Preston Question Book Flashcards
Which of the following is TRUE regarding the brachial plexus?
A. There are three trunks: lateral, medial, and posterior.
B. Each trunk divides into three divisions.
C. All major upper extremity nerves originate from the trunks.
D. The trunks are formed by the anterior rami of C5-T1.
E. The cords form proximal to the level of the clavicle.
D. The trunks are formed by the anterior rami of C5-T1
Which of the following muscles would be affected by a C5 radiculopathy but not an upper trunk lesion of the brachial plexus?
A. Rhomboids
B. Supraspinatus
C. Infraspinatus
D. Biceps
E. Clavicular head of pectoralis major
A. Rhomboids
Which of the following is NOT associated with an upper trunk lesion of the brachial plexus?
A. Burner or stinger syndrome from contact sports
B. Pancoast tumor
C. Trauma
D. Penetrating injury
E. Obstetrical injury
Which of the following is NOT associated with an upper trunk lesion of the brachial plexus?
A. Burner or stinger syndrome from contact sports
B. Pancoast tumor
C. Trauma
D. Penetrating injury
E. Obstetrical injury
Which of the following is NOT associated with an upper trunk lesion of the brachial plexus?
A. Burner or stinger syndrome from contact sports
B. Pancoast tumor
C. Trauma
D. Penetrating injury
E. Obstetrical injury
Which of the following muscles is affected in a middle trunk but not in a posterior cord lesion of the brachial plexus?
A. Teres minor
B. Brachioradialis
C. Triceps
D. Pronator teres
E. Abductor pollicis brevis
Which of the following muscles is affected in a middle trunk but not in a posterior cord lesion of the brachial plexus?
A. Teres minor
B. Brachioradialis
C. Triceps
D. Pronator teres
E. Abductor pollicis brevis
Q8. Which of the following muscles would be affected by a median nerve lesion in the forearm but not a carpal tunnel syndrome?
A. Flexor carpi ulnaris
B. Flexor carpi radialis
C. Abductor pollicis longus
D. Adductor pollicis
E. Opponens pollicis
A 35-year-old man develops weakness of right thumb flexion at the interphalangeal joint. In addition, he cannot flex the index and middle fingers at the distal interphalangeal joints. However, the ring and little fingers are normal, and there is no sensory loss. What is the other muscle most likely to be affected?
A. Abductor pollicis brevis
B. Flexor carpi radialis
C. Flexor digitorum superficialis
D. Pronator teres
E. Pronator quadratus
Q10. A 44-year-old woman develops weakness of the right hand for 6 weeks. Electromyography (EMG) examination of which of the following muscles is useful to differentiate a median nerve lesion from a C8 nerve root lesion?
A. Abductor pollicis brevis
B. Opponens pollicis
C. Flexor pollicis longus
D. Flexor digitorum profundus of the index finger
E. Extensor indicis proprius
In a severe ulnar nerve lesion at Guyon’s canal, which of the following clinical findings is MOST LIKELY to be PRESENT?
A. Intact sensation over the distal medial palm
B. Intact sensation over the medial side of the dorsum of the hand
C. Intact sensation over the little finger
D. Intact posture of the little and ring fingers
E. Normal abduction of the index finger
Which of the following upper extremity muscles has a dual nerve supply?
A. Flexor digitorum superficialis
B. Flexor pollicis brevis
C. Flexor pollicis longus
D. Opponens pollicis
E. Dorsal interossei
A patient presents with a wrist and finger drop. Which muscle would be affected by a radial neuropathy but not a posterior interosseous neuropathy?
A. Extensor digitorum indicis
B. Extensor digitorum communis
C. Extensor carpi ulnaris
D. Abductor pollicis longus
E. Brachioradialis
A 50-year-old man has weakness and atrophy of the left infraspinatus, but the left supraspinatus is normal. What is the most likely location of the lesion?
A. Suprascapular notch
B. Superior transverse scapular ligament
C. Anterior coracoscapular ligament
D. Spinoglenoid notch
E. Neck of the humerus
Which of the following muscles would be affected by a lumbosacral trunk but not a sciatic nerve lesion?
A. Iliacus
B. Tensor fascia latae
C. Adductor longus
D. Medial hamstrings
E. Short head of the biceps femoris
A 65-year-old man develops weakness of the right leg after he undergoes coronary angiography for evaluation of chest pain. Examination reveals weakness of right knee extension. Which of the following muscles would be affected by a lumbar plexus lesion but not a femoral nerve lesion?
A. Iliacus
B. Adductor longus
C. Gluteus medius
D. Quadriceps
E. Hamstrings
A 65-year-old man presents with weakness of the right leg after surgical repair of a right inguinal hernia. Examination demonstrates weakness of right knee extension. Which of the following skin areas of the right lower extremity is most likely to reveal sensory impairment?
A. Medial lower leg
B. Lateral lower leg
C. Dorsum of the foot
D. Lateral aspect of the foot
E. Sole
The tibial division of the sciatic nerve innervates the:
A. tibialis anterior.
B. adductor magnus.
C. peroneus longus.
D. peroneus brevis.
E. adductor longus.
A 23-year-old man presents with the left foot drop. To differentiate an L5 radiculopathy from a peroneal neuropathy, which of the following muscle testing would be useful?
A. Hip extension
B. Hip internal rotation
C. Knee extension
D. Knee flexion
E. Plantar flexion
A 45-year-old woman presents with right foot drop. Which of the following muscles on needle electromyography (EMG) would be affected by a sciatic nerve lesion but not a common fibular (peroneal) nerve lesion around the fibular neck?
A. Extensor hallucis longus
B. Peroneus longus
C. Short head of biceps femoris
D. Gluteus medius
E. Tensor fascia latae
Which of the following muscles is supplied by the superficial fibular (peroneal) nerve?
A. Tibialis anterior
B. Extensor hallucis longus
C. Extensor digitorum brevis
D. Peroneus brevis
E. Peroneus tertius
A 33-year-old woman presents with numbness of the lateral lower leg for one week. Which of the following diagnoses is LEAST likely?
A. L5 radiculopathy
B. Sciatic neuropathy
C. Common fibular (peroneal) neuropathy
D. Isolated superficial fibular (peroneal) neuropathy
E. Isolated deep fibular (peroneal) neuropathy
The sural communicating nerve:
A. is also known as the medial sural nerve.
B. is also known as the tibial communicating nerve.
C. originates from the common fibular (peroneal) nerve.
D. originates from the superficial fibular (peroneal) nerve.
E. originates from the deep fibular (peroneal) nerve.
Rhomboids are supplied by which nerve
dorsal scapular (C5)
Affected in C5 radic but not not upper trunk
Rhomboids
supraspinatus and infraspinatus are supplied by
suprascapular nerve (C5)
