5. Peripheral Neuropathies.

***) All of the following can cause peripheral neuropathy, except:

1. Lead poisoning

2. Diphtheria

3. Guillain-Barr syndrome

4. Vitamin B₁₂ deficiency

5. Vitamin C deficiency

Answer: E* Vitamin C deficiency

***) Causes of peripheral neuropathy include all of the following, except:

1. Diabetes mellitus

2. AIDS

3. B₁₂ deficiency

4. Systemic lupus erythematosus

5. Iron deficiency anemia

Answer: E* Iron deficiency anemia

***) Causes of mononeuritis multiplex include all of the following, except:

1. Sarcoidosis

2. Diabetes mellitus

3. Polyarteritis nodosa

4. Rheumatoid arthritis

5. Vitamin B₁₂ deficiency

Answer: E* Vitamin B₁₂ deficiency

***) In carpal tunnel syndrome the nerve compressed is the: Q2012

1. Ulnar

2. Radial

3. Median

4. Musculocutaneous

5. Posterior interosseous

Answer: C* Median

***) In carpal tunnel syndrome the nerve compressed is the:

1. Ulnar

2. Radial

3. Median

4. Musculocutaneous

5. Posterior interosseous

Answer: C* Median

***) Regarding carpal tunnel syndrome which is the true statement:

1. It is the most common peripheral nerve entrapment syndrome

2. Typical symptoms consist of dysesthesias, weakness, and decreased sensation

3. The area over the median nerve at the wrist produces paresthesia in the median nerve

4. Other muscles that show some weakness include the lateral two lumbricals

5. All of the above

Answer: E* All of the above

***) Causes of carpal tunnel syndrome occur in all of the following, except:

1. Primary amyloidosis

2. Myxedema

3. Rheumatoid arthritis

4. May be idiopathic

5. Ankylosing spondylitis

Answer: E* Ankylosing spondylitis

***) Causes of carpal tunnel syndrome include all of the following, except:

1. Pregnancy

2. Myxedema

3. Multiple sclerosis

4. Acromegaly

5. Rheumatoid arthritis

Answer: C* Multiple sclerosis

***) The skin overlying the hypothenar muscle of the palm is supplied by the:

1. Radial nerve

2. Median nerve

3. Ulnar nerve

4. Anterior interosseous nerve

5. Superficial radial nerve

Answer: C* Ulnar nerve

***) Partial clawing of the hand is the manifestation of injury one of the following:

1. Ulnar nerve

2. Radial nerve

3. Median nerve

4. Anterior interosseous nerve

5. Musculocutaneous nerve

Answer: A* Ulnar nerve

***) A patient presents with wasting of small muscles of hand with thenar sprain. What is the most probable nerve could be affected:

1. Ulnar nerve

2. Median nerve

3. Axillary nerve

4. Musculocutaneous nerve

5. Thenar nerve

Answer: A* Ulnar nerve

***) Regarding Erb's palsy all is true except:

1. It is an injury to the upper brachial plexus (C5 - C6)

2. Usually results from separation or stretch of the neck and shoulder

3. Distal strength in the upper extremity is always reduced

4. The arm may be held in adduction with the fingers pointing backward

5. C5 & C6 dermatomes reduced sensation and paralysis of scapular muscles

Answer: C* Distal strength in the upper extremity is always reduced

6. Myasthenia Gravis.

***) The lesion of myasthenia gravis is in the:

1. Anterior horn cell

2. Neuromuscular junction

3. Sensory ganglia

4. Parasympathetic ganglia

5. Sympathetic chain

Answer: B* Neuromuscular junction

***) All of the following about myasthenia gravis are true, except:

1. Causes ptosis

2. Weakness is usually proximal

3. Recognized cause of respiratory failure

4. Anticholinesterase therapy is harmful

5. Can cause bulbar muscle weakness

Answer: D* Anticholinesterase therapy is harmful

***) All of the following features of myasthenia gravis are true, except:

1. Asymmetrical weakness

2. Associated with thyrotoxicosis

3. Dysphagia

4. Absence reflexes

5. Natural remission

Answer: D* Absence reflexes

***) The surgical treatment of myasthenia gravis is:

1. Bilateral adrenalectomy

2. Hypophysectomy

3. Thymectomy

4. Total thyroidectomy

5. Splenectomy

Answer: C* Thymectomy