Learned Helplessness

The Ugo Basile Learned Helplessness system (Cat. 47502/47503) models the neurobiological underpinnings of stress-induced depression and analgesia. Rodents exposed to inescapable, unpredictable foot shocks develop characteristic deficits in subsequent learning tasks and exhibit stress-induced analgesia (SIA) — both validated translational endpoints for antidepressant and analgesic research.

The sophisticated shock generator delivers programmable random shock trains with variable durations and intervals. A 12-inch touch-screen controller manages up to 4 animals simultaneously, and the system integrates into the Beehive Cage-Manager System for expanded multi-cage configurations.

Key Features

• Inescapable, randomizable shock delivery for stress induction
• Programmable complex shock trains (duration and interval control)
• 12-inch touch-screen controller for up to 4 animals
• Available for mice (47503) and rats (47502)
• Compatible with Beehive Cage-Manager System expansion
• Reporting software for data collection and visualization

Research Applications

The Learned Helplessness model is a pivotal paradigm in stress and depression research, providing a behaviorally validated analog of the "giving up" response seen in clinical depression. The model is sensitive to antidepressant treatments and generates stress-induced analgesia, enabling concurrent pain and mood assessments.

• Depression modeling: Inducing helplessness-like states through inescapable stress for antidepressant evaluation
• Stress-induced analgesia (SIA): Measuring endogenous pain modulation following unavoidable stress
• Antidepressant screening: Testing compounds that reverse helplessness-induced learning deficits
• PTSD models: Studying the behavioral consequences of uncontrollable aversive events
• Neurobiological mechanisms: Investigating HPA axis, monoamine, and neuroplasticity responses to chronic stress