network of nerves formed by the ventral rami of the lower four cervical nerves and first
via Wikipedia infobox
The brachial plexus is a network of nerves (nerve plexus) formed by the anterior rami of the lower four cervical nerves and the first thoracic nerve (C5, C6, C7, C8, and T1). This plexus extends from the spinal cord, through the cervicoaxillary canal in the neck, over the first rib, and into the armpit. It supplies afferent and efferent nerve fibers to the chest, shoulder, arm, forearm, and hand.
Structure
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).