User profiles for R.T. Narayanan

Rajeevan Therpurakal Narayanan

Marie Sklodowska-Curie Fellow
Verified email at dpag.ox.ac.uk
Cited by 1715

[HTML][HTML] Cell type-specific structural organization of the six layers in rat barrel cortex

RT Narayanan, D Udvary… - Frontiers in neuroanatomy, 2017 - frontiersin.org
The cytoarchitectonic subdivision of the neocortex into six layers is often used to describe
the organization of the cortical circuitry, sensory-evoked signal flow or cortical functions. …

[HTML][HTML] Patterns of coupled theta activity in amygdala-hippocampal-prefrontal cortical circuits during fear extinction

J Lesting, RT Narayanan, C Kluge, S Sangha… - PloS one, 2011 - journals.plos.org
Signals related to fear memory and extinction are processed within brain pathways involving
the lateral amygdala (LA) for formation of aversive stimulus associations, the CA1 area of …

Dendritic and axonal architecture of individual pyramidal neurons across layers of adult human neocortex

…, ZSRM Boudewijns, RT Narayanan… - Cerebral …, 2015 - academic.oup.com
The size and shape of dendrites and axons are strong determinants of neuronal information
processing. Our knowledge on neuronal structure and function is primarily based on brains …

Theta activity in neurons and networks of the amygdala related to long‐term fear memory

HC Pape, RT Narayanan, J Smid, O Stork… - …, 2005 - Wiley Online Library
With a combined in vitro/in vivo electrophysiological and behavioral approach, we have
correlated conditioned fear behavior to electrophysiological activities in the lateral amygdala …

Beyond columnar organization: cell type-and target layer-specific principles of horizontal axon projection patterns in rat vibrissal cortex

RT Narayanan, R Egger, AS Johnson… - Cerebral …, 2015 - academic.oup.com
Vertical thalamocortical afferents give rise to the elementary functional units of sensory
cortex, cortical columns. Principles that underlie communication between columns remain …

Dissociated theta phase synchronization in amygdalo‐hippocampal circuits during various stages of fear memory

RT Narayanan, T Seidenbecher… - European Journal of …, 2007 - Wiley Online Library
… is unlikely because reconsolidation experiments after recall of remote memory resulted in
a reinstatement of freezing-related theta synchronization (RT Narayanan, O. Stork and H.-C. …

Critical role of the 65-kDa isoform of glutamic acid decarboxylase in consolidation and generalization of Pavlovian fear memory

…, S Sangha, RT Narayanan… - Learning & …, 2008 - learnmem.cshlp.org
Evidence suggests that plasticity of the amygdalar and hippocampal GABAergic system is
critical for fear memory formation. In this study we investigated in wild-type and genetically …

Deficiency of the 65 kDa isoform of glutamic acid decarboxylase impairs extinction of cued but not contextual fear memory

S Sangha, RT Narayanan… - Journal of …, 2009 - Soc Neuroscience
Extinction procedures are clinically relevant for reducing pathological fear, and the mechanisms
of fear regulation are a subject of intense research. The amygdala, hippocampus, and …

EM connectomics reveals axonal target variation in a sequence-generating network

J Kornfeld, SE Benezra, RT Narayanan, F Svara… - Elife, 2017 - elifesciences.org
10.7554/eLife.24364.001 The sequential activation of neurons has been observed in various
areas of the brain, but in no case is the underlying network structure well understood. Here …

[PDF][PDF] Cortical output is gated by horizontally projecting neurons in the deep layers

R Egger, RT Narayanan, JM Guest, A Bast, D Udvary… - Neuron, 2020 - cell.com
Pyramidal tract neurons (PTs) represent the major output cell type of the mammalian neocortex.
Here, we report the origins of the PTs' ability to respond to a broad range of stimuli with …