Publication Date:
2004-05-01
Description:
The functional and anatomical rearrangements of cortical sensory maps accompanying changes in experience are not well understood. We examined in vivo and in vitro how the sensory map and underlying synaptic connectivity of the developing rat barrel cortex are altered when the sensory input to the cortex is partially deprived. In the nondeprived cortex, both the sensory responses and synaptic connectivity between columns were strengthened through an increase in the synaptic connection probability between L2/3 pyramids in adjacent columns. This was accompanied by a selective growth of L2/3pyramid axonal arbors between spared columns. In contrast, deprived and nondeprived cortical columns became weakly connected in their L2/3 pyramid connections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petersen, Carl C H -- Brecht, Michael -- Hahn, Thomas T G -- Sakmann, Bert -- New York, N.Y. -- Science. 2004 Apr 30;304(5671):739-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Physiology, Max-Planck-Institute for Medical Research, Jahnstrasse 29, Heidelberg D-69120, Germany. carl.petersen@epfl.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15118164" target="_blank"〉PubMed〈/a〉
Keywords:
Action Potentials
;
Animals
;
Brain Mapping
;
Electric Stimulation
;
Excitatory Postsynaptic Potentials
;
Image Processing, Computer-Assisted
;
In Vitro Techniques
;
Nerve Net/physiology
;
*Neuronal Plasticity
;
Patch-Clamp Techniques
;
Pyramidal Cells/*physiology/ultrastructure
;
Rats
;
Rats, Wistar
;
Somatosensory Cortex/cytology/growth & development/*physiology
;
Synapses/*physiology
;
Synaptic Transmission
;
Vibrissae/*physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink
