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Association Areas of the Cortex

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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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Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

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Action-specific feature processing in the human cortex: An fMRI study.

Simona Monaco¹, Nicholas Menghi², J Douglas Crawford³

¹CIMeC - Center for Mind/Brain Sciences, University of Trento, Rovereto (TN), Italy.

Neuropsychologia

|December 24, 2023

Summary

This summary is machine-generated.

Intended manual actions, like grasping, influence visual processing early in the brain. This top-down modulation affects the primary visual cortex and dorsal stream, preparing the brain for action.

Keywords:

Action Psychophysiological interactions Top-down processing Whole brain fMRI

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Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis

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Area of Science:

Neuroscience
Cognitive Science
Visual Perception

Background:

Sensorimotor integration relies on both feedforward and reentrant processing.
Top-down modulation of visual processing by action intentions is less understood than perceptual feedback.
The neural circuits underlying action-specific visual processing require further investigation.

Purpose of the Study:

To investigate whether action-specific intentions influence visual information processing in the human cortex.
To identify the timing and neural regions involved in action-modulated visual processing.
To explore the functional connectivity related to preparing for specific manual actions.

Main Methods:

Functional magnetic resonance imaging (fMRI) using a cue-separation paradigm.
Presentation of oriented visual stimuli.
Analysis of brain activity and functional connectivity related to distinct action instructions (manual alignment vs. grasp).

Main Results:

Action-specific processing (manual alignment vs. grasp) emerged after visual stimulus presentation.
Modulations were observed early in the primary visual cortex and extended through the dorsal visual stream, motor, and premotor areas.
The anterior intraparietal sulcus (aIPS) and primary visual cortex exhibited task-related functional connectivity with frontal, parietal, and temporal areas.

Conclusions:

Intended manual actions exert an early and pervasive influence on cortical visual processing.
Reentrant feedback from dorsal and ventral visual streams modifies visual input to prepare for action.
These findings highlight the crucial role of action goals in shaping visual perception.