Radial Nerve Pathway

Question 1

Where does the Radial nerve pathway originate (exit SC)?

3

Answer 1

THROUGH POSTERIOR CORD
of 
BRACHIAL PLEXUS
from
C5 - T1

Question 2

Describe how the radial nerve exits with the brachial plexus through the anterior and middle scalenes?
(4)

Answer 2

UNDER CLAVICLE
\+
OVER 1ST RIB
\+
UNDER PEC MINOR
(landmark rib 3 or coracoid process)
\+
EXITS THROUGH TRIANGULAR SPACE TO AXILLA
(teres minor, triceps L. H., humerus)

Question 3

Name the complete list of where the Radial nerve travels?

5

Answer 3

1. AROUND LATERAL SIDE OF ARM
2. AROUND THE RADIAL/SPIRAL GROOVE OF HUMERUS
3. THROUGH THE 2 HEADS OF SUPINATOR
4. TOWARDS THE STYLOID PROCESS
5. TO 2 BRANCHES IN THE FOREARM

Question 4

Name the first 3 steps of where the Radial nerve travels?

Answer 4

1. AROUND LATERAL SIDE OF ARM
2. AROUND THE RADIAL/SPIRAL GROOVE OF HUMERUS
3. THROUGH THE 2 HEADS OF SUPINATOR

Question 5

Name the final 2 steps of where the Radial nerve travels?

Answer 5

4. TOWARDS THE STYLOID PROCESS

5. TO 2 BRANCHES IN THE FOREARM

Question 6

What do the 2 branches of the Radial nerve innervate?

Answer 6

THE SUPINATOR BRANCH:
provides only SENSORY INFO TO BACK OF HAND

THE DEEP BRANCH:
provides MOTOR FX TO EXTENSORS, WRIST + FINGERS

Question 7

What are 3 entrapment sites of the Radial N?

Answer 7

AXILLA
\+
TRICEPS
\+
SUPINATOR