A 32-year-old woman delivered a large baby after a difficult labor. At
delivery,head
infant's the 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
Which arm.
injured nerve is partially responsible for the baby inability to
abduct, flex
laterally and
rotate his right arm? correct answers
axillary nerve
A young girl presents with a right small forearm and a weak grasp. On the
same
you side,
observed a dropping of the eyelid and constriction of the pupil. Your
exam should
show: correct answers paralysis of palmar
interossei
Following a knife wound to the neck, you notice that the medial border of a
patient'sisleft
scapula located further from the midline than that of his right scapula. The
nerve injured
likely most by the wound is the: correct answers dorsal
scapular
A patient cannot raise his arm above the horizontal and exhibit the
abnormal
shown condition
in the following photograph. Which structure of the brachial plexus
woulddamaged?
likely most correct answers
roots
The suprascapular nerve may be trapped and compressed as it passes
through the notch. The patient will have the most difficulty with correct
spinoglenoid
answers
rotation of lateral
the
arm
Following a left radical mastectomy, a woman is unable to abduct her arm
more than
degrees. Which
90 of the following structures do you suspect was injured
during the
surgical procedure? correct answers long thoracic
nerve
After a penetrating wound in the area of the posterior axillary fold a
patient hadin extension and adduction of the arm. Which nerve is most likely
weakness
involved?
correct answers 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 nodes.
lymph pectoral Upon recovery it is noted that the patient's lower
pectoralis major
paralyzed. is
The nerve most likely injured is the: correct answers medial
pectoral nerve
Damage to the posterior cord of the brachial plexus can affect the
function of
following the
muscles except correct answers
pectoralis minor