HOME >> BIOLOGY >> NEWS
Good connections are everything

This release is also available in German

The biosphere contains many scale-free networks. Prominent examples are provided by the functional networks within the human brain. Scientists at the Max Planck Institute of Colloids and Interfaces have discovered that activity patterns in such biomimetic networks have unusual dynamic properties, which are controlled by a few, highly connected nodes. As a result, ordered activity patterns are very robust against random perturbations but rather sensitive to selective perturbations. Disordered patterns, on the other hand, decay very fast and relax towards an ordered pattern even if the network becomes infinitely large. In addition, these scale-free networks can also be used to store and retrieve a large number of fixed patterns (PNAS, Advanced Online Publication, 8 July 2005).

The human brain consists of about 100 billion nerve cells or neurons that are interconnected to form a huge network. Each neuron can be active by producing an action potential. If we were able to make a snapshot of the whole neural network, we would see, at any moment in time, a certain pattern of active and inactive neurons. If we combined many such snapshots into a movie, we would find that this activity pattern changes continuously with time, (see Figure 1). This pattern evolution represents the global dynamics of the neural network. At present, one cannot observe such activity patterns on the level of single neurons, but modern imaging techniques enable us to monitor coarse-grained patterns with a reduced spatial resolution. Using functional magnetic resonance imaging, for example, scientists can obtain activity patterns of about 100,000 neuron clusters, each of which contains about one million neurons.

The neuron clusters form another, coarse-grained network. Each cluster corresponds to a node of this network, and each node can be characterized
'"/>

Contact: Prof. Dr. Reinhard Lipowsky
reinhard.lipowsky@mpikg.mpg.de
49-331-567-9600
Max-Planck-Gesellschaft
12-Jul-2005


Page: 1 2 3

Related biology news :

1. Strength of connections between brain regions may affect an adolescents response to peer influence
2. New role for sugars: Research shows connections between sugar modifications in cells and cancer
3. Nerve fibers need specific growth factor chemical to form connections within the brain
4. On the track of tiny larvae, a new model elucidates connections in marine ecology
5. Long-term changes in experience cause neurons to sprout new long-lasting connections
6. Protein connections: A network to understand disease
7. Carnegie Mellon study identifies impact of neural connections in learning process
8. New study identifies key gene in development of connections between brain and spinal cord
9. Media alert: Special sessions feature Utahs military, agriculture connections
10. Sensory deprivation affects brains nerve connections
11. Mapping neuron connections in the brain

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/27/2021)... ... March 25, 2021 , ... Phlexglobal announced ... Planet Group, has selected Phlexglobal and its innovative regulatory SaaS software, PhlexSubmission, as ... a comprehensive review of five regulatory software companies, with the review team including ...
(Date:3/27/2021)... ... 25, 2021 , ... The 2021 Virtual Conference on Clinical Trial Supply-Europe ... More and more, clinical trial supply conferences are featuring speakers and forums that ... Asymmetrex’s founder and CEO, James L. Sherley, M.D., Ph.D., presented a talk ...
(Date:3/23/2021)... ... March 23, 2021 , ... G-CON Manufacturing (G-CON), the ... by Matica Biotechnology (Matica Bio), a contract development and manufacturing organization (CDMO) specializing ... the cleanroom build out for its new GMP production facility in College Station, ...
Breaking Biology News(10 mins):
(Date:3/27/2021)... ... March 24, 2021 , ... ... Life Sciences and Healthcare firms of all sizes, adds depth to its team ... specialist. Pardillo, who earned his doctorate in computational chemistry from Florida International University ...
(Date:3/27/2021)... ... March 24, 2021 , ... ABI Wellness, ... and reporting approach designed under CEO Mark Watson, today announced a webinar dedicated ... featuring guest speakers Dr. Cameron Clark, Neuropsychologist and Founder of Sharp Thinking, and ...
(Date:3/27/2021)... ... ... The Xtalks editorial team is pleased to announce the launch of the ... joined by editorial team members Ayesha Rashid, Sydney Perelmutter and Mira Nabulsi to discuss ... including insights from industry experts. , The Xtalks Life Science podcast will feature ...
(Date:3/23/2021)... Conn. (PRWEB) , ... March 23, 2021 , ... ... develops solutions for characterizing microbiome populations down to the strain level, recently unveiled ... applications. , Not all microbes are created equal: some are easy to ...
Breaking Biology Technology:
Cached News: