Doris Tsao

Last updated
Doris Tsao
Doris Tsao.jpg
Born
Citizenship American
Alma mater California Institute of Technology
Harvard University
Known for Face perception
Awards
Scientific career
Fields Neuroscience
Visual perception
Institutions University of California, Berkeley
Thesis Stereopsis  (2002)
Doctoral advisor Margaret Livingstone

Doris Ying Tsao is an American neuroscientist and professor of neurobiology and molecular cell biology at the University of California, Berkeley. She was formerly on the faculty at the California Institute of Technology for 12 years [2] . She is recognized for pioneering the use of fMRI with single-unit electrophysiological recordings and for discovering the macaque face patch system for face perception. She is a Howard Hughes Medical Institute Investigator and the director of the T&C Chen Center for Systems Neuroscience. [3] She won a MacArthur "Genius" fellowship in 2018. [4] Tsao was elected a member of the National Academy of Sciences in 2020. [5] After joining UC Berkeley in 2021, her current research [6] explores visual perception in primates in order to understand how the brain creates our sense of reality.

Contents

Early life and education

Tsao was born in Changzhou, China before her family immigrated to the United States when she was four. [7] She grew up in College Park, Maryland and attended Springbrook High School. [8] Her interest in science and in visual neuroscience in particular was inspired by the Feynman Lectures and Kant's Critique of Pure Reason. [9] She completed her B.S. in biology and mathematics in just three years at Caltech in 1996. [10] She then worked with Margaret Livingstone at the Harvard Medical School, where she received her PhD in neuroscience in 2002 and continued to work as a postdoctoral fellow. [10] In 2004 she received the Sofia Kovalevskaya Award from the Humboldt Foundation, which allowed her to start her own independent research group at the University of Bremen in Germany from 2004 to 2008. [11] In 2009 she joined the faculty at Caltech to teach biology, where she also became a Leadership Chair of the Tianqiao and Chrissy Chen Center for Systems Neuroscience. [12] [13] She went on to join the Allen Institute for Brain Science symposium in 2010. [14]

Career and research

As a PhD student working with Margaret Livingstone, Tsao began by studying stereopsis in macaques using single-unit electrophysiological recordings. She then became interested in using fMRI, a technique usually used to visualize the activity of brain areas in humans, to image brain regions in macaques. She collaborated with Roger Tootell to use fMRI to image brain regions involved in depth perception, and then collaborated with Winrich Freiwald, a postdoctoral fellow working with Nancy Kanwisher at MIT, to combine single-unit electrophysiology with fMRI to study face perception in macaques. [11] Similar to the fusiform face area identified in humans with, they discovered a series of small brain areas, referred to as the macaque face patch system, [15] that contain neurons which are selectively activated by faces. [16] [17] [18] Tsao and her lab have continued to make significant advances in understanding the specific facial features that cause neurons in these face patches to be activated. [19] In 2017, her lab "cracked the code" of how our brains recognize faces, [20] identifying the feature dimensions that cause face-selective neurons in different face patches of the IT cortex to respond to faces. Thus, the images of faces presented to the monkeys could be precisely reconstructed from face-selective neurons' activity. [21]

Tsao was named in MIT Technology Review's TR35 list in 2007. [22] She is serving on the Advisory Committee to the NIH Director (BRAIN Initiative Working Group 2.0) established in 2018, the group that advises on allocation of $1.511 billion toward neuroscience research. [23]

Publications

Doris Tsao has authored or co-authored numerous influential publications in the field of neuroscience, particularly in the areas of visual perception and the neural basis of cognition. Among Dr. Doris Tsao's extensive body of work, [24] several publications have garnered significant attention and acclaim within the field of neuroscience.

Her landmark paper, A cortical region consisting entirely of face-selective cells [25] , published in Science (journal) in 2006, revealed the existence of specialized brain regions dedicated to processing faces. Tsao and her colleagues identified "face patches" in the brains of macaque monkeys, providing crucial insights into the neural mechanisms underlying the facial recognition system. Functional compartmentalization and viewpoint generalization within the macaque face-processing system [26] , published in Science (journal) in 2008, provides insights into the organization and function of the face-processing system in the macaque brain. Using functional magnetic resonance imaging (fMRI), they identify specialized regions in the inferior temporal cortex that respond strongly to faces. Within these regions, they discover functional compartmentalization, with different sub-regions specialized in processing specific facial features like identity or expression. Another notable contribution published in Nature Neuroscience in 2009 was her paper on Faces and objects in macaque cerebral cortex [27] , where Tsao and her team further explored the organization of face-selective cells in the macaque cortex, shedding light on the distinction between processing faces and other objects.

These publications represent just a fraction of Tsao's extensive body of work, which has significantly advanced our understanding of the neural basis of visual perception and cognition.

Other popular publications:

See also

Related Research Articles

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<span class="mw-page-title-main">Color constancy</span> How humans perceive color

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<span class="mw-page-title-main">Visual system</span> Body parts responsible for vision

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The receptive field, or sensory space, is a delimited medium where some physiological stimuli can evoke a sensory neuronal response in specific organisms.

Visual processing is a term that is used to refer to the brain's ability to use and interpret visual information from the world. The process of converting light energy into a meaningful image is a complex process that is facilitated by numerous brain structures and higher level cognitive processes. On an anatomical level, light energy first enters the eye through the cornea, where the light is bent. After passing through the cornea, light passes through the pupil and then lens of the eye, where it is bent to a greater degree and focused upon the retina. The retina is where a group of light-sensing cells, called photoreceptors are located. There are two types of photoreceptors: rods and cones. Rods are sensitive to dim light and cones are better able to transduce bright light. Photoreceptors connect to bipolar cells, which induce action potentials in retinal ganglion cells. These retinal ganglion cells form a bundle at the optic disc, which is a part of the optic nerve. The two optic nerves from each eye meet at the optic chiasm, where nerve fibers from each nasal retina cross which results in the right half of each eye's visual field being represented in the left hemisphere and the left half of each eye's visual fields being represented in the right hemisphere. The optic tract then diverges into two visual pathways, the geniculostriate pathway and the tectopulvinar pathway, which send visual information to the visual cortex of the occipital lobe for higher level processing.

The grandmother cell, sometimes called the "Jennifer Aniston neuron", is a hypothetical neuron that represents a complex but specific concept or object. It activates when a person "sees, hears, or otherwise sensibly discriminates" a specific entity, such as their grandmother. It contrasts with the concept of ensemble coding, where the unique set of features characterizing the grandmother is detected as a particular activation pattern across an ensemble of neurons, rather than being detected by a specific "grandmother cell".

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<span class="mw-page-title-main">Colour centre</span> Brain region responsible for colour processing

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References

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