Hey can somebody help me with this please? Thanks in advance! </p>
How can researchers show that language is usually in the left hemisphere of a split-brain patient? </p>
Also, wehn testing split brain patients, why must you have specialized equipment and procedures? (Why is cross hair used?)</p>
The first one: If you take a person who has separate hemispheres (i.e. no corpus collosum) and have them stare at a crosshair and flash a word on the right side of a screen, they should be able to tell you what it is (because vision in right eye goes to the left hemisphere). </p>
Do check your book; this wasn’t my strongest section (but this is what I remember).</p>
Isn’t it that if you ask them what word they see, they will say the word on the right, but if you ask them to point to the one they see, they will point to the one on the left?</p>
What is a crosshair?!</p>
A crosshair is like a little cross in the middle of a screen.</p>
And FutureVpFinance, that’s exactly what it is. I just couldn’t describe it as well as you.</p>
Why would you want a crosshair?</p>
So that you keep the eyes isolated. If you have both eyes looking at the right side of the screen, your experiment is worthless.</p>
I believe the first reply was correct. You have to ask the patient to focus on a crosshair so you can set up that experiment to only test certain eyes. If they looked at the right side exclusively, the experiment would be worthless. Then, you have to flash a word on the right side of the screen. Since the right eye routes to the left side of the brain, if you ask them what they saw on the right side, they would be able to tell you the word. However, if you do just the opposite, and flash something on the left side of the screen, they shouldn’t be able to tell you what happened on the left side, because if it goes to the right side, and the right side doesn’t process language, and the fact that there is no bridge, they wouldn’t be able to comprehend it.</p>
I think that if you flash it on the left side of the screen, the person should be able to draw the word or write it out and can say the word after looking at what he drew/wrote. Something like that…</p>
^^Unless they can see the word with their right eye, they wont be able to say it.</p>