Neuropathy vs Myopathy

Question 1

What is this a presentation of?

Proximal weakness, weakness > wasting, reflexes normal, sensation normal, creatine kinase high.

Answer 1

Muscle disease (myopathy)

Question 2

What is this a presentation of?
Fatigable weakness, proximal > distal, extraocular muscles and face often involved, reflexes normal, sensation normal, creatine kinase normal.

Answer 2

Neuromuscular junction disease

Question 3

What is this a presentation of?
Weakness distally, early wasting, reflexes reduced/absent, sensory/autonomic can be involved, may be pain, creatine kinase may be elevated.

Answer 3

Peripheral neuropathy