The human orbitofrontal cortex, vmPFC, and anterior cingulate cortex effective connectome: emotion, memory, and...

Area of Science:

• Neuroscience
• Cognitive Neuroscience

Background:

• The orbitofrontal cortex (OFC), ventromedial prefrontal cortex (vmPFC), and anterior cingulate cortex are crucial for reward processing, emotion, and episodic memory.
• Understanding the intricate connections of these regions is vital for deciphering their roles in cognition and behavior.

Purpose of the Study:

• To comprehensively map the effective connectivity of the human orbitofrontal cortex with cortical and subcortical regions.
• To elucidate the OFC's role in integrating sensory information for reward processing, memory, and navigation.

Main Methods:

• Utilized effective connectivity analysis across 360 cortical and 24 subcortical regions in 172 participants from the Human Connectome Project.
• Complemented effective connectivity with functional connectivity and diffusion tractography data.

Main Results:

• The OFC receives input from gustatory, olfactory, and visual/auditory temporal areas.
• Established OFC connections to the cingulate cortex and hippocampal system, supporting reward-guided memory and navigation.
• Detailed pathways for action-outcome learning, including responses to aversive stimuli, and OFC outputs to language and cholinergic systems.

Conclusions:

• The OFC plays a central role in linking sensory information to reward, emotion, memory, and goal-directed behavior.
• Connectivity patterns highlight the OFC's integration of sensory, emotional, and mnemonic information.
• Disruptions in OFC connectivity, particularly cholinergic pathways, may underlie memory impairments.