Q. With regard to the cutaneous innervation of the thorax and abdomen: (Solved)
1. above the 2nd rib, the skin is supplied by the cervical plexus (C4)
2. loss of a single spinal segment will produce a sensory deficit
3. it is supplied segmentally by the anterior primary rami of T1 to L1
4. T8 supplies skin at the level of the umbilicus
5. the lower eight thoracic nerves pass beyond the costal margin to supply the skin of the abdominal wall
- a. above the 2nd rib, the skin is supplied by the cervical plexus (C4)