<s>[INST] context: Stellate ganglion: - It is basically inferior cervical ganglion fused with upper thoracic ganglion. Shape - star shaped Located at - Between cervico- thoracic (C7 - T1) veebra - Related to neck of first rib. - Related to anterior tubercle on C7 veebra. Applied aspect: - Stellate ganglion block - Required in case of - I. Raynaud's phenomenon II. Post herpetic pain III. phantom limb pain - Stellate ganglion is blocked bit higher than its location. Why not C6 - T1? Trachea - medial to stellate ganglion (begin C6) Cupula (apex) of lung - is very close to lung at cervico - thoracic region Veebral aery - also passing from there. Blocking C6 T1 can lead to- I. Pneumothorax II. Bleeding d/t veebral aery. - Therefore, to block stellate ganglion go a bit higher. Chassaignac's tubercle - anterior tubercle of C6 veebra. - That is where stellate ganglion is blocked. Note - Don't go posterior to it because brachial plexus can get blocked. Relations: - Carotid sheath - stellate ganglion lies postero medial to carotid sheath Trachea - medial to stellate ganglion Pre veebral fascia - posterior to stellate ganglion. [/INST] question: Stellate ganglion is located:- | options: A: Posterior to preveebral fascia B: Posterior to trachea C: Anterior to transverse process of C6 D: Anterior to transverse process of C7 | answer: D </s>