Week 13 — The Central Nervous System
Why this matters
A future emergency medical technician judging which part of the brain an injury has reached and a coach watching an athlete's balance after a fall both read this week's map of the brain and spinal cord.
In plain language
Your brain and spinal cord are the body's headquarters, where every signal is sorted and every command begins. This week you learn the map: which part of the brain sees, which part hears, which part moves you, and which part keeps you breathing. You meet the meninges (three wrappings that protect the brain and spinal cord) and the clear fluid that cushions them. You finish with the reflex arc (the short, fixed path a fast, automatic response takes), the reason your hand leaves a hot pan before you feel the burn. Once you know where each job lives, you can predict what goes wrong when one place is hurt.
- Already covered: Week 1 gave you the control center; Week 12, the neuron.
- This week: the lobes, the deep regions, the meninges and fluid, and the reflex arc.
- How they connect: one neuron becomes a map of regions.
- Where we're going next: Week 14, The Peripheral & Autonomic Nervous System.
Focus
Where does each job live in the brain and spinal cord, and how does a reflex beat a decision?
By the end of this module, you should be able to:
- [ ] give each lobe of the cerebrum its job
- [ ] tell the thalamus from the hypothalamus
- [ ] order the meninges and the reflex arc
To-do
Plan your week
- Read Chapter 13 (about 50 minutes), then the lecture and slides.
- Work the tutorial (60–90 minutes) and practice set (20 minutes).
- Do the A&P Lab & Inquiry (two hours), the discussion, and the assignment.
- Take the quiz.
This week's checkpoint: name the lobe that sees and the lobe that hears.
You've got this
Ask your instructor early if you get stuck.
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