• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
The cognitive neuroscience of sustained attention
The cognitive neuroscience of sustained attention

View PDF - Laboratory of Brain, Hearing and Behavior
View PDF - Laboratory of Brain, Hearing and Behavior

... was located in the inactivated portion of the SC space map. The impairment was specific to selection among multiple, competing stimuli, and was not because of visual or motor deficits. When the difference between the oddball and the other stimuli was large (easy task), the impairment resulting from ...
Experimental Brain Research 221(1)
Experimental Brain Research 221(1)

... cortex near the junction of the dorsal parieto-occipital sulcus, POS) (Fattori et al. 2001, 2009a; Galletti et al. 2003) and a putative ‘parietal reach region’ (PRR) that straddles the boundary between MIP and V6A (Batista et al. 1999; Buneo et al. 2002; Chang et al. 2008; Andersen and Cui 2009). PR ...
Extended PDF
Extended PDF

... p values are based on permutation tests using a circular log-likelihood ratio statistic. For the neural weight index wAV, they are corrected for multiple comparisons across the eight regions of interest. n = 5. Asterisks indicate significant p values. VR, visual reliability; TR, task relevance; S, s ...
Is neocortex essentially multisensory?
Is neocortex essentially multisensory?

... influence orienting behavior. Cats typically show multisensory enhancement of orienting to congruent visual– auditory spatial targets when stimuli are near threshold. When the anterior ectosylvian sulcus or the rostral lateral suprasylvian sulcus is cryogenically inactivated, the multisensory behavi ...
The neural mechanisms of perceptual filling-in
The neural mechanisms of perceptual filling-in

... of filling-in. Our knowledge is still far from complete, but at least we have sufficient data to draw preliminary conclusions and to think about the next step. Throughout this article, I use the term filling-in to indicate a perceptual event without any assumption about the underlying neural mechani ...
Ventral Intraparietal Area of the Macaque: Anatomic Location and
Ventral Intraparietal Area of the Macaque: Anatomic Location and

... very near (within 5 cm) the face. These neurons maintained their preference for near stimuli when tested monocularly, suggesting that visual cues other than disparity can support this response. These neurons typically could not be driven by small spots presented on the tangent screen (at 57 cm). 5. ...
Neuronal responses to face-like and facial stimuli in the monkey
Neuronal responses to face-like and facial stimuli in the monkey

... that includes the SC and is common to many vertebrates, and also suggest that this system may not be sensitive to face differences among the species. Furthermore, non-invasive human studies of patients with blindsight have suggested that the subcortical route, including the SC, the pulvinar, and the ...
invariant face and object recognition in the visual system
invariant face and object recognition in the visual system

... generalization to similar stimuli (in the Hamming distance sense, see Rolls and Treves, 1997), graceful degradation (fault tolerance), and some locality to the representation, so that some single neurons which receive inputs from such a representation can obtain sufficient information without requir ...
Visual system
Visual system

... called emmetropia (G. emmetros, according to measure). Sadly, such eyes are rare. For example, many of us require glasses long, long before we reach age 45. Discrepancies between the eye and its optics cause the majority of the human population to have some form of refractive error. Refractive probl ...
Imagery and Perception Share Cortical
Imagery and Perception Share Cortical

... of 3 different object exemplars in 4 different categories (Fig. 1A). In the perception condition, the pictures (size 4.8) were presented for 4 s at a position either 6 left or right of fixation (Fig. 1B,C) in pseudorandom order. In the imagery condition, participants received auditory cues that in ...
`What` Is Happening in the Dorsal Visual Pathway
`What` Is Happening in the Dorsal Visual Pathway

... latencies than those measured from the ventral pathway, undermining the possibility that the former representations result from the cascaded projection from the ventral pathway [41,57]. Similarly, in an event-related potential (ERP) study in humans, neural responses following action observation were ...
Playing the electric light orchestra—how electrical stimulation of
Playing the electric light orchestra—how electrical stimulation of

... scenes from memory [10,19,29], while in other studies only simple form sensations, such as phosphenes or colour spots, were evoked [18,20,28] (figure 1a). The circuitry of visual areas further downstream may generally support more complex electrical activity patterns that cannot be readily induced ...
fMR-adaptation reveals separate processing regions for the
fMR-adaptation reveals separate processing regions for the

... of PB’s spared colour processing. In summary, while the psychophysical testing revealed a striking dissociation between shape and colour processing, these latter imaging results, combined with our recent fMRI results, also suggest that information about an object’s colour is extracted relatively ear ...
Persistent perceptual delay for head movement onset
Persistent perceptual delay for head movement onset

