Lecture 11 Nerve Palsies in the Limbs

Question 1

What is the floor of the carpal tunnel

Answer 1

Carpal bones

Question 2

What is the roof of the carpal tunnel

Answer 2

Flexor retinaculum

Question 3

What are the contents of the carpal tunnel

Answer 3

Flexor digitorum superficialis (4)
Flexor digitorum profundus (4)
Flexor pollicis longus (1)
Median nerve

9 Tendons and a nerve

Question 4

What are the causes of Carpal Tunnel Syndrome

Answer 4

Developmental (born with tunnel too tight)
Trauma
Swellings (ganglion, fibroma, lipoma)
Inflammatory (rheumatoid, gout, TB)
Metabolic (Pregnancy, hypothyroidism)

Question 5

Name 2 clinical features of carpal tunnel syndrome

Answer 5

Nocturnal pain
Parasthesia in part or all of the median nerve distribution
Wasting of the thenar muscles

Question 6

How is carpal tunnel syndrome diagnosed

Answer 6

Thenar wasting
Previous scars
Deformity
sensation
APB power
Special tests: Tinnels, Phalens

Question 7

What are the symptoms of Cubital Tunnel Syndrome

Answer 7

Numbness on ulnar side of hand and difficult with fine tasks

Question 8

What is the Froment’s test used to diagnose

Answer 8

Ulnar nerve palsy. If the ulnar nerve is not working the patient will cheat and use FPL instead of adductor pollicies

Question 9

What are the roots of sciatic nerve

Answer 9

L4-S3

Question 10

What is the main branch of the sacral plexus

Answer 10

Sciatic nerve

Question 11

Where does the sciatic nerve exit from

Answer 11

Exits pelvis through sciatic foramen below performs muscle

Question 12

What are the roots of the common fibular nerve

Answer 12

Rotts: L4-S2