Hint | Answer |
serratus posterior superior: origin | C7-T3 spinous processes |
serratus posterior superior: insertion | superior borders of ribs 2-5 |
serratus posterior superior: action | elevates ribs |
serratus posterior superior: innervation | intercostal nerves |
serratus posterior inferior: origin | T11-L2 spinous processes |
serratus posterior inferior: insertion | inferior borders of ribs 8-12 |
serratus posterior inferior: action | depress ribs |
serratus posterior inferior: innervation | intercostal nerves |
levator costarum: origin | C7- T11 transverse processes |
levator costarum: insertion | superior borders of ribs below transverse process of origin |
levator costarum: action | elevate ribs |
levator costarum: innervation | dorsal primary rami |
external intercostals: origin | inferior borders of ribs |
external intercostals: insertion | superior borders of ribs below origin (fibers run inferoanteriorly) |
external intercostals: action | elevate ribs |
external intercostals: innervation | intercostal nerves |
internal intercostals: origin | inferior borders of ribs |
internal intercostals: insertion | superior borders of ribs below origin (fibers run inferoposteriorly) |
internal intercostals: action | depress ribs |
internal intercostals: innervation | intercostal nerves |
innermost intercostals: origin | inferior borders of ribs |
innermost intercostals: insertion | superior borders of ribs below origin (fibers run inferoposteriorly) |
innermost intercostals: action | depress ribs |
innermost intercostals: innervation | intercostal nerves |
transversis thoracis: origin | xiphoid process, sternum, costal cartilages |
transversis thoracis: insertion | costal cartilages 2-6 |
transversis thoracis: action | depress ribs |
transveris thoracis: innervation | intercostal nerves |
subcostals: origin | internal surface of lower ribs near their angles |
subcostals; insertion | superior borders of ribs below origin |
subcostals: action | elevate ribs |
subcostals: innervation | intercostal nerves |