All are typical intercostal nerves except
Upper two intercostal nerves also supply the upper limb,third to sixth supply only the thoracic wall.so they are called typical intetcostal nerves. . B D CHAURASIA&;S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME-1 SIXTH EDITION Page no:217
2nd
3rd
4th
5th
Thorax