Stellate ganglion block supplies sympathetic fibers to which regions?

Stellate ganglion block supplies sympathetic fibers to which regions?

• A. Lower extremity
• B. Upper extremity and head
• C. Abdomen
• D. Chest wall

Answer: (B)

The main idea is the distribution of sympathetic fibers that travel with the stellate ganglion. The stellate ganglion is formed by the inferior cervical and first thoracic sympathetic ganglia and sits at the thoracic inlet. Blocking it interrupts postganglionic sympathetic fibers that go to the ipsilateral head, neck, and upper extremity. That makes sense for why this block is used to treat conditions affecting the arm and the face/neck region. The lower extremities and most of the abdomen are supplied by other sympathetic chains (lumbar and sacral), not the stellate, so they aren’t the primary targets of this block. The chest wall can be influenced to some extent by nearby thoracic sympathetic fibers, but the regions most consistently affected by a stellate ganglion block are the head/neck and the upper limb. If you see Horner’s syndrome after a block, that’s a helpful sign that the sympathetic chain on that side has been successfully affected.

The main idea is the distribution of sympathetic fibers that travel with the stellate ganglion. The stellate ganglion is formed by the inferior cervical and first thoracic sympathetic ganglia and sits at the thoracic inlet. Blocking it interrupts postganglionic sympathetic fibers that go to the ipsilateral head, neck, and upper extremity. That makes sense for why this block is used to treat conditions affecting the arm and the face/neck region. The lower extremities and most of the abdomen are supplied by other sympathetic chains (lumbar and sacral), not the stellate, so they aren’t the primary targets of this block. The chest wall can be influenced to some extent by nearby thoracic sympathetic fibers, but the regions most consistently affected by a stellate ganglion block are the head/neck and the upper limb. If you see Horner’s syndrome after a block, that’s a helpful sign that the sympathetic chain on that side has been successfully affected.