A test performed overnight in a sleep lab or with an at-home monitor to measure brain waves, breathing, oxygen, heart rate, and movement during sleep.

• Helps diagnose sleep apnea, insomnia, periodic limb movement, or nighttime breathing issues.
• Conducted by a sleep medicine specialist.
• Results can inform supports for attention, daytime fatigue, or behavioral regulation, since sleep directly affects learning and mood.
• Key Outcome: Polysomnography Report detailing sleep stages, disturbances, and treatment recommendations (e.g., CPAP, behavioral strategies).