Advertisement

Topics

Parsing a mental program: Fixation-related brain signatures of unitary operations and routines in natural visual search.

08:00 EDT 7th August 2018 | BioPortfolio

Summary of "Parsing a mental program: Fixation-related brain signatures of unitary operations and routines in natural visual search."

Visual search involves a sequence or routine of unitary operations (i.e. fixations) embedded in a larger mental global program. The process can indeed be seen as a program based on a while loop (while the target is not found), a conditional construct (whether the target is matched or not based on specific recognition algorithms) and a decision making step to determine the position of the next searched location based on existent evidence. Recent developments in our ability to co-register brain scalp potentials (EEG) during free eye movements has allowed investigating brain responses related to fixations (fixation-Related Potentials; fERPs), including the identification of sensory and cognitive local EEG components linked to individual fixations. However, the way in which the mental program guiding the search unfolds has not yet been investigated. We performed an EEG and eye tracking co-registration experiment in which participants searched for a target face in natural images of crowds. Here we show how unitary steps of the program are encoded by specific local target detection signatures and how the positioning of each unitary operation within the global search program can be pinpointed by changes in the EEG signal amplitude as well as the signal power in different frequency bands. By simultaneously studying brain signatures of unitary operations and those occurring during the sequence of fixations, our study sheds light into how local and global properties are combined in implementing visual routines in natural tasks.

Affiliation

Journal Details

This article was published in the following journal.

Name: NeuroImage
ISSN: 1095-9572
Pages:

Links

DeepDyve research library

PubMed Articles [21394 Associated PubMed Articles listed on BioPortfolio]

Effect of meditation on psychological distress and brain functioning: A randomized controlled study.

Psychological stability and brain integration are important factors related to physical and mental health and organization effectiveness. This study tested whether a mind-body technique, the Transcend...

Representation, Pattern Information, and Brain Signatures: From Neurons to Neuroimaging.

Human neuroimaging research has transitioned from mapping local effects to developing predictive models of mental events that integrate information distributed across multiple brain systems. Here we r...

Cognitive loading via mental arithmetic modulates effects of blink-related oscillations on precuneus and ventral attention network regions.

Blink-related oscillations (BROs) have been linked with environmental monitoring processes associated with blinking, with cortical activations in the bilateral precuneus. Although BROs have been descr...

Extracting orthogonal subject- and condition-specific signatures from fMRI data using whole-brain effective connectivity.

The study of brain communication based on fMRI data is often limited because such measurements are a mixture of session-to-session variability with subject- and condition-related information. Disentan...

Three perspectives on mental health problems of young adults and their parents at a 15-year follow-up of the family bereavement program.

Effects are reported of the Family Bereavement Program (FBP) on the mental health of bereaved youth and their surviving parent 15 years following the program.

Clinical Trials [11467 Associated Clinical Trials listed on BioPortfolio]

Characterization of Independant Task Neural Correlates of Different Levels of Mental Workload

The goal is to identify neuro-physiological signatures at several levels of mental workload during the realisation of tasks, performed by all the subjects. In parallel, there will be a me...

Study of Laparoscopic Inguinal Hernia Repair

Although mesh fixation has been associated to an increased incidence of nerve injury and involves increased operative costs, many surgeons feel that fixation is necessary to reduce the ris...

"EspaiJove.Net"- a School-based Intervention Program to Promote Mental Health in Adolescent Population

Objective: To evaluate the efficacy of 3 sensitivity and mental health literacy programs for young students in the increase of mental health knowledge, to help seeking and reducing the sti...

Functional MRI Changes Resulting From the Feuerstein Program in Older People With Mild Cognitive Impairment (MCI)

Background: The Feuerstein Instrumental Enrichment Program was designed to prevent mental deterioration and preserve cognitive abilities among people aged 60 and above. The program is an a...

Blade vs Screw Intertrochanteric Hip Fracture Fixation Study

This study evaluates the rate of cut-out and fixation failures in helical blade fixation versus lag screw fixation for cephalomedullary nailing of peritrochanteric femur fractures.

Medical and Biotech [MESH] Definitions

Branch of psychiatry concerned with the provision and delivery of a coordinated program of mental health care to a specified population. The foci included in this concept are: all social, psychological and physical factors related to etiology, prevention, and maintaining positive mental health in the community.

A late-appearing component of the event-related potential. P300 stands for a positive deflection in the event-related voltage potential at 300 millisecond poststimulus. Its amplitude increases with unpredictable, unlikely, or highly significant stimuli and thereby constitutes an index of mental activity. (From Campbell, Psychiatric Dictionary, 6th ed)

Voluntary organizations which support educational programs and research in psychiatry with the objective of the promotion of mental health. An early association in the United States was founded as the National Committee for Mental Hygiene in 1909, became the Mental Health Association in 1976 and later the National Mental Health Association in 1980. State and local mental health associations in this country are chartered by the national organization and affiliated with it.

The process of formulating, improving, and expanding educational, managerial, or service-oriented work plans (excluding computer program development).

Anterior midline brain, cranial, and facial malformations resulting from the failure of the embryonic prosencephalon to undergo segmentation and cleavage. Alobar prosencephaly is the most severe form and features anophthalmia; cyclopia; severe MENTAL RETARDATION; CLEFT LIP; CLEFT PALATE; SEIZURES; and microcephaly. Semilobar holoprosencepaly is characterized by hypotelorism, microphthalmia, coloboma, nasal malformations, and variable degrees of mental retardation. Lobar holoprosencephaly is associated with mild (or absent) facial malformations and intellectual abilities that range from mild mental retardation to normal. Holoprosencephaly is associated with CHROMOSOME ABNORMALITIES.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article