First- and second-order contrast sensitivity functions reveal disrupted visual processing following mild traumatic brain injury
| Autor: | Tatiana Ruiz, Alexandre Reynaud, Maude Laguë-Beauvais, Daniel P. Spiegel, Robert F. Hess, Reza Farivar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Adult
Male Second order vision Visual perception Adolescent Traumatic brain injury media_common.quotation_subject Population Motion perception 050105 experimental psychology Visual processing Young Adult 03 medical and health sciences 0302 clinical medicine Sensory threshold Brain Injuries Traumatic medicine Humans Contrast (vision) 0501 psychology and cognitive sciences Contrast sensitivity education media_common education.field_of_study 05 social sciences Middle Aged medicine.disease Sensory Systems Ophthalmology Visual cortex medicine.anatomical_structure Sensory Thresholds First order vision Female Psychology Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Vision Research. 122:43-50 |
| ISSN: | 0042-6989 |
| DOI: | 10.1016/j.visres.2016.03.004 |
| Popis: | Vision is disrupted by traumatic brain injury (TBI), with vision-related complaints being amongst the most common in this population. Based on the neural responses of early visual cortical areas, injury to the visual cortex would be predicted to affect both 1(st) order and 2(nd) order contrast sensitivity functions (CSFs)-the height and/or the cut-off of the CSF are expected to be affected by TBI. Previous studies have reported disruptions only in 2(nd) order contrast sensitivity, but using a narrow range of parameters and divergent methodologies-no study has characterized the effect of TBI on the full CSF for both 1(st) and 2(nd) order stimuli. Such information is needed to properly understand the effect of TBI on contrast perception, which underlies all visual processing. Using a unified framework based on the quick contrast sensitivity function, we measured full CSFs for static and dynamic 1(st) and 2(nd) order stimuli. Our results provide a unique dataset showing alterations in sensitivity for both 1(st) and 2(nd) order visual stimuli. In particular, we show that TBI patients have increased sensitivity for 1(st) order motion stimuli and decreased sensitivity to orientation-defined and contrast-defined 2(nd) order stimuli. In addition, our data suggest that TBI patients' sensitivity for both 1(st) order stimuli and 2(nd) order contrast-defined stimuli is shifted towards higher spatial frequencies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect