Dermatomes + Referred pain + reflexes -- UL+LL

Question 1

Reflexes at the elbow joint

Answer 1

C6 - tap on the tendon of the biceps brachii muscle
C7 - tap on tendon of the triceps muscle

Question 2

What injury involves the common flexor origin?

Question 3

What is Golfer’s elbow

Question 4

Where do the dermatomes of the UL originate from?

Question 5

explain the mechanism of C4 dermatome referred pain

Question 6

where is the C5, C6, C7, C8 and T1 dermatome tested for sensation?

Question 7

What is the lumbosacral plexus made of (like which branches?)? where do the diff components of it lie?

Answer 7

Lumbar plexus:
- formed by the anterior rami of L1-L3 and part of L4
- located within the psoas major musc.

Lumbosacral Trunk:
- Formed by the remainder of the anterior rami of the L4 + anterior rami of L5

Sacral Plexus:
- The lumbosacral trunk enters the pelvis to join the anterior rami of S1-3 and part of S4 to form the sacral pexus
- Located on the posterolateral aspect of the wall of the pelvis

Question 8

What are the nerves that enter the lower limb terminal branches of?

Answer 8

The lumbosacral plexus

Question 9

draw dermatomes of LL

Question 10

Referred pain in relation to the obturator nerve?

Answer 10

• supplies hip and knee joints
  so hip disease pain felt in knee
• Supplies upper medial thigh
  so pain from pelvic inflammation felt here