QuestionSBA
QuestionChoice
C6-T1 nerve roots form the majority of the brachial plexus. These nerves innervate the shoulder, arm and hand on each side of the body. These nerves do not innervate the diaphragm.
10023678
d
C6-T1
QuestionChoice
C1,2 and 3 all innervate the head and neck, allowing for control of forward, backwards and sideways movement of the head and neck. They do not control the diaphragm.
10023676
b
C1-C3
QuestionChoice
T1 and T2 are thoracic nerves and run between the ribs, with each thoracic nerve being named after the vertebra above it. These nerves innervate the intercostal muscles, not the diaphragm.
10023677
c
T1-T2
QuestionChoice
C3,4 and 5 all innervate the diaphragm, causing it to flatten during inspiration and return to a dome shape during expiration. Remember the phrase 'C3,4,5 keeps the diaphragm alive'.
10023675
a
C3-C5
QuestionChoice
L4-S3 nerve roots form the sacral plexus, which forms the sciatic nerve. This nerve runs down from the lumbar region of the spinal cord, into the leg.
10023679
e
L4-S3
Concept
Chapter
2693
4514
Innervation of the respiratory system
Topic
150
Respiratory physiology
17133
A 19-year-old male is on a ventilator after being involved in a severe car crash. The ventilator is taking over his breathing, replacing the function of the diaphragm.

Which nerve roots innervate the diaphragm?
a