"action: "
"origin: transverse processes of lower two or three cervical vertebrae (C5-C7)"
"insertion: outer surface of second rib"
"action: "
"nerve supply: ventral rami of cervical nerves C6-C8 from the cervical plexus"
"origin: transverse processes of lower two or three cervical vertebrae (C5-C7)"
"nerve supply: ventral rami of cervical nerves C6-C8 from the cervical plexus"