a. What is the advantage of having a cerebrum that is highly convoluted? b. What term is used to indicate its grooves? Its outward folds? c. Which groove divides the cerebrum into two hemispheres? d. What divides the parietal from the frontal lobe? The parietal from the temporal lobe?

Video transcript

Hi, everybody. Let's look at our next question. It says the lateral circus separates which lobes of the cerebrum. A frontal and temporal b, parietal and temporal C, parietal parietal and occipital d, frontal and occipital E both A and B or F both C and D. So I'm going to put up just a really, really crude diagram of the lobes of the brain. And we're going to ignore the cerebellum because we're only talking about the cerebrum. So we have on the top, starting in the front, the frontal lobe, easy to remember behind it, the parietal lobe and then in the very, very back, lower down the occipital lobe tucked in between all these under the frontal parietal lobe in front of the occipital lobe is the temporal lobe and I've marked in red, there's a groove going above the temporal lobe and below the frontal and parietal lobes. And that groove is the lateral circus. And we can help to remember that lateral means side and you see the lateral circus when looking at the brain from a side view. So which lobes of the cerebrum does it separate? Well choice a frontal and temporal. It does separate those two frontal on top and temporal below B, parietal and temporal. It also separates those two C parietal occipital. It does not separate the occipitals in the back and is not separated by that particular circus. Then choice D frontal and occipital. Well, the frontal occipital lobes are separated by the parietal lobe, not by the lateral circus. So that's not correct. So we have our two correct answers A and B. So that means our final answer will be choice E both A and B and we can cross out choice f both C and D since those are incorrect. So again, our correct answer, the latter sulcus separates which of the lobes of the cerebrum. Choice A both A and B, the frontal and parietal being separated from the temporal lobe below. See you in the next video.