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Research
Area:
Neurophysiology and Cognitive Neurosciences
My research aims at
understanding the physiology of cognition and behavior. My laboratory
focuses on investigating how the brain transforms visual signals into
coordinated motor behavior and how this process is influenced by attention.
We use a combination of techniques (electrophysiology, behavioral
measurements and brain imaging) in normal subjects and patients. We measure
electrical activity in different brain regions and eye movements during
visuomotor tasks while manipulating the behavioral relevance of the
different task components. The results of our research will contribute to
understand how the brain generates behavior and may contribute to the
understanding of neurological and psychiatric disorders in humans.
Education:
MD (Havana University, Cuba), Ph.D. (University of Tuebingen, Germany),
Postdoctoral training (York University, Canada)
Lennert T, Martinez-Trujillo JC.
Strength of response suppression to distracter stimuli determines the speed
and accuracy of attentional filtering by prefrontal neurons. Neuron
(in press).
Mendoza D, Schneiderman M, Kaul C, Martinez-Trujillo JC.
Working memory and feature-based attention simultaneously modulate the
perception of visual motion direction. Journal of Vision 11(1):11,
2011.
Niebergall R, Huang L, Martinez-Trujillo JC.
Similar perceptual costs for dividing attention between retina- and
space-centered targets in humans. Journal of Vision 10(12):4, 2010.
Khayat P, Niebergall R, Martinez-Trujillo JC.
Frequency-dependent attentional modulation od local field potential signals
in macaque area MT. The Journal of Neuroscience 30(20):7037-48, 2010.
Khayat P,
Niebergall R, Martinez-Trujillo JC.
Attention differentially modulates similar neuronal responses in area MT
evoked by varying contrast and direction stimuli. The Journal of
Neuroscience 30(6):2188-97, 2010.
Martinez-Trujillo JC, Cheyne D, Gaetz W, Simine E,
Tsotsos JK.
Activation of Area MT/V5 and the Right Inferior Parietal Cortex during the
Discrimination of Transient Direction Changes in Translational Motion.
Cerebral Cortex 17(7): 1733-39, 2007.
Martinez-Trujillo JC, Medendorp WP, Wang H, Crawford JD.
Frames of reference
for eye-head gaze commands in primate Supplementary Eye Fields. Neuron,
44(6):1057-66, 2004.
Martínez-Trujillo JC, Treue S.
Feature-based attention increases the
selectivity of population responses in primate visual cortex. Current
Biology 14 (9):744-751, 2004 .
Martínez-Trujillo JC, Treue S.
Attention changes apparent stimulus contrast
in primate visual cortex. Neuron, 35: 365-370, 2002.
Treue
S, Martínez-Trujillo JC.
Feature-based attention influences motion
processing gain in macaque visual cortex. Nature, 399, 575-579, 1999.
For a full list of publications, please click here
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