Cingulate Gyrus

What is the Cingulate Gyrus?

The cingulate gyrus is a curved band of cerebral cortex on the brain's medial surface, above the corpus callosum. Often discussed as part of the limbic system, its subregions contribute to pain, emotion, attention, memory, and decision-making through different connections with the rest of the brain.

Anatomy

• Where is the Cingulate Gyrus?

  The cingulate gyrus is situated above the corpus callosum, a bundle of nerve fibers connecting the two hemispheres of the brain. It is part of the cingulate cortex, which consists of the cingulate gyrus and the adjacent medial cortex.

• Subdivisions

  A four-region model of the cingulate cortex distinguishes the anterior cingulate cortex (ACC), the midcingulate cortex (MCC), the posterior cingulate cortex (PCC), and the retrosplenial cortex (RSC). Each of these regions has unique functional roles and connectivity patterns within the brain.

Functions of the Cingulate Gyrus

• Pain Perception

  The cingulate gyrus, particularly the anterior cingulate cortex, plays a crucial role in the perception of pain, including both physical and emotional aspects. It helps process the unpleasantness of pain and contributes to the emotional response associated with it.

• Emotion Regulation

  As part of the limbic system, the cingulate gyrus is involved in regulating emotions. The anterior cingulate cortex is specifically implicated in emotional processing, including the regulation of negative emotions such as fear and anxiety.

• Attention and Cognitive Control

  Anterior and midcingulate regions contribute to attention and cognitive control within wider networks. These regions contribute to detecting conflict, monitoring errors, and adjusting behavior after feedback.

• Memory

  The posterior cingulate and retrosplenial regions contribute to spatial and episodic memory, including retrieving information about places and past experiences.

Associated Disorders

• Depression

  Abnormalities in the cingulate gyrus, particularly in the anterior cingulate cortex, have been associated with major depressive disorder. Functional and structural changes in this region may contribute to the symptoms of depression, such as emotional dysregulation and cognitive deficits.

• Anxiety

  Increased activity in the cingulate gyrus, especially the anterior cingulate cortex, has been linked to anxiety disorders. Such activity differences are associations whose interpretation depends on the task, subregion and patient group; they do not by themselves establish the cause of anxiety.

• Obsessive-Compulsive Disorder

  Individuals with obsessive-compulsive disorder (OCD) often exhibit hyperactivity in the anterior cingulate cortex. This may be related to the repetitive thoughts and behaviors characteristic of the disorder, as well as the difficulty in suppressing unwanted thoughts or actions.

• Alzheimer's Disease

  Early stages of Alzheimer's disease are often marked by reduced metabolism and functional connectivity in the posterior cingulate cortex and the retrosplenial cortex. These changes have been linked to the memory impairments and cognitive decline associated with the disease.

• Attention-Deficit/Hyperactivity Disorder

  Altered function and structure of the cingulate gyrus, particularly the anterior cingulate cortex, have been implicated in attention-deficit/hyperactivity disorder (ADHD). These abnormalities may contribute to the difficulties in attention regulation, impulsivity, and executive function observed in individuals with ADHD.

Sources and evidence

• Brent A. Vogt: Pain and emotion interactions in subregions of the cingulate gyrus. Pain, affect and cognition involve distributed networks rather than a single uniform cingulate function.
• Bush G, Luu P, Posner MI.: Cognitive and emotional influences in anterior cingulate cortex.. Activation differences alone are not diagnostic or causal evidence.