Monday, September 8, 2008

How many lobes does the human cerebrum have?

A. Two
B. Four
C. Five
D. Six
E. Seven

(The answer appears as a comment to this post.)


Brian E. Moore, MD said...

I was surprised to find in Manter and Gatz’s Essentials of Clinical Neuroanatomy and Neurophysiology (7th edition, 1987) that the human brain has six lobes (answer "D"). I quote from page 10: “Figure 4 [similar to the picture I posted] depicts the structures that are located on the medial (midsagittal) surface of the brain… A part of the fifth lobe can now be seen on the cerebral cortex. This is the limbic lobe, a ring (or limbus) of cortical tissue consisting primarily of the paraterminal gyrus, the cingulate gyrus, and the parahippocampal gyrus, which is partially hidden by the brain stem. A sixth lobe, the insular lobe, cannot be seen in these figures. It is the cortical tissue that forms the floor of the deep lateral fissure, and can be seen only when the lips (opercula) of this fissure is separated.” Of course, this issue begs the question: what is the definition of a cerebral lobe? I suppose it has something to do with functionality; but if any reader cares to opine on this topic, I would appreciate hearing from you.

BRAVO said...

If you want we can develop one more extra. Still have reserve to do it. Remember? Optic nerve, hypo campus and cerebellum. Great!

Jati Gotti said...

Hey Brian. It's Khalilah from UMass!Question. I was reading about a study where they found that child abuse caused lobe damage. I have yet to find any articles that state that this damage could be reversed. Do you know anything about this topic?

Brian E. Moore, MD said...

Hi Khalilah! I don't know about that, but I will look it up and feature it as a future post. Stay tuned............