unit 6: thoracic spinal nerves Flashcards
there are __ pairs of thoracic nerves roots, each mixed that divides into a __ & ___ primary ramus
12
posterior
anterior
the post primary ramus projects posteriorward and divides into a __ & __ branch
medial
lateral
the ___ branches of the PPR have motor AND sensory function
medial
three muscles supplied by the PPR medial branches
semispinalis (t1-t6)
longissimus (t7-t12)
multifidi
the PPR medial branches provide sensory supply to the skin ____
paraspinally
the ___ branches of the PPR increase in size from ___ to ___ and have both motor and sensory
lateral
superior
Inferior
three muscles supplied by the lateral branches of the PPR
longissimus
iliocostalis
levator costarum
the LATERAL branch of the PPR provide sensory supply to the skin near the
costal angles
the ANTERIOR primary rami generally follows the course of the rib ___ the nerve
above
the APR of T1 will contribute to the __ __, a smaller branch will form the first ___ nerve
brachial plexus
intercostal
the APR of T2 and sometimes T1 contribute to the ____ nerve
intercostobrachial
each intercostal nerve gives off a ___ ___ branch, which divides into an anterior and posterior branch, which supplies the overlying skin
lateral cutaneous
intercostal nerves terminate as ___ ___ branches which supply the skin close to MIDLINE
anterior cutaneous
muscular branches from the ____ nerves supply:
- internal & external intercostals
- serratus posterior
- transversus thoracis
- transverse abdominal
- internal & external obliques
- rectus abdominus
intercostal
the ___ nerves also supply adjacent BV, bones, joints, ligaments
intercostal
