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Related Concept Videos

Brainstem: Control Centers of Medulla01:21

Brainstem: Control Centers of Medulla

The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
Functional Brain Systems: Reticular Formation01:13

Functional Brain Systems: Reticular Formation

The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Brainstem01:19

Brainstem

The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...

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Related Experiment Video

Updated: Jun 28, 2026

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
09:37

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

Published on: July 5, 2015

Challenge-driven attention: interacting frontal and brainstem systems.

Rajeev D S Raizada1, Russell A Poldrack

  • 1Institute for Learning and Brain Sciences, University of Washington Seattle, WA 98195, USA. raizada@u.washington.edu

Frontiers in Human Neuroscience
|October 30, 2008
PubMed
Summary
This summary is machine-generated.

This study reveals how the brain responds to unpredictable challenges. The brainstem and right frontal cortex work together, with the brainstem signaling difficulty and the frontal cortex allocating resources for cognitive control.

Keywords:
cognitive resourceslocus coeruleusnoradrenalineprefrontal cortex

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Systems Neuroscience

Background:

  • The neural basis for responding to unpredictable environmental challenges remains incompletely understood.
  • Understanding these systems is crucial for comprehending cognitive control and adaptation.

Purpose of the Study:

  • To investigate the neural mechanisms underlying responses to unpredictable task demands.
  • To identify brain regions involved in processing varying levels of challenge and unpredictability.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed to study brain activity during an audiovisual task.
  • Task parameters, including trial difficulty and onset times, were manipulated unpredictably.

Main Results:

  • Two key brain regions, the right frontal cortex and the brainstem, showed increased activation during challenging trials.
  • Right frontal cortex activation correlated with task difficulty, consistent with cognitive control roles.
  • Brainstem activation, observed in the most difficult trials, exhibited a phasic pattern similar to primate locus coeruleus activity.

Conclusions:

  • The findings suggest a collaborative role between the brainstem and right frontal cortex in managing attentional challenges.
  • The brainstem may act as a signal for attentional challenges, prompting the right frontal cortex to engage cognitive resources.
  • This research bridges findings from animal and human studies, offering insights into conserved neural mechanisms for challenge response.