Now showing items 1-17 of 17

    • A polyaxonal amacrine cell population in the primate retina. 

      Field, Greg; Greschner, Martin; Li, Peter H; Schiff, Max L; Gauthier, Jeffrey L; Ahn, Daniel; Sher, Alexander; ... (9 authors) (The Journal of neuroscience : the official journal of the Society for Neuroscience, 2014-03)
      Amacrine cells are the most diverse and least understood cell class in the retina. Polyaxonal amacrine cells (PACs) are a unique subset identified by multiple long axonal processes. To explore their functional properties, ...
    • Advances in color science: from retina to behavior. 

      Johnson, Elizabeth; Field, Greg; Conway, Bevil R; Chatterjee, Soumya; Horwitz, Gregory D; Koida, Kowa; Mancuso, Katherine (The Journal of neuroscience : the official journal of the Society for Neuroscience, 2010-11)
      Color has become a premier model system for understanding how information is processed by neural circuits, and for investigating the relationships among genes, neural circuits, and perception. Both the physical stimulus ...
    • Brain circuits for the internal monitoring of movements. 

      Sommer, Marc A; Wurtz, RH (Annu Rev Neurosci, 2008)
      Each movement we make activates our own sensory receptors, thus causing a problem for the brain: the spurious, movement-related sensations must be discriminated from the sensory inputs that really matter, those representing ...
    • Composition and topographic organization of signals sent from the frontal eye field to the superior colliculus. 

      Sommer, Marc A; Wurtz, RH (J Neurophysiol, 2000-04)
      The frontal eye field (FEF) and superior colliculus (SC) contribute to saccadic eye movement generation, and much of the FEF's oculomotor influence may be mediated through the SC. The present study examined the composition ...
    • Correlated firing among major ganglion cell types in primate retina. 

      Field, Greg; Greschner, Martin; Shlens, Jonathon; Bakolitsa, Constantina; Gauthier, Jeffrey L; Jepson, Lauren H; Sher, Alexander; ... (9 authors) (The Journal of physiology, 2011-01)
      Retinal ganglion cells exhibit substantial correlated firing: a tendency to fire nearly synchronously at rates different from those expected by chance. These correlations suggest that network interactions significantly shape ...
    • Division of labor in frontal eye field neurons during presaccadic remapping of visual receptive fields. 

      Shin, S; Sommer, Marc A (J Neurophysiol, 2012-10)
      Our percept of visual stability across saccadic eye movements may be mediated by presaccadic remapping. Just before a saccade, neurons that remap become visually responsive at a future field (FF), which anticipates the saccade ...
    • Drivers from the deep: the contribution of collicular input to thalamocortical processing. 

      Cavanaugh, J; Sommer, Marc A; Wurtz, RH (Prog Brain Res, 2005)
      A traditional view of the thalamus is that it is a relay station which receives sensory input and conveys this information to cortex. This sensory input determines most of the properties of first order thalamic neurons, ...
    • Frontal eye field neurons orthodromically activated from the superior colliculus. 

      Sommer, Marc A; Wurtz, RH (J Neurophysiol, 1998-12)
      Frontal eye field neurons orthodromically activated from the superior colliculus. J. Neurophysiol. 80: 3331-3333, 1998. Anatomical studies have shown that the frontal eye field (FEF) and superior colliculus (SC) of monkeys ...
    • Frontal eye field neurons with spatial representations predicted by their subcortical input. 

      Crapse, Trinity; Sommer, Marc A (J Neurosci, 2009-04-22)
      The frontal eye field (FEF) is a cortical structure involved in cognitive aspects of eye movement control. Neurons in the FEF, as in most of cerebral cortex, primarily represent contralateral space. They fire for visual ...
    • High-sensitivity rod photoreceptor input to the blue-yellow color opponent pathway in macaque retina. 

      Chichilnisky, EJ; Field, Greg; Gauthier, JL; Greschner, M; Litke, Alan M; Marshak, DW; Rangel, C; ... (9 authors) (Nat Neurosci, 2009-09)
      Small bistratified cells (SBCs) in the primate retina carry a major blue-yellow opponent signal to the brain. We found that SBCs also carry signals from rod photoreceptors, with the same sign as S cone input. SBCs exhibited ...
    • Identification of a Retinal Circuit for Recurrent Suppression Using Indirect Electrical Imaging. 

      Field, Greg; Greschner, Martin; Heitman, Alexander K; Li, Peter H; Ahn, Daniel; Sher, Alexander; Litke, Alan M; ... (8 authors) (Current biology : CB, 2016-08)
      Understanding the function of modulatory interneuron networks is a major challenge, because such networks typically operate over long spatial scales and involve many neurons of different types. Here, we use an indirect electrical ...
    • Rapid modulation of sensory processing induced by stimulus conflict. 

      Appelbaum, Lawrence Gregory; Boehler, CN; Chen, WD; Smith, DV; Woldorff, Marty G (J Cogn Neurosci, 2011-09)
      Humans are constantly confronted with environmental stimuli that conflict with task goals and can interfere with successful behavior. Prevailing theories propose the existence of cognitive control mechanisms that can suppress ...
    • Retinal representation of the elementary visual signal. 

      Field, Greg; Li, Peter H; Greschner, Martin; Ahn, Daniel; Gunning, Deborah E; Mathieson, Keith; Sher, Alexander; ... (9 authors) (Neuron, 2014-01)
      The propagation of visual signals from individual cone photoreceptors through parallel neural circuits was examined in the primate retina. Targeted stimulation of individual cones was combined with simultaneous recording ...
    • Spatial and temporal scales of neuronal correlation in visual area V4. 

      Smith, MA; Sommer, Marc A (J Neurosci, 2013-03-20)
      The spiking activity of nearby cortical neurons is correlated on both short and long time scales. Understanding this shared variability in firing patterns is critical for appreciating the representation of sensory stimuli ...
    • Visual perception and corollary discharge. 

      Sommer, Marc A; Wurtz, RH (Perception, 2008)
      Perception depends not only on sensory input but also on the state of the brain receiving that input. A classic example is perception of a stable visual world in spite of the saccadic eye movements that shift the images ...
    • What the brain stem tells the frontal cortex. I. Oculomotor signals sent from superior colliculus to frontal eye field via mediodorsal thalamus. 

      Sommer, Marc A; Wurtz, RH (J Neurophysiol, 2004-03)
      Neuronal processing in cerebral cortex and signal transmission from cortex to brain stem have been studied extensively, but little is known about the numerous feedback pathways that ascend from brain stem to cortex. In this ...
    • What the brain stem tells the frontal cortex. II. Role of the SC-MD-FEF pathway in corollary discharge. 

      Sommer, Marc A; Wurtz, RH (J Neurophysiol, 2004-03)
      One way we keep track of our movements is by monitoring corollary discharges or internal copies of movement commands. This study tested a hypothesis that the pathway from superior colliculus (SC) to mediodorsal thalamus ...