Q. In the deepest intercostal muscle layer: (Solved)
1. the subcostals line the rib cage at the side
2. fibres of the innermost intercostal group only span one intercostal space
3. fibres of the subcostals group only span one intercostal space
4. transversus thoracis fibres only arise from 2nd to 6th costal cartilages
5. the border of the subcostal muscle group meets the innermost intercostal groups, overlapping slightly so the intercostal artery can slip between them to join the intercostal nerve
- d. transversus thoracis fibres only arise from 2nd to 6th costal cartilages