 82064 
fax
+49 (0)351 458 82059 
e-mail
DFG Center for Regenerative Therapies Dresden (CRTD) 
homepage
http://www.crt-dresden.de 
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