 Paulina Carabajal and colleagues (2014) ct-scanned the skull, allowing for the generation of three-dimensional models of both the cranial endocast (the cast of the brain cavity) and the inner ear. Using these models, the cranial endocast was shown to encompass 94 to 98 milliliters (0.025 to 0.026 U.S. gallons) in volume. The inner ear was 30 millimeters (1.2 inches) tall and 22 millimeters (0.87 inches) wide. The lagena, the part containing the hair cells for hearing, was rather short, indicating that the sense of hearing would have been poorer in Amargasaurus than in other sauropods for which inner ears have been studied.
