The stellate ganglion is formed by the inferior cervical and first thoracic ganglia and is located just anterior to the head of the first rib. It receives input from the paravertebral sympathetic chain and provides sympathetic efferents to the upper limbs, head, neck, and heart.
The stellate ganglion is a long, flat structure approximately 1 cm in length. It lies just anterior to the head of the first rib, directly adjacent to the vertebral artery and lateral to the longus colli muscle. It is also closely related to the apex of the lung and the phrenic nerve.