General Question

sevenfourteen's avatar

Does anyone know a quality website to find Broadmann's areas?

Asked by sevenfourteen (2422points) September 30th, 2009

I have a chart for neuroanatomy with various broadmann’s areas on it and we are supposed to list their common name, location, function, and effect of a lesion. The problem is, my book only mentions certain ones and I can’t seem to find anything online.

More specifically I need the following:
– effect of a lesion for: 5/7, 9/10/11/12, 17, 18/19, 43, 46
– function of 37
-name, location, function, effect of a lesion of 38

I know where all the areas ARE and what their functions are so would a lesion just create a poor version of the function? ex- area 43 is for taste, would a lesion be the inability to distinguish taste or is there a name for that?

Observing members: 0 Composing members: 0

4 Answers

nikipedia's avatar

You are basically correct. In theory, if you lesion an area for taste, you should stop being able to taste stuff. A lot of the lesions you mentioned produce agnosias of one kind or another, but taste is an exception. Damages to gustation are - geusias. So to have a loss of taste, you stick on the prefix a- and get ageusia.

I say that you are basically correct because as you probably know, the brain is infinitely more complicated than that. Many cognitive processes have degenerate systems so that if one is damaged, another can take over and make up the difference. For the purposes of your class, however, it sounds like your instructor just wants you to assume that damage to the region in question will cause a loss of function.

If you have more specific questions post back. I would be happy to help as much as possible (without doing your homework for you!)

Also, this is one case in science in which spelling counts: you will probably have a lot more luck if you search for Brodmann areas rather than Broadmann.

sevenfourteen's avatar

Thanks!! whoops on the spelling, maybe that’s a good place to start studying I filled out my chart minus all the lesions (which no one else had either) so instead of him telling us what they were he just said it was incomplete. I don’t care about that grade now but we have a test coming up and no one seems to be able to give me insight to the lesions. I suppose just the opposite of the function will have to do.

nikipedia's avatar

I would guess what your instructor is trying to get you to do is use the lesion thing to go a little bit more in depth about function. For instance, take a look at this quote from the wikipedia page on area 46:

The DLPFC plays a role in sustaining attention and working memory. Lesions to the DLPFC impair short-term memory and cause difficulty inhibiting responses. Lesions may also eliminate much of the ability to make judgements about what’s relevant and what’s not as well as causing problems in organisation.

So you would have been technically correct if you said “people with damage to area 46/dorsolateral prefrontal cortex are unable to sustain attention or use their working memory,” but notice how the author here goes a step beyond that and gives a far more complete answer.

I bet you could find a lot of interesting things to give you this level of detail about lesions by googling around, either on normal google or google scholar.

nikipedia's avatar

I just re-read your question and noticed that you had some more specific questions that I didn’t get to.

Regarding the function of area 37: this area roughly corresponds with the fusiform gyrus—if you look that up, you should have a much easier time figuring out its function. Lesions here produce one of the MOST INTERESTING AGNOSIAS EVER!

For area 38, I had to turn to google scholar and I found this article. You should be able to access the full text if you’re on a university campus with a subscription to the journal, but if you can’t send me message with your email address and I’ll send you a pdf of it.

Answer this question

Login

or

Join

to answer.

This question is in the General Section. Responses must be helpful and on-topic.

Your answer will be saved while you login or join.

Have a question? Ask Fluther!

What do you know more about?
or
Knowledge Networking @ Fluther