... Contrary to this notion that vestibular stimulation should be fast the perceived timing of vestibular stimulation has been found to be slow. Barnett-Cowan and Harris (2009) measured the difference in reaction times (RTs) between GVS, light, touch and sound stimuli. They found that RTs to GVS were si ...
Vision for Prehension in the Medial Parietal Cortex - Gallettilab
Vision for Prehension in the Medial Parietal Cortex - Gallettilab

... cortex (see Fig. 1C). This cortical region belongs to the classic visual association cortex, namely area 19 of Brodmann (for a thorough review on this topic, see Gamberini et al. 2015). However, since the first description of this region, it was evident that not all neurons were visually activated. C ...
Neuronal activity in human primary visual cortex correlates with
Neuronal activity in human primary visual cortex correlates with

... using visual-evoked potentials (VEP; for example, ref. 15) and magnetoencephalography (MEG)16,17. These studies reported strong fluctuations in the VEP and MEG signals using sensors placed over posterior (occipital) areas, but it was not possible to pinpoint the precise visual area(s) from which tho ...
new insights into the functions of the superior temporal cortex
new insights into the functions of the superior temporal cortex

... (FIG. 2). Patients might seem to be blind on the contralesional side, but perceive visual stimuli in that hemifield when explicitly instructed that such stimuli will appear there. This forced cueing is only transiently effective; patients do not adopt the compensatory shift to the contralesional sid ...
Integration of Visual and Auditory Information by Superior Temporal
Integration of Visual and Auditory Information by Superior Temporal

... may occur, not just with signals received from overlapping regions of sensory space but also with reference to the content of the information that the sensory signals might carry (Calvert, 2001). Calvert (2000) examined human brain activity to a moving face talking (the visual input) and speech (the ...
How Do We See the World?
How Do We See the World?

Anatomic Studies on the Superior Colliculus
Anatomic Studies on the Superior Colliculus

... and monkey30 it appears to be distributed within the same zone as the crossed pathway. The uncrossed pathway relates to the visual field map in that it is always found anteriorly, but its posterior extent varies between and within animal groups. It is less extensive, for example, in albino than pigm ...
The Optic Tectum of Birds - Department of Psychology
The Optic Tectum of Birds - Department of Psychology

... Figure 3. Connectivity of the isthmal nuclei with the tectum. (A) shows a coronal section through the tectum showing typical injections of fluorescent biotinylated dextran amines (BDA). A retrogradely labelled cell and anterogradely labelled terminals from the red injection can be seen in parvocellu ...
Response Suppression in V1 Agrees with Psychophysics of
Response Suppression in V1 Agrees with Psychophysics of

... consisting of a 750 msec stimulus display, followed by a 1050 msec response period. For one observer (BZL), the response period was reduced to 750 msec, and each block, thus, contained six instead of five trials. The surround contrast was the same in all trials of any given scan, but the pedestal co ...
A Neural Theory of Visual Attention
A Neural Theory of Visual Attention

... finding is readily explained by NTVA’s notion of filtering on the basis of attentional weights. A second typical effect of attention is a modest modulation of firing rates with a single stimulus in the RF. In the Attentional Effects With a Single Stimulus in the RF section, this finding is explained ...
Lateral Connectivity and Contextual Interactions in Macaque
Lateral Connectivity and Contextual Interactions in Macaque

... contour integration in primary visual cortex (V1): intrinsic horizontal connections and feedback from higher cortical areas. To distinguish between these, we combined functional mapping with a new technique for labeling axons, a recombinant adenovirus bearing the gene for green fluorescent protein ( ...
< 1 2 3 4 5 6 7 8 ... 19 >

Visual search

Visual search is a type of perceptual task requiring attention that typically involves an active scan of the visual environment for a particular object or feature (the target) among other objects or features (the distractors). Visual search can take place either with or without eye movements. The ability to consciously locate an object (target) amongst a complex array of stimuli (distractors) has been extensively studied over the past 40 years. Practical examples of this can be seen in everyday life such as picking out a product on a supermarket shelf, animals searching for food amongst piles of leaves, trying to find your friend in a large crowd of people and playing visual search tasks such as Where's Wally? Many visual search paradigms have used eye movements as a means to measure the degree of attention given to stimuli.However, vast research to date suggests that eye movements move independently of attention and therefore is not a reliable method to examine the role of attention. Much of the previous literature on visual search uses reaction time in order to measure the time taken to detect the target amongst its distractors. An example of this could be a green square (target) amongst a set of red circles (distractors).
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report