Hubbry Logo
search
logo
1932275

Neural binding

logo
Community Hub0 Subscribers
Write something...
Be the first to start a discussion here.
Be the first to start a discussion here.
See all
Neural binding

Neural binding is the neuroscientific aspect of what is commonly known as the binding problem: the interdisciplinary difficulty of creating a comprehensive and verifiable model for the unity of consciousness. "Binding" refers to the integration of highly diverse neural information in the forming of one's cohesive experience. The neural binding hypothesis states that neural signals are paired through synchronized oscillations of neuronal activity that combine and recombine to allow for a wide variety of responses to context-dependent stimuli. These dynamic neural networks are thought to account for the flexibility and nuanced response of the brain to various situations. The coupling of these networks is transient, on the order of milliseconds, and allows for rapid activity.

A viable mechanism for this phenomenon must address (1) the difficulties of reconciling the global nature of the participating (exogenous) signals and their relevant (endogenous) associations, (2) the interface between lower perceptual processes and higher cognitive processes, (3) the identification of signals (sometimes referred to as “tagging”) as they are processed and routed throughout the brain, and (4) the emergence of a unity of consciousness.

Proposed adaptive functions of neural binding have included the avoidance of hallucinatory phenomena generated by endogenous patterns alone as well as the avoidance of behavior driven by involuntary action alone.

There are several difficulties that must be addressed in this model. First, it must provide a mechanism for the integration of signals across different brain regions (both cortical and subcortical). It must also be able to explain the simultaneous processing of unrelated signals that are held separate from one another and integrated signals that must be viewed as a whole.

The study of the binding problem in neuroscience stems from the much older psychological study of the binding phenomenon, which has its roots in the ancient philosophical study of the same problems. Today, there is a close interplay between neuroscience and psychology, which is especially relevant to neural binding.

Gestalt psychology is a field that has been intertwined with neural binding due to its advances in conceptualizing how the brain views objects, reacts to stimuli, and then reacts on a global level. Since Gestalt Psychology has become so involved, “grouping” has become an important part of understanding neural binding. The scientists that supported this theory were solely focused on the idea that mechanisms in the brain operated preattentively.

"Grouping" has become especially important for neural binding due to studies in gamma wave activity in the brain. From single-unit recording scientists have been able to measure the oscillatory neuronal activity and have been able to better their understanding of the grouping or pairing of neurons. Thus, these pairings connect with Gestalt psychology and its theory that objects are seen independently of their separate pieces, in a more global manner. A study done by Gray, Konig, Engel and Singer in 1989 reported that when studying visual cortex cells, light moving in opposite directions had low relation to one another. Yet when the light rays were then pointed in the same direction, the correlative relationship was stronger. A paper addressing this idea states, "Thus, correlated activity was only obtained when cells responded to different aspects of the same 'Gestalt'". Other studies using EEGs from the human scalp also examined gamma wave activity, showing how stimuli seemed to be in accordance with preattentive binding.

By contrast with this, another group of scientists (Treisman & Gelade) believed that the mechanisms did not work preattentively. They postulated that in order to make correct bindings there had to be attention. Hence, they called their theory "attentional binding." The idea of attentional binding is that, as someone places their attention on an object with multiple features, they develop over time a coherent representation of that object and the characteristics that it holds. These characteristics, after being processed through attention, can be stored in short-term memory or as episodic memories.

See all
User Avatar
No comments yet.