1. STELLATE GANGLION: in the neck; as local anaesthetic spreads, a hoarse voice may occur; mild Horner's syndrome is common. This block has been used for upper limb Raynaud's, Meniere's syndrome, shingles and facial pain.
2. CELIAC PLEXUS BLOCK: solar plexus; has been used in acute pancreatitis as well as pancreatic cancer; abdominal pain.
3. LUMBAR SYMPATHETIC BLOCK: at L2-4; used in renal colic, urinary/pelvic pain, phantom limb pain etc.
4. SUPERIOR HYPOGASTRIC PLEXUS: lumbar sympathetic chains, and sacral parasympathetics: innervates the pelvic organs including the genitals and the colon; used to treat visceral pelvic pain.
5. GANGLION IMPAR BLOCK: paired sympathetic chains terminate here at the sacrococcygeal junction; used to treat perineal pain.
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