Orbitofrontal artery

Orbitofrontal Artery

The orbitofrontal artery is a branch of the anterior cerebral artery, which supplies blood to the orbitofrontal cortex of the brain. This artery plays a crucial role in delivering oxygenated blood to the frontal lobe regions involved in decision making, reward processing, and social behavior.

Diagram showing the orbitofrontal artery branching from the anterior cerebral artery.

Anatomy

The orbitofrontal artery typically arises from the A2 segment of the anterior cerebral artery. It courses anteriorly and inferiorly towards the orbitofrontal cortex, which is located on the ventral surface of the frontal lobe. The artery supplies the medial and inferior surfaces of the frontal lobe, including the gyrus rectus and the orbital gyri.

Function

The primary function of the orbitofrontal artery is to supply blood to the orbitofrontal cortex. This region of the brain is involved in various cognitive processes, including:

• Decision making
• Reward processing
• Emotional regulation
• Social behavior

The orbitofrontal cortex integrates sensory information with reward values, which is essential for adaptive decision-making and behavior.

Clinical Significance

Damage or occlusion of the orbitofrontal artery can lead to deficits in the functions of the orbitofrontal cortex. Such deficits may manifest as:

• Impaired decision making
• Altered social behavior
• Emotional dysregulation

In some cases, lesions in the orbitofrontal cortex due to vascular issues can result in orbitofrontal syndrome, characterized by disinhibition, impulsivity, and socially inappropriate behavior.

Related pages

• Anterior cerebral artery
• Orbitofrontal cortex
• Cerebral circulation
• Frontal lobe