Navigation Links
Schizophrenia: It's in the wiring of the brain

Philadelphia, PA, September 16, 2013 Just as wires must be insulated to effectively carry electrical impulses, nerve cells must be insulated by myelin to effectively transmit neural impulses. Using typical magnetic resonance imaging or MRI, one can visually distinguish parts of the brain that look white and parts that look gray. Myelin is most prevalent in the white matter because this component of the brain tissue is principally comprised by the nerve cell projections (axons) that are covered by myelin and that transmit information from one part of the brain to another.

In a new paper in Biological Psychiatry, Fei Du and colleagues at Harvard Medical School combined two types of brain imaging to characterize abnormalities in the white matter in schizophrenia.

One type of imaging, called magnetic resonance spectroscopy, measures the levels of particular chemicals in the brain. Another approach, called magnetization transfer imaging, is sensitive to changes in the level of myelin in the white matter.

"The notion that the brain in schizophrenia is characterized by abnormalities in connections between distant brain regions is not new, and imaging studies using diffusion tensor imaging have long suggested that the white matter where these connections travel is abnormal in this condition," explained senior author Dr. Dost ngr. "However, we have not had the tools to determine whether the abnormalities are in axons, or the myelin sheath around the axons, or both."

The researchers found evidence for abnormalities in both myelin and axons among patients with schizophrenia, when compared with healthy individuals who underwent the same testing. More specifically, they found reduced myelination of white matter pathways in schizophrenia, and also abnormal diffusion of N-acetylaspartate, a metabolite thought to be predominately localized within nerve cells.

This pattern of results is indicative of abnormalities in information processing and cognitive deficits, which is consistent with what scientists already know about how the brain is impacted by schizophrenia and the symptoms associated with this disorder.

"This study provides new evidence that myelination abnormalities in schizophrenia are associated with disturbances in the functional integrity of the white matter. As the white matter carries long range communication in the brain, the current findings raise new questions about the functional impact and treatment for these neural deficits," said Dr. John Krystal, Editor of Biological Psychiatry.

These findings are important because they suggest that "the white matter abnormalities in schizophrenia are complex and interconnected", added ngr. "A strategy to impact both axonal health and myelin synthesis may be needed to restore normal white matter functioning in this condition."

Such a strategy to restore abnormal functioning is not likely in the near future, but advances provided by this study and others like it help bring scientists ever closer to that ultimate goal.


Contact: Rhiannon Bugno

Related biology news :

1. Wiring the ocean
2. Wiring bats for neuroscience research
3. Multiple sclerosis appears to originate in different part of brain than long believed
4. Lab-on-a-chip tech, brain mapping & microbiome highlighted at translational med meeting
5. New Brain Supplement Focus Boost Launches, Boosting Alertness, Memory and Focus
6. Finally mapped: The brain region that distinguishes bits from bounty
7. What is the brain telling us about the diagnoses of schizophrenia and bipolar disorder?
8. Discovery helps to unlock brains speech-learning mechanism
9. Learning a new language alters brain development
10. Human brains are hardwired for empathy, friendship, study shows
11. Playing video games can boost brain power
Post Your Comments:
(Date:10/29/2015)... Va. , Oct. 29, 2015 Daon, ... today that it has released a new version of ... customers in North America have ... IdentityX v4.0 also includes a FIDO UAF certified ... are already preparing to activate FIDO features. These customers ...
(Date:10/29/2015)... October 29, 2015 NXTD ... company focused on the growing mobile commerce market ... that StackCommerce, a leading marketplace to discover and ... Wocket® smart wallet on StackSocial for this holiday ... or the "Company"), a biometric authentication company focused ...
(Date:10/27/2015)... 2015 Munich, Germany ... technology (ASGM) automatically maps data from mobile eye tracking ... , so that they can be quantitatively analyzed with ... Munich, Germany , October 28-29, 2015. SMI,s Automated ... mobile eye tracking videos created with SMI,s Eye ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... 25, 2015 Orexigen® Therapeutics, Inc. (Nasdaq: ... a fireside chat discussion at the Piper Jaffray 27th ... . The discussion is scheduled for Wednesday, December 2, ... .  A replay will be available for 14 days ... , Julie NormartVP, Corporate Communications and Business Development , ...
(Date:11/24/2015)... N.J. (PRWEB) , ... November 24, 2015 , ... The ... the recipient of the 2016 USGA Green Section Award. Presented annually since 1961, the ... through his or her work with turfgrass. , Clarke, of Iselin, N.J., ...
(Date:11/24/2015)... ... November 24, 2015 , ... Copper is an ... is bound to proteins, copper is also toxic to cells. With a $1.3 ... Institute (WPI) will conduct a systematic study of copper in the bacteria Pseudomonas ...
(Date:11/24/2015)... 2015 --> ... "Oligonucleotide Synthesis Market by Product & Services (Primer, Probe, ... DNA, RNAi), End-User (Research, Pharmaceutical & Biotech, Diagnostic Labs) ... market is expected to reach USD 1,918.6 Million by ... CAGR of 10.1% during the forecast period. ...
Breaking Biology Technology: