Thoracic Nerves

Question 1

How many thoracic nerves are there?

Answer 1

12 pairs

Question 2

Each thoracic nerve divides into a ______ and _______ _______

Answer 2

Posterior and anterior primary Ramus

Question 3

Posterior primary ramus projects posterior and divides into _____ and ______ branch

Answer 3

Medial and lateral

Question 4

The medial branch of the posterior primary ramus of thoracic nerves have ______ function to what 3 muscles?

Answer 4

Motor

1. Semispinalis
2. Longissimus
3. Multifidi

Question 5

What specifically supply motor to the semispinalis, longissimus, and multifidi?

Answer 5

The medial branch of the posterior ramus (of a thoracic nerve)

Question 6

The lateral branches of the posterior primary ramus of a thoracic nerve have a ______ function to what 3 muscles?

Answer 6

Motor

1. Longissimus
2. Iliocostalis
3. Levator costarum

Question 7

What supplies motor function to the longissimus, iliocostalis, and levator costarum?

Answer 7

The lateral branches of the posterior primary ramus of thoracic nerves

Question 8

The medial branches of the posterior primary ramus of a thoracic nerve has sensory supply to what?

Answer 8

Skin paraspinally

Question 9

What supplies the skin paraspinally

Answer 9

The medial branch of the posterior primary ramus of a thoracic nerve

Question 10

The lateral branch of the posterior primary ramus of a thoracic nerve has sensory supply to what?

Answer 10

Skin near the costal angles?

Question 11

What supplies the skin near the costal angles

Answer 11

The lateral branch of the posterior primary ramus of a thoracic nerve

Question 12

Anterior primary rami of a thoracic nerve follow the course of the ______ above/below the ______

Answer 12

Rib

Above

Question 13

The anterior primary ramus of ____ contributes to the brachial plexus and a smaller branch forms the _____ _______ nerve

Answer 13

T1

1st intercostal

Question 14

The anterior primary ramus if _____ and ____ (sometimes) contribute to the __________ nerve

Answer 14

T2, (T1)

Intercostobrachial nerve

Question 15

Each intercostal nerve gives off a _____ _______ branch that divides into _____ and ______ branches

Answer 15

Lateral cutaneous

Anterior and posterior

Question 16

What is the terminating branch of the intercostal nerves and what does it supply?

Answer 16

Anterior cutaneous branches

Skin close to midline

Question 17

What supplies the skin close to midline

Answer 17

The anterior branch of the lateral cutaneous branch (a branch off the intercostal nerve)

Question 18

Intercostal nerves give off muscular branches to supply 5 muscles that have supply over all 12 ribs. What are they?

Answer 18

1. /2. Internal/external intercostal
2. Innermost intercostal
3. Serrated posterior
4. Trasversus thoracis

Question 19

Intercostal nerves give off muscular branches that supply muscles that are located rib 7-11. What are these 4 muscles?

Answer 19

1. Transverse abdominal
2. /3. Internal/external abdominal oblique
3. Rectus abdominus

Question 20

Intercostal nerves will also supply adjacent ______ ____, _____, ____ and _____

Answer 20

Blood vessels, bones, joints, ligaments

Question 21

What is the largest thoracic nerve?

Answer 21

Subcostal (t12)

Question 22

The subcostal nerve, the largest thoracic nerve, gives contributions to the _____ _____

Answer 22

Lumbar plexus

Question 23

What does the subcostal nerve (t12) supply?

Answer 23

Skin as far inferior and the superior buttock

Question 24

How does each thoracic nerve communication with the sympathetic trunk?

Answer 24

White and gray rami communicans