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  • Brain and Nervous System

    ... It consists of the cerebrum — the area with all the folds and grooves typically
    seen in pictures of the brain — as well as some other structures ...

  • Methamphetamine (Meth)

    ... carries messages between nerve cells in the brain. It's responsible for
    messages about motivation, pleasure, and motor skills. ...

  • Sports and Concussions

    ... A fall or collision that makes the brain bang against the skull can bruise the
    brain. It also can tear blood vessels and injure nerves. ...

  • Endocrine System

    ... It secretes melatonin (pronounced: meh-luh-TOE-nin), a hormone that may
    help regulate when you sleep at night and when you wake in the ...

  • PCP

    ... PCP acts on the neurotransmitters dopamine and glutamate in the brain. It
    affects the user's memory, ability to process emotion, and learning ability. ...

  • Sickle Cell Disease

    ... trouble breathing. When sickle-shaped cells block blood vessels in the
    brain, it puts people at risk of having a stroke. Signs ...