User profiles for Omar J. Ahmed

Omar J Ahmed

Associate Professor, University of Michigan
Verified email at umich.edu
Cited by 1557

Thalamic control of layer 1 circuits in prefrontal cortex

SJ Cruikshank, OJ Ahmed, TR Stevens… - Journal of …, 2012 - Soc Neuroscience
Knowledge of thalamocortical (TC) processing comes mainly from studying core thalamic
systems that project to middle layers of primary sensory cortices. However, most thalamic relay …

Running speed alters the frequency of hippocampal gamma oscillations

OJ Ahmed, MR Mehta - Journal of Neuroscience, 2012 - Soc Neuroscience
Successful spatial navigation is thought to employ a combination of at least two strategies:
the following of landmark cues and path integration. Path integration requires that the brain …

The hippocampal rate code: anatomy, physiology and theory

OJ Ahmed, MR Mehta - Trends in neurosciences, 2009 - cell.com
Since the days of Cajal, the CA1 pyramidal cell has arguably received more attention than
any other neuron in the mammalian brain. Hippocampal CA1 pyramidal cells fire spikes with …

Neuronal ensemble synchrony during human focal seizures

W Truccolo, OJ Ahmed, MT Harrison… - Journal of …, 2014 - Soc Neuroscience
Seizures are classically characterized as the expression of hypersynchronous neural activity,
yet the true degree of synchrony in neuronal spiking (action potentials) during human …

[PDF][PDF] Single neuron activity and theta modulation in postrhinal cortex during visual object discrimination

SC Furtak, OJ Ahmed, RD Burwell - Neuron, 2012 - cell.com
Postrhinal cortex, rodent homolog of the primate parahippocampal cortex, processes spatial
and contextual information. Our hypothesis of postrhinal function is that it serves to encode …

[HTML][HTML] Optogenetic Delay of Status Epilepticus Onset in an In Vivo Rodent Epilepsy Model

I Sukhotinsky, AM Chan, OJ Ahmed, VR Rao… - PloS one, 2013 - journals.plos.org
Epilepsy is a devastating disease, currently treated with medications, surgery or electrical
stimulation. None of these approaches is totally effective and our ability to control seizures …

Dynamics of propofol-induced loss of consciousness across primate neocortex

Y Ishizawa, OJ Ahmed, SR Patel, JT Gale… - Journal of …, 2016 - Soc Neuroscience
The precise neural mechanisms underlying transitions between consciousness and
anesthetic-induced unconsciousness remain unclear. Here, we studied intracortical neuronal …

Thalamus and claustrum control parallel layer 1 circuits in retrosplenial cortex

…, S Kailasa, SP Rice, SK Sudhakar, OJ Ahmed - Elife, 2021 - elifesciences.org
The granular retrosplenial cortex (RSG) is critical for both spatial and non-spatial behaviors,
but the underlying neural codes remain poorly understood. Here, we use optogenetic circuit …

[HTML][HTML] A biologically constrained, mathematical model of cortical wave propagation preceding seizure termination

LR González-Ramírez, OJ Ahmed… - PLoS computational …, 2015 - journals.plos.org
Epilepsy—the condition of recurrent, unprovoked seizures—manifests in brain voltage
activity with characteristic spatiotemporal patterns. These patterns include stereotyped semi-…

Ictal and preictal power changes outside of the seizure focus correlate with seizure generalization

JS Naftulin, OJ Ahmed, G Piantoni, JB Eichenlaub… - …, 2018 - Wiley Online Library
Objective The treatment of focal epilepsies is largely predicated on the concept that there is
a “focus” from which the seizure emanates. Yet, the physiological context that determines if …