Developmental analysis of visually evoked defensive behavior identifies age and sex-specific responses and underlying
Georgia Lee Albrecht1, Rebekah Ramirez1, Delaram Moradpour1
1Department of Biology, Texas A&M University, College Station, TX 77843, USA.
Abstract:
Defensive behaviors such as freezing and escaping are crucial for survival, involving the complex integration of sensory and motor circuits. While instinctive, the ability to discern threat and adapt responsiveness is acquired through life experience, shaped by sensory maturation and emotional state. Disrupting these processes by sensory deprivation or chronic stress can induce disproportionate reactions, underscoring the need for a comprehensive understanding of age and sex-specific variations in defensive responses and adaptation. Here, we employed behavioral testing and immunohistochemistry to analyze visually evoked defensive responses and synaptic and glial development in the superficial superior colliculus (sSC) and dorsal periaqueductal gray (dPAG). Our findings demonstrate distinct age and sex-dependent behavioral profiles that are correlated with synaptic and glial changes in these brain regions. This study provides critical insights into the establishment and adaptation of visual threat responses and underlying circuits, laying the groundwork for future investigations into the cellular mechanisms governing defensive behaviors.
More Related Videos
Related Concept Videos
Fixed Action Patterns
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Cells of the Adaptive Immune Response
B Cell Activation and Differentiation
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Natural Selection and Mating Preferences
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...
Criticisms of the Evolutionary Perspective
Evolutionary psychology provides one explanation for these findings, suggesting...


