Newly created neurons integrate into existing neural circuits during adulthood
Extensive neuroscientific evidence from rodent and human studies confirms that newly created neurons in the adult brain structurally mature, form functional synaptic connections, and integrate into existing neural circuits.
The retrieved papers provide robust, consistent empirical evidence demonstrating that adult-born neurons undergo maturation, form synaptic connections, and functionally integrate into existing hippocampal circuits.
Takashi Kitamura, Yoshito Saitoh, Akiko Murayama, Hiroyuki Sugiyama, Kaoru Inokuchi. LTP induction within a narrow critical period of immature stages enhances the survival of newly generated neurons in the adult rat dentate gyrus. 2010. https://doi.org/10.1186/1756-6606-3-13
This study demonstrates that immature neurons in the adult rat dentate gyrus form functional connections and their survival is enhanced by activity.
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Chien-Chung Chen, Chiung‐Chun Huang, K. Hsu. Chronic Social Stress Affects Synaptic Maturation of Newly Generated Neurons in the Adult Mouse Dentate Gyrus. 2015. https://doi.org/10.1093/ijnp/pyv097
This paper evaluates morphological and electrophysiological maturation and synaptic integration of adult-born dentate granule cells under chronic stress.
M. Cambiaghi, R. Crupi, Erick Larios Bautista, Amir Elsamadisi, W. Malik, Helen Pozdniakova, Zhiyong Han, M. Buffelli, F. Battaglia. The Effects of 1-Hz rTMS on Emotional Behavior and Dendritic Complexity of Mature and Newly Generated Dentate Gyrus Neurons in Male Mice. 2020. https://doi.org/10.3390/ijerph17114074
The research investigates structural plasticity and dendritic complexity in newly generated dentate gyrus neurons in adult mice.
Mostafa M, Disouky A, Lazarov O. Therapeutic modulation of neurogenesis to improve hippocampal plasticity and cognition in aging and Alzheimer's disease.. 2025. https://doi.org/10.1016/j.neurot.2025.e00580
This review highlights how new neurons incorporate into the dentate gyrus and form functional synapses with the entorhinal cortex and CA3 region.
M. Allegra, M. Caleo. Adult neurogenesis in intellectual disabilities. 2017. https://doi.org/10.18632/oncotarget.18476
The article describes how adult-born neurons undergo morphological maturation, axonal extension, dendritic arborization, and functional integration into brain networks.
Blin N, Charrier V, Farrugia F, Palhol J, Presset A, Cartier E, Oliet S, Pacary E, Koehl M, Lie DC, Masachs N, Abrous DN. Long-lived adult-born hippocampal neurons promote successful cognitive aging.. 2026. https://doi.org/10.1038/s41380-025-03286-5
This study examines the survival, morphology, and glutamatergic connectivity of long-lived adult-born neurons generated during early adult life in rats.
Doludda B, Barde W, D'Egidio F, Fitzsimons CP, Frisén J, Gage FH, Jessberger S, Lazarov O, Lie DC, Lucassen PJ, de Lucia C, Salta E, Song H, Song J, Thuret S, Toda T, Kempermann G. Adult neurogenesis: New neurons, new opportunities.. 2026. https://doi.org/10.1016/j.stem.2026.01.014
This overview notes strong scientific consensus that adult neurogenesis occurs and that newborn neurons integrate into hippocampal circuitry to influence brain function.
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