Final answer:
Ned likely consumed amphetamines based on his symptoms. Amphetamines are stimulant drugs that affect blood pressure, blood flow to the brain, and sleep.
Step-by-step explanation:
Ned likely consumed amphetamines based on the symptoms he is experiencing. Amphetamines are stimulant drugs that increase blood pressure and cause jittery feelings. It can also affect blood flow to the brain, which is indicated by the brain scan results. Amphetamines can interfere with sleep, causing insomnia.