Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Publication

Intra and cross-modal negative BOLD response to contrast-varying visual stimuli

Rolf Gruetter, Wietske Van der Zwaag, João Pedro Forjaco Jorge, Patricia Figueiredo
2012
Conference Papers

Abstract

The BOLD contrast is widely used to study brain function. Under externally-applied stimuli, positive BOLD responses (PBR) are generally attributed to local increases in brain activity. Negative BOLD responses (NBR) are also frequently observed, but their underlying neurovascular-coupling mechanisms are less well-understood. Here, we study the NBR to contrast-varying visual stimuli. Both intra-modal (located in regions directly associated with the stimulus) and cross-modal responses (located in functionally-distinct regions) are analyzed.

Official source

https://infoscience.epfl.ch/entities/publication/5420a845-d917-49af-b6f2-e35dbb968e9e

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Rolf Gruetter, Wietske Van der Zwaag, João Pedro Forjaco Jorge, Patricia Figueiredo
2012
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5420a845-d917-49af-b6f2-e35dbb968e9e

About this result

Related concepts (16)

Brain

A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the head, usually close to the sensory organs for senses such as vision. It is the most complex organ in a vertebrate's body. In a human, the cerebral cortex contains approximately 14–16 billion neurons, and the estimated number of neurons in the cerebellum is 55–70 billion. Each neuron is connected by synapses to several thousand other neurons.

Human brain

The human brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system. The brain consists of the cerebrum, the brainstem and the cerebellum. It controls most of the activities of the body, processing, integrating, and coordinating the information it receives from the sense organs, and making decisions as to the instructions sent to the rest of the body. The brain is contained in, and protected by, the skull bones of the head.

Electroencephalography

Electroencephalography (EEG) is a method to record an electrogram of the spontaneous electrical activity of the brain. The biosignals detected by EEG have been shown to represent the postsynaptic potentials of pyramidal neurons in the neocortex and allocortex. It is typically non-invasive, with the EEG electrodes placed along the scalp (commonly called "scalp EEG") using the International 10–20 system, or variations of it. Electrocorticography, involving surgical placement of electrodes, is sometimes called "intracranial EEG".

Related publications (30)

Intra and cross-modal negative BOLD response to contrast-varying visual stimuli

Graph Chatbot

Reverse engineering primate sensorimotor control with machine learning

Principles of inter-areal interactions in cortical sensory processing

White adipose tissue distribution and amount are associated with increased white matter connectivity