system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A newborn infant is born at 41 weeks gestation to a healthy G1P0 mother. The delivery was complicated by shoulder dystocia. The infant is in the 89th and 92th percentiles for height and weight, respectively. The mother's past medical history is notable for diabetes mellitus and obesity. Immediately after birth, the child's temperature is 99°F (37.2°C), blood pressure is 90/50 mmHg, pulse is 120/min, and respirations are 24/min. The child demonstrates a strong cry and pink upper and lower extremities bilaterally. The left arm is adducted and internally rotated at the shoulder and extended at the elbow. Extension at the elbow and flexion and extension of the wrist appear to be intact in the left upper extremity. The right upper extremity appears to have normal strength and range of motion in all planes. Which of the following sets of nerves or nerve roots is most likely affected in this patient?
assistant
C5 and C6 nerve roots