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The medulla oblongata is the lower part of the brainstem that connects the brain to the spinal cord. It regulates vital automatic functions such as breathing, heart rate, blood pressure, and reflexes including swallowing and coughing.

The ventricular system is a network of interconnected cavities within the brain that contains and circulates cerebrospinal fluid (CSF)

A simplified neuron is shown, along with explanations of its various component parts.

Family and twin studies estimate recurrence risk and heritability, showing that anxiety disorders aggregate in families and have a moderate genetic component.

Suicidal ideation is far more common than attempts in people with anxiety or depression, especially with comorbid disorders and severe depression.

This analysis of the link between anxiety and disability used data from the NESDA study, including 1,826 people. All anxiety disorders were associated with disabilities in cognition, mobility, selfcare, social interaction, life activities, and participation.