Figure 5.

Brain activation during memory and discrimination of pain intensity. Memory-related activation overlapped partially with discrimination-related activation in left hemisphere, but not the right hemisphere. During interstimulus interval, subjects frequently (∼70% of trials) reported that they remembered the intensity of the T1 stimulus itself. Subjects rarely used verbal categorical strategies for the mnemonic phase of the intensity discrimination task. M1, Primary motor cortex. Slice locations are relative to standard stereotaxic space.