Sensitive periods for hormonal programming of the brain

Area of Science:

• Neuroscience
• Developmental Biology
• Endocrinology

Background:

• Neural development is influenced by environmental and internal cues during specific sensitive periods.
• Hormones are key mediators of this programming, shaping brain development.
• Sexual differentiation of the brain serves as a primary example of hormonal programming.

Purpose of the Study:

• To define sensitive periods in brain development.
• To explore the cellular and molecular mechanisms underlying these sensitive periods.
• To examine the role of hormones in neural programming, including sexual differentiation and interactions with other hormonal systems.

Main Methods:

• Review of existing literature on hormonal programming and sensitive periods in neural development.
• Focus on sexual differentiation as a model system.
• Discussion of cellular and molecular processes involved.

Main Results:

• Sensitive periods are critical developmental windows where external and internal information programs the brain.
• Hormonal signaling, exemplified by sexual differentiation, is central to this programming.
• Challenges exist in precisely defining the temporal boundaries of these sensitive periods.

Conclusions:

• Hormonal programming during sensitive periods is fundamental to neural development.
• Understanding these processes, including sexual differentiation, is crucial for comprehending brain development.
• Interactions between different hormonal systems and sexual differentiation warrant further investigation.