Callosomarginal artery

Looks like

A main branch of the anterior cerebral artery running along the groove above the corpus callosum, on the brain's inner surface; absent in some people.

What it does

Supplies the inner surface of the frontal lobe, including the leg area of the motor strip, through its frontal and paracentral branches.

Keeping it well

Its blockage causes weakness of the opposite leg. It is mapped in surgery near the midline.

Related conditions

• Brain aneurysm
• Carotid artery stenosis
• High blood pressure
• High cholesterol
• Hypothermia & frostbite
• Ischaemic stroke
• Kawasaki disease
• Metabolic syndrome
• Orthostatic hypotension & POTS
• Peripheral artery disease
• Phaeochromocytoma & hyperaldosteronism
• Pre-eclampsia
• Raynaud's phenomenon
• Retinal artery occlusion (eye stroke)
• Sepsis
• Shock (circulatory failure)
• Takayasu arteritis
• Transient ischaemic attack
• Vasculitis (GCA & others)