Anatomy exam 1
A 32-year-old woman delivered a large baby after a difficult labor. At delivery,
the infant's head emerged, but the shoulders were "stuck" behind the maternal
symphysis pubis. Effort and maneuvers to free them up stretched the brachial
plexus. The infant was noted to have a good cry and color but was not moving
his right arm.
Which injured nerve is partially responsible for the baby inability to abduct,
flex and laterally rotate his right arm? - correct answer ✔axillary nerve
A young girl presents with a right small forearm and a weak grasp. On the
same side, you observed a dropping of the eyelid and constriction of the pupil.
Your exam should show: - correct answer ✔paralysis of palmar interossei
Following a knife wound to the neck, you notice that the medial border of a
patient's left scapula is located further from the midline than that of his right
scapula. The nerve most likely injured by the wound is the: - correct answer
✔dorsal scapular
A patient cannot raise his arm above the horizontal and exhibit the abnormal
condition shown in the following photograph. Which structure of the brachial
plexus would most likely damaged? - correct answer ✔roots
The suprascapular nerve may be trapped and compressed as it passes
through the spinoglenoid notch. The patient will have the most difficulty with -
correct answer ✔lateral rotation of the arm
Following a left radical mastectomy, a woman is unable to abduct her arm
more than 90 degrees. Which of the following structures do you suspect was
injured during the surgical procedure? - correct answer ✔long thoracic nerve
, After a penetrating wound in the area of the posterior axillary fold a patient
had weakness in extension and adduction of the arm. Which nerve is most
likely involved? - correct answer ✔thoracodoral nerve
During an axillary lymph node dissection, a resident cleans the space
between the pectoralis major and minor muscles, in an attempt to remove all
of the lateral pectoral lymph nodes. Upon recovery it is noted that the patient's
lower pectoralis major is paralyzed. The nerve most likely injured is the: -
correct answer ✔medial pectoral nerve
Damage to the posterior cord of the brachial plexus can affect the function of
the following muscles except - correct answer ✔pectoralis minor
A man is struck by the sharp edge of a metal panel across the anterior surface
of his right arm at midlength and the impact severs all of the tissue to the
bone. When examined in the emergency room it is noted that the patient can
only weakly flex his elbow and the lateral side of his forearm is numb. In
addition to the muscles, which nerve is injured? - correct answer
✔musculocutaneous
A 22-year-old man is involved in a motor vehicle accident. The patient
suffered multiple injuries including a displaced fracture of the left humerus. He
complains of an inability to open his left hand and loss of sensation on a
portion of his left hand. Name the diagnosis for this injury and explain its
mechanisms. - correct answer ✔Diagnosis: *Wrist drop* (no extension of
wrist )> hand is flexed because of damage to radial nerve in radial groove
A 34-year-old secretary complains of tingling of her right index and middle
fingers over 2 months' duration. She notes some weakness of her right hand
and has begun to drop items such as her coffee cup. Which of the intrinsic
muscles of the hand is paralyzed? - correct answer ✔lateral two lumbricals
A 32-year-old woman delivered a large baby after a difficult labor. At delivery,
the infant's head emerged, but the shoulders were "stuck" behind the maternal
symphysis pubis. Effort and maneuvers to free them up stretched the brachial
plexus. The infant was noted to have a good cry and color but was not moving
his right arm.
Which injured nerve is partially responsible for the baby inability to abduct,
flex and laterally rotate his right arm? - correct answer ✔axillary nerve
A young girl presents with a right small forearm and a weak grasp. On the
same side, you observed a dropping of the eyelid and constriction of the pupil.
Your exam should show: - correct answer ✔paralysis of palmar interossei
Following a knife wound to the neck, you notice that the medial border of a
patient's left scapula is located further from the midline than that of his right
scapula. The nerve most likely injured by the wound is the: - correct answer
✔dorsal scapular
A patient cannot raise his arm above the horizontal and exhibit the abnormal
condition shown in the following photograph. Which structure of the brachial
plexus would most likely damaged? - correct answer ✔roots
The suprascapular nerve may be trapped and compressed as it passes
through the spinoglenoid notch. The patient will have the most difficulty with -
correct answer ✔lateral rotation of the arm
Following a left radical mastectomy, a woman is unable to abduct her arm
more than 90 degrees. Which of the following structures do you suspect was
injured during the surgical procedure? - correct answer ✔long thoracic nerve
, After a penetrating wound in the area of the posterior axillary fold a patient
had weakness in extension and adduction of the arm. Which nerve is most
likely involved? - correct answer ✔thoracodoral nerve
During an axillary lymph node dissection, a resident cleans the space
between the pectoralis major and minor muscles, in an attempt to remove all
of the lateral pectoral lymph nodes. Upon recovery it is noted that the patient's
lower pectoralis major is paralyzed. The nerve most likely injured is the: -
correct answer ✔medial pectoral nerve
Damage to the posterior cord of the brachial plexus can affect the function of
the following muscles except - correct answer ✔pectoralis minor
A man is struck by the sharp edge of a metal panel across the anterior surface
of his right arm at midlength and the impact severs all of the tissue to the
bone. When examined in the emergency room it is noted that the patient can
only weakly flex his elbow and the lateral side of his forearm is numb. In
addition to the muscles, which nerve is injured? - correct answer
✔musculocutaneous
A 22-year-old man is involved in a motor vehicle accident. The patient
suffered multiple injuries including a displaced fracture of the left humerus. He
complains of an inability to open his left hand and loss of sensation on a
portion of his left hand. Name the diagnosis for this injury and explain its
mechanisms. - correct answer ✔Diagnosis: *Wrist drop* (no extension of
wrist )> hand is flexed because of damage to radial nerve in radial groove
A 34-year-old secretary complains of tingling of her right index and middle
fingers over 2 months' duration. She notes some weakness of her right hand
and has begun to drop items such as her coffee cup. Which of the intrinsic
muscles of the hand is paralyzed? - correct answer ✔lateral two lumbricals
