Spatial learning induces neurogenesis in the avian brain

Area of Science:

• Neuroscience
• Behavioral Biology
• Avian Cognition

Background:

• Neuronal birth occurs continuously in the avian brain's ventricular zone.
• Behavioral experiences can influence neural development.

Purpose of the Study:

• To investigate how food-storing behavior affects cell proliferation and neurogenesis in the hippocampus (HP) and hyperstriatum ventrale (HV) of young marsh tits.
• To determine if increased neurogenesis accounts for observed increases in hippocampal cell numbers.

Main Methods:

• Marsh tits were divided into two groups: one group engaged in food storing and retrieval, while the control group did not.
• Cell proliferation rates in the ventricular zone were measured after initial trials (days 35-41).
• Total cell and neuronal numbers, as well as programmed cell death, were assessed in the hippocampus by day 56 posthatch.

Main Results:

• Birds with food-storing experience showed significantly higher cell proliferation rates compared to controls.
• Experienced birds exhibited a significant increase in total cell and neuronal numbers in the hippocampus by day 56.
• The daily rate of neurogenesis increased from 3.9% to 10% in experienced birds after early trials.
• No significant differences in programmed cell death were observed.

Conclusions:

• Food storing and retrieval behavior stimulates neurogenesis in the avian hippocampus.
• The increase in hippocampal neuronal number is attributable to enhanced neurogenesis driven by early behavioral experience.
• Behavioral plasticity plays a crucial role in modulating brain development in young birds.