Navigation Links
Which side of the brain rotates a mental picture?
Date:3/9/2011

Milan, Italy, 9 March 2011 Consider the simple situation in which you are walking around the kitchen and decide to pick up your own cup of tea, which is identical to others lying on the table. Your brain chooses the correct cup of tea by using different types of information that you have stored about the position of the cup in relation to the kitchen table. The information can be represented in qualitative terms (left, right, above, below) or quantitative terms (distances and angles). Previous studies have claimed that the brain's left hemisphere is critical for processing qualitative (technically 'categorical'), information and the right for quantitative ('metric') processing. However, new neuropsychological findings published in the February 2011 issue of Cortex (http://www.sciencedirect.com/science/journal/00109452) show that this is not the case.

A multidisciplinary team led by cognitive neuroscientist Tim Shallice and neurosurgeon Miran Skrap working in Udine, Italy, studied the difficulties faced by 55 patients who had recently had an operation to remove a brain tumour from either the left or right side of the brain. The patients were shown a series of images of a dot inside an upright or tilted frame and were asked to reproduce its position inside an identical upright frame, a task requiring mental rotation of the image.

The team found that patients whose tumours had been in the right parietal or in the left prefrontal cortices made a considerably larger number of errors than other patients. Moreover, these two critical groups behaved rather differently from each other. The right parietal patients placed the mark in the right position with respect to a corner. However, they chose the wrong corner much more often that the other patients. The left prefrontal patients got the corner right but were otherwise highly inaccurate in their responses. It was therefore the patients with tumours of the right parietal cortex who were unable to process the categorical spatial information and perform the mental rotation. A left prefrontal tumour instead led to difficulties in the setting up of the specific program within the brain which was necessary to organize the sequence of operations required to carry out the task.


'/>"/>

Contact: Laura Fabri
l.fabri@elsevier.com
39-028-818-4353
Elsevier
Source:Eurekalert

Related medicine news :

1. Rate Regulation for Health Insurance: Obama Administration Should Look to CAs Model Law Which Has Saved Drivers $62 Billion Since 1988
2. Chest X-rays Can Help Predict Which H1N1 Patients Are at Greatest Risk
3. Chest X-rays can help predict which H1N1 patients are at greatest risk
4. New approach which can help to predict neurodegenerative diseases
5. Study identifies factors which predict alcohol use after liver transplantation
6. Researchers identify gene set that shows which patients benefit from chemo after surgery
7. Right or left? Brain stimulation can change which hand you favor
8. Video May Help Predict Which Embryos Will Survive IVF
9. Which comes first: Exercise-induced asthma or obesity?
10. Tomatoes found to contain nutrient which prevents vascular diseases
11. Gene test shows which bladder cancer patients may have cancer spread
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/30/2020)... ... May 29, 2020 , ... Segal Trials, ... conducting Phase I-IV trials, commemorated May, Mental Health Awareness Month, and May 20th, ... possible. , Efforts include their #StayConnected video series raising awareness of clinical ...
(Date:5/28/2020)... ... May 28, 2020 , ... Today the ... Shield protection. Donors can now be reimbursed for lost wages and travel/lodging costs ... six Donor Shield protections include lost wage reimbursement for donation, travel & lodging ...
(Date:5/27/2020)... ... 27, 2020 , ... Radiology Associates of Richmond (RAR), one ... aligned with the Strategic Radiology (SR) coalition of independent practices. , RAR ... coalition, which has 28 member practices in 20 different states. The Richmond practice ...
(Date:5/26/2020)... ... May 26, 2020 , ... Today TRC Companies (“ TRC ”) announced ... that will help business owners and leaders assess whether their organizations are prepared to ... offering from TRC is intended to assist business leaders evaluate their readiness relative to ...
(Date:5/21/2020)... Va. (PRWEB) , ... May ... ... An Interactive Companion to the CRC’s Guide to Coordinating Clinical Research, CenterWatch ... of clinical research management, The CRC Trainer: An Interactive Companion to the ...
Breaking Medicine News(10 mins):
(Date:5/30/2020)... ... , ... During a crisis, the platitude “stay strong” is well-intended, but difficult ... and strengthened through hardship. Recent research conducted by PsychTests.com reveals that mentally ... order to stay strong in the face of adversity. It seems that resilience isn’t ...
(Date:5/28/2020)... ... ... When Sean Fitzgerald was in business leadership for a national in-home care franchise, he ... needed to keep older adults in their homes, but it was hard to find ... in a position to help provide those property maintenance and repair services as the ...
(Date:5/28/2020)... ... May 28, 2020 , ... May is Talking is Power Month, a national ... care about them. The focus of Power to Decide’s #TalkingIsPower campaign reminds parents, trusted ... Power to Decide’s Mackenzie Piper, MPH, CHES, provides five strategies parents, trusted adults and ...
Breaking Medicine Technology: