Results 21 to 30 of about 569,815 (265)

Spatial frequency discrimination in schizophrenia. [PDF]

Journal of Abnormal Psychology, 2002
Pathways within the visual system can be distinguished on the basis of selectivity for low or high spatial frequencies. Spatial frequency discrimination was evaluated in 17 medicated male patients with schizophrenia and 19 male control subjects. Subjects were required to discriminate whether pairs of high contrast, sinusoidally modulated gratings were ...
Brian F. O'Donnell, Geoffrey F. Potts, Paul G. Nestor, Kiriaki C Stylianopoulos, Martha E. Shenton, Robert W. McCarley   +5 more
openaire   +5 more sources

Distinct spatial scale sensitivities for early categorisation of Faces and Places: Neuromagnetic and Behavioural Findings

Frontiers in Human Neuroscience, 2013
Research exploring the role of spatial frequencies in rapid stimulus detection and categorisation report flexible reliance on specific spatial frequency bands.
Bhuvanesh eAwasthi, Bhuvanesh eAwasthi, Paul F Sowman, Jason eFriedman, Jason eFriedman, Mark A Williams   +5 more
doaj   +1 more source

The development of spatial frequency discrimination

Journal of Vision, 2010
We compared thresholds for discriminating spatial frequency for children aged 5, 7, and 9 years, and adults at two baseline spatial frequencies (1 and 3 cpd). In Experiment 1, the minimum change from baseline necessary to detect a change in spatial frequency from either baseline decreased with age from 34% in 5-year-olds to 11% in 7-year-olds, 8% in 9 ...
Ashna, Patel, Daphne, Maurer, Terri L, Lewis   +2 more
openaire   +2 more sources

Recurrent progressive anterior segment fibrosis syndrome following a descemet-stripping endothelial keratoplasty in an infant with congenital aniridia

Indian Journal of Ophthalmology, 2014
Progressive anterior segment fibrosis syndrome (ASFS), after intraocular surgery in older children (≥9 years) and adults with congenital aniridia, is described in the literature.
Mihir Kothari, Kavita Rao, Samita Moolani   +2 more
doaj   +1 more source

Repetition blindness for natural images of objects with viewpoint changes

Frontiers in Psychology, 2013
When stimuli are repeated in a rapid serial visual presentation (RSVP), observers sometimes fail to report the second occurrence of a target. This phenomenon is referred to as repetition blindness (RB).
Stephane eBuffat, justin ePlantier, Corinne eRoumes, Jean eLorenceau   +3 more
doaj   +1 more source

Influence of multiple sclerosis, age and degree of disability, in the position of the contrast sensitivity curve peak

Indian Journal of Ophthalmology, 2014
Context: Contrast sensitivity (CS) function is one of the most important tests available for evaluating visual impairment. Multiple sclerosis (MS) can produce highly selective losses in visual function and psychophysical studies have demonstrated CS ...
A F Nunes, P M L Monteiro, M Vaz Pato
doaj   +1 more source

Synthetic Tactile Sensor for Macroscopic Roughness Estimation Based on Spatial-Coding Contact Processing

Sensors
Traditional tactile sensors primarily measure macroscopic surface features but do not directly estimate how humans perceive such surface roughness. Sensors that mimic human tactile processing could bridge this gap.
Muhammad Irwan Yanwari, Shogo Okamoto
doaj   +1 more source

Adaptation to a ‘Spatial-Frequency Doubled’ Stimulus [PDF]

Perception, 1980
The perceived spatial frequency of low-frequency sinusoidal gratings is elevated when the gratings are temporally modulated sufficiently rapidly. Although this phenomenon is usually called ‘spatial-frequency doubling’, the magnitude of this spatial-frequency elevation depends on the spatial and temporal parameters of the grating and may be less than ...
Thompson, Peter Gage, Murphy, Brian
openaire   +3 more sources

Lorlatinib‐Containing Therapy for MYCN‐Amplified, ALK‐Mutated Neuroblastoma With Bulky Leptomeningeal Relapse: A Case Report

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Central nervous system (CNS) relapse of neuroblastoma carries a poor prognosis, and craniospinal irradiation (CSI) poses substantial long‐term toxicity in young children. We report a toddler with MYCN‐amplified neuroblastoma harboring somatic ALK R1275Q who developed extensive leptomeningeal relapse with paraplegia.
Jinwoo Kim, Minji Kim, Nani Jung, Sung Eun Kim, Ji Yoon Kim, Mi Ae Chu, Jung Eun Kwon, Yeo Hyang Kim, So Mi Lee, Ki‐Su Park, Jeong Eun Lee, Ye Jee Shim   +11 more
wiley   +1 more source

The effects of tDCS across the Spatial Frequencies and Orientations that comprise the Contrast Sensitivity Function

Frontiers in Psychology, 2015
Trans-cranial Direct Current Stimulation (tDCS) has recently been employed in traditional psychophysical paradigms in an effort to measure direct manipulations on spatial frequency channel operations in the early visual system.
Bruno eRichard, Bruno eRichard, Aaron Paul Johnson, Benjamin eThompson, Benjamin eThompson, Bruce C Hansen   +5 more
doaj   +1 more source