The Tadpole Pupil: Case Series With Review of the Literature and New Considerations
Frontiers in Neurology, 2019 Tadpole pupil is a rare phenomenon in which segmental spasm of the iris dilator muscle results in a tadpole-shaped pupil. The pupillary distortion is usually unilateral, lasts several minutes, and can recur in clusters.
Morgane Udry +3 more
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Pupil-based arousal self-regulation: impact on physiological and affective responses to emotional stimuli [PDF]
Translational PsychiatryPupil-based biofeedback has been shown to enable healthy participants to volitionally control locus coeruleus-mediated arousal. The locus coeruleus is considered a critical player in the central stress circuitry and dysfunctions in the system, causing ...
Jenny Imhof +3 more
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Pupil size is linked to opposite signal fluctuations between cortical BOLD and ventricular CSF [PDF]
NeuroImagePupillometry has been used as a biomarker of activity in the Locus Coeruleus (LC), a noradrenergic nucleus crucial for arousal. As the LC has been implicated in modulating cerebrospinal fluid (CSF) flow, here we investigated the associations of pupil ...
Sukru Baris Demiral +2 more
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Pupil assessment in optic nerve disorders [PDF]
Eye, 2004 The normal pupillary constriction to light is an involuntary reflex that can be easily elicited and observed without specialized equipment or discomfort to the patient. Attenuation of this reflex in optic nerve disorders was first described 120 years ago.
F D Bremner
exaly +3 more sources
Pupil responses to colorfulness are selectively reduced in healthy older adults [PDF]
Scientific Reports, 2023 The alignment between visual pathway signaling and pupil dynamics offers a promising non-invasive method to further illuminate the mechanisms of human color perception.
Janneke E. P. van Leeuwen +5 more
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Modulating cortical excitability and cortical arousal by pupil self-regulation
Nature CommunicationsThe brain’s arousal state (i.e., central arousal) is regulated by multiple neuromodulatory nuclei in the brainstem and significantly influences high-level cognitive processes.
Marieke Lieve Weijs +7 more
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How pupil responses track value-based decision-making during and after reinforcement learning.
PLoS Computational Biology, 2018 Cognition can reveal itself in the pupil, as latent cognitive processes map onto specific pupil responses. For instance, the pupil dilates when we make decisions and these pupil size fluctuations reflect decision-making computations during and after a ...
Joanne C Van Slooten +3 more
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Pupil adaptation corresponds to quantitative measures of autism traits in children
Scientific Reports, 2017 The pupil is known to reflect a range of psychological and physiological variables, including cognitive effort, arousal, attention, and even learning.
Antoinette Sabatino DiCriscio +1 more
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Multi-level processing of emotions in life motion signals revealed through pupil responses
eLifePerceiving emotions from the movements of other biological entities is critical for human survival and interpersonal interactions. Here, we report that emotional information conveyed by point-light biological motion (BM) triggered automatic physiological
Tian Yuan, Li Wang, Yi Jiang
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Contribution of pupillary light reflex assessment to Glasgow Coma Scale for prognostication in patients with traumatic brain injury [PDF]
Journal of Neurocritical Care, 2021 Background Glasgow Coma Scale (GCS) and the pupillary light reflex (PLR) are important prognostic tools for traumatic brain injury (TBI). This study compared the predictability of GCS, GCS plus manual PLR (GCS-P), GCS plus Neurological Pupil index (GCS ...
Amna A. Butt +6 more
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