All are typical intercostal nerves except
2nd
3rd
4th
5th
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
Thorax