Thoracic Nerves Flashcards
How many thoracic nerves are there?
12 pairs
Each thoracic nerve divides into a ______ and _______ _______
Posterior and anterior primary Ramus
Posterior primary ramus projects posterior and divides into _____ and ______ branch
Medial and lateral
The medial branch of the posterior primary ramus of thoracic nerves have ______ function to what 3 muscles?
Motor
- Semispinalis
- Longissimus
- Multifidi
What specifically supply motor to the semispinalis, longissimus, and multifidi?
The medial branch of the posterior ramus (of a thoracic nerve)
The lateral branches of the posterior primary ramus of a thoracic nerve have a ______ function to what 3 muscles?
Motor
- Longissimus
- Iliocostalis
- Levator costarum
What supplies motor function to the longissimus, iliocostalis, and levator costarum?
The lateral branches of the posterior primary ramus of thoracic nerves
The medial branches of the posterior primary ramus of a thoracic nerve has sensory supply to what?
Skin paraspinally
What supplies the skin paraspinally
The medial branch of the posterior primary ramus of a thoracic nerve
The lateral branch of the posterior primary ramus of a thoracic nerve has sensory supply to what?
Skin near the costal angles?
What supplies the skin near the costal angles
The lateral branch of the posterior primary ramus of a thoracic nerve
Anterior primary rami of a thoracic nerve follow the course of the ______ above/below the ______
Rib
Above
The anterior primary ramus of ____ contributes to the brachial plexus and a smaller branch forms the _____ _______ nerve
T1
1st intercostal
The anterior primary ramus if _____ and ____ (sometimes) contribute to the __________ nerve
T2, (T1)
Intercostobrachial nerve
Each intercostal nerve gives off a _____ _______ branch that divides into _____ and ______ branches
Lateral cutaneous
Anterior and posterior
What is the terminating branch of the intercostal nerves and what does it supply?
Anterior cutaneous branches
Skin close to midline
What supplies the skin close to midline
The anterior branch of the lateral cutaneous branch (a branch off the intercostal nerve)
Intercostal nerves give off muscular branches to supply 5 muscles that have supply over all 12 ribs. What are they?
- /2. Internal/external intercostal
- Innermost intercostal
- Serrated posterior
- Trasversus thoracis
Intercostal nerves give off muscular branches that supply muscles that are located rib 7-11. What are these 4 muscles?
- Transverse abdominal
- /3. Internal/external abdominal oblique
- Rectus abdominus
Intercostal nerves will also supply adjacent ______ ____, _____, ____ and _____
Blood vessels, bones, joints, ligaments
What is the largest thoracic nerve?
Subcostal (t12)
The subcostal nerve, the largest thoracic nerve, gives contributions to the _____ _____
Lumbar plexus
What does the subcostal nerve (t12) supply?
Skin as far inferior and the superior buttock
How does each thoracic nerve communication with the sympathetic trunk?
White and gray rami communicans
