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Coherent spatiotemporal patterns of ongoing activity revealed by real-time optical imaging coupled with single-unit recording in the cat visual cortex.
Arieli A, Shoham D, Hildesheim R, Grinvald A. Arieli A, et al. J Neurophysiol. 1995 May;73(5):2072-93. doi: 10.1152/jn.1995.73.5.2072. J Neurophysiol. 1995. PMID: 7623099
In 88% of the neurons recorded during spontaneous activity, a significant correlation was found between the occurrence of a spike and the optical signal recorded in a large cortical region surrounding the recording site. This result indicates that spontaneous …
In 88% of the neurons recorded during spontaneous activity, a significant correlation was found between the occurrence of a sp …
Spatiotemporal dynamics of sensory responses in layer 2/3 of rat barrel cortex measured in vivo by voltage-sensitive dye imaging combined with whole-cell voltage recordings and neuron reconstructions.
Petersen CC, Grinvald A, Sakmann B. Petersen CC, et al. J Neurosci. 2003 Feb 15;23(4):1298-309. doi: 10.1523/JNEUROSCI.23-04-01298.2003. J Neurosci. 2003. PMID: 12598618 Free PMC article.
It was restricted horizontally to the size of a single barrel-column coextensive with the dendritic arbor of barrel-column-related pyramids in L2/3. ...Thus the subthreshold cortical map representing a whisker deflection is dynamic on the millisecond time scale and …
It was restricted horizontally to the size of a single barrel-column coextensive with the dendritic arbor of barrel-column-related py …
Imaging spatiotemporal dynamics of surround inhibition in the barrels somatosensory cortex.
Derdikman D, Hildesheim R, Ahissar E, Arieli A, Grinvald A. Derdikman D, et al. J Neurosci. 2003 Apr 15;23(8):3100-5. doi: 10.1523/JNEUROSCI.23-08-03100.2003. J Neurosci. 2003. PMID: 12716915 Free PMC article.
We found that the motion of a single whisker evoked a cortical response exhibiting either one or three phases. During a triphasic response, there was first a cortical depolarization in a small cortical region the size of a single cortical …
We found that the motion of a single whisker evoked a cortical response exhibiting either one or three phases. During a
Arousal increases the representational capacity of cortical tissue.
Fekete T, Pitowsky I, Grinvald A, Omer DB. Fekete T, et al. J Comput Neurosci. 2009 Oct;27(2):211-27. doi: 10.1007/s10827-009-0138-6. Epub 2009 Mar 27. J Comput Neurosci. 2009. PMID: 19326198
We argue that representational capacity is of a dual nature-it requires not only that cortical tissue generate complex activity (i.e. spatiotemporal neuronal events), but also a complex cortical activity space (which is comprised of such spatiotemporal events). ...M …
We argue that representational capacity is of a dual nature-it requires not only that cortical tissue generate complex activity (i.e. …
Removal of spatial biological artifacts in functional maps by local similarity minimization.
Fekete T, Omer DB, Naaman S, Grinvald A. Fekete T, et al. J Neurosci Methods. 2009 Mar 30;178(1):31-9. doi: 10.1016/j.jneumeth.2008.11.020. Epub 2008 Dec 3. J Neurosci Methods. 2009. PMID: 19101591
Here we propose a simple algorithm that efficiently removes spatial biological artifacts contaminating high-resolution functional maps. ...To remove vascular spatial patterns we first constructed a template of typical artifacts (vascular/cardiac pulsation/vasomotion …
Here we propose a simple algorithm that efficiently removes spatial biological artifacts contaminating high-resolution functional map …
Cortical response field dynamics in cat visual cortex.
Sharon D, Jancke D, Chavane F, Na'aman S, Grinvald A. Sharon D, et al. Cereb Cortex. 2007 Dec;17(12):2866-77. doi: 10.1093/cercor/bhm019. Epub 2007 Mar 29. Cereb Cortex. 2007. PMID: 17395608
We found that the cortical response field was often characterized by a plateau of activity, beyond the rim of which activity diminished quickly. ...Thus, alongside selective amplification of a spatially restricted suprathreshold response, wider activation to just be …
We found that the cortical response field was often characterized by a plateau of activity, beyond the rim of which activity diminish …
Compartment-resolved imaging of activity-dependent dynamics of cortical blood volume and oximetry.
Vanzetta I, Hildesheim R, Grinvald A. Vanzetta I, et al. J Neurosci. 2005 Mar 2;25(9):2233-44. doi: 10.1523/JNEUROSCI.3032-04.2005. J Neurosci. 2005. PMID: 15745949 Free PMC article.
To avoid the confounding effects of hematocrit and oximetry changes, we developed and used a new fluorescent blood plasma tracer and combined these measurements with optical imaging of intrinsic signals at a near-isosbestic wavelength for hemoglobin (565 nm). ...Inf …
To avoid the confounding effects of hematocrit and oximetry changes, we developed and used a new fluorescent blood plasma tracer and …
Retinotopic axis specificity and selective clustering of feedback projections from V2 to V1 in the owl monkey.
Shmuel A, Korman M, Sterkin A, Harel M, Ullman S, Malach R, Grinvald A. Shmuel A, et al. J Neurosci. 2005 Feb 23;25(8):2117-31. doi: 10.1523/JNEUROSCI.4137-04.2005. J Neurosci. 2005. PMID: 15728852 Free PMC article.
The major axis of anisotropy was systematically parallel to a retinotopic axis in V1 corresponding to the preferred orientation of the cells of origin in V2. We conclude that the feedback connections from V2 to V1 might play a role in enhancing the response in V1 to …
The major axis of anisotropy was systematically parallel to a retinotopic axis in V1 corresponding to the preferred orientation of th …
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