Ethan J. Duwell
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View article: BOLD Contrast Response Characteristics of Aberrant Voxels with Bilateral Visual Population Receptive Fields in Human Albinism
BOLD Contrast Response Characteristics of Aberrant Voxels with Bilateral Visual Population Receptive Fields in Human Albinism Open
Albinism is an inherited disorder characterized by disrupted melanin production in the eye, and often in the skin and hair. This retinal hypopigmentation is accompanied by pathological decussation of many temporal retinal afferents at the …
View article: A Generalized Framework for Optimizing and Informing the Implementation of QUEST
A Generalized Framework for Optimizing and Informing the Implementation of QUEST Open
QUEST allows rapid estimation of psychophysical thresholds and has become a cornerstone tool in modern behavioral testing (Watson AB, Pelli DG, 1983). However, there is widespread variability in how QUEST is implemented. Consequently, choo…
View article: The Signal and the Noise: Optimizing the Reverse Correlation Technique via Noise Selection
The Signal and the Noise: Optimizing the Reverse Correlation Technique via Noise Selection Open
The perceptual judgements underlying object recognition are thought to occur by matching visual stimuli against some internal template. However, the visualization of such templates remains difficult given their inaccessible nature. Nonethe…
View article: Aberrant visual population receptive fields in human albinism
Aberrant visual population receptive fields in human albinism Open
Retinotopic organization is a fundamental feature of visual cortex thought to play a vital role in encoding spatial information. One important aspect of normal retinotopy is the representation of the right and left hemifields in contralate…
View article: The relationship between retinal cone density and cortical magnification in human albinism
The relationship between retinal cone density and cortical magnification in human albinism Open
The human fovea lies at the center of the retina and supports high-acuity vision. In normal visual system development, the highest acuity is correlated with both a high density of cone photoreceptors in the fovea and a magnified retinotopi…
View article: A Natural Experiment in Aberrant Retino-Cortical Organization
A Natural Experiment in Aberrant Retino-Cortical Organization Open
Naturally occurring cases of extreme variation in visual system anatomy and neurophysiology, as in albinism, can aid identification of key factors responsible for brain-related vision deficits. To this end, we have quantitatively character…
View article: Retinal and Cortical Determinants of Cortical Magnification in Human Albinism
Retinal and Cortical Determinants of Cortical Magnification in Human Albinism Open
The human fovea lies at the center of the retina and supports high-acuity vision. In normal visual system development, foveal acuity is correlated with both a high density of cone photoreceptors at this location and a magnified retinotopic…
View article: Aberrant Population Receptive Fields in Albinism
Aberrant Population Receptive Fields in Albinism Open
During development, retinal hypo-pigmentation in albinism leads to aberrant decussation of temporal retinal afferents at the optic chiasm thereby producing partially superimposed representations of opposite hemi-fields in visual cortex. Pr…