Source Paper
Functional Neuroanatomy of the Noradrenergic Locus Coeruleus: Its Roles in the Regulation of Arousal and Autonomic Function Part II: Physiological and Pharmacological Manipulations and Pathological Alterations of Locus Coeruleus Activity in Humans
E. Samuels, E. Szabadi
Current Neuropharmacology • 2008
Pupillary Stability Test
Objective: Records pupil diameter over eleven minutes to measure spontaneous pupillary fluctuations as an index of arousal level
This is a Pupillary Stability Test protocol using Not specified in text as the model organism. The procedure involves 3 procedural steps, 1 equipment items. Extracted from a 2008 paper published in Current Neuropharmacology.
Model and subjects
Not specified in text • Not specified in text • unknown • Not specified in text • Not specified in text
Study window
~11 minutes hands-on
Core workflow
Recording Setup • Pupil Diameter Recording • Observation of Pupillary Fatigue Waves
Primary readouts
- Pupil diameter measurements over eleven minutes
- Power of pupillary fatigue wave fluctuations
- Spontaneous pupillary fluctuations in darkness
- Index of arousal level based on fluctuation power
Key equipment and reagents
Verified items
0
Direct vendor links
0
Use this page as an execution guide, then fall back to the source paper whenever you need exact exclusions, dosing details, or assay-specific caveats.
Confirm first
- Verify the animal model, intervention setup, and collection timepoints against the source paper.
- Check that every direct vendor link matches the exact specification your lab plans to run.
Use the page like this
- Work through the protocol steps in order and use the inline vendor chips only when you need to source or verify an item.
- Jump to Experimental Context for readouts, data shape, and analysis flow before planning downstream analysis.
Protocol Steps
Start here. The step list is optimized for running the experiment, with direct vendor links available inline when you need to source a cited item.
Recording Setup
Position subject and prepare pupillary recording apparatus for measurement
Note: Recording environment should be in darkness to allow measurement of spontaneous pupillary fluctuations
View evidence from paper
“records pupil diameter over a period of eleven minutes. During the period of recording slow fluctuations appear in the diameter of the pupil”
Pupil Diameter Recording
Record pupil diameter continuously throughout the eleven-minute test period
Note: Measurement should capture spontaneous fluctuations in pupil diameter occurring during the recording period
View evidence from paper
“records pupil diameter over a period of eleven minutes”
Observation of Pupillary Fatigue Waves
Monitor and record the slow fluctuations that appear in pupil diameter during the recording period, referred to as pupillary fatigue waves
Note: These waves represent spontaneous fluctuations in pupil diameter that occur in darkness
View evidence from paper
“During the period of recording slow fluctuations appear in the diameter of the pupil ('pupillary fatigue waves')”