Related Experiment Video
Updated: Jul 6, 2026
07:28
Psychophysically-anchored, Robust Thresholding in Studying Pain-related Lateralization of Oscillatory Prestimulus Activity
Published on: January 21, 2017
Putaminal activity is related to perceptual certainty
M A Pastor1, E Macaluso, B L Day
1Department of the Neurosciences, Center for Applied Medical Research, University of Navarra School of Medicine, Pamplona, Spain. mapastor@unav.es
Neuroimage
|April 1, 2008
Summary
This study explored perceptual certainty using brain imaging. The right putamen showed activity linked to how certain people felt about distinguishing between one or two stimuli, suggesting its role in processing temporal information.
Area of Science:
- Neuroscience
- Psychophysics
- Sensory Perception
Background:
- Perceptual certainty, crucial for decision-making, is influenced by the timing of sensory inputs.
- The brain's processing of temporal information, especially distinguishing single from multiple stimuli, remains incompletely understood.
Purpose of the Study:
- To investigate the neural mechanisms underlying perceptual certainty in discriminating temporal features of sensory stimuli.
- To determine the brain regions involved in processing the certainty of perceiving one versus two stimuli.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to monitor brain activity in 14 healthy subjects.
- Subjects performed tactile (electrical forearm stimuli) and auditory (binaural clicks) discrimination tasks with varying inter-stimulus intervals (ISIs).
- A consistency index (CI) was calculated to quantify perceptual certainty for each subject and modality.
Main Results:
- Brain regions including the pre-supplementary motor area (pre-SMA), anterior cingulate cortex, cerebellum, and basal ganglia were activated during the task.
- Activity in the right putamen demonstrated a linear relationship with the consistency index (perceptual certainty) for both tactile and auditory stimuli.
- Distinct topographical patterns of right putamen activation were observed for the two sensory modalities.
Conclusions:
- The findings implicate the human putamen in the automatic perception of temporal features across different sensory modalities.
- This suggests a role for the putamen in integrating temporal information to form a sense of perceptual certainty.
Related Concept Videos
01:12Perceptual Constancy
Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
01:28Perception
Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
01:28Major Somatic Sensory Pathways
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the posterior columns...
01:25Factors Affecting Perception
Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
An illustrative example of a perceptual set is the scenario where an airline pilot told...
01:21Gestalt Principles of Perception
Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
01:15Depth Perception and Spatial Vision
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.