Nerve roots of the phrenic nerve

The video explains the innervation of the diaphragm by the phrenic nerve, which originates from the C3, C4, and C5 spinal nerves. These nerve roots are crucial for the diaphragm's function, enabling breathing by altering intrathoracic pressure. The mnemonic 'C3, C4, C5 keep the diaphragm alive' helps remember this concept.

What is the purpose of mentioning a BG song in the context of this lesson?

• To discuss the history of the BG band

• To explain the anatomy of the diaphragm

• To introduce a new song by the BG band

• To illustrate a concept with a memorable reference

From which spinal nerves does the phrenic nerve originate?

• C1, C2, and C3

• C3, C4, and C5

• C2, C3, and C4

• C5, C6, and C7

What is the primary role of the phrenic nerve?

• To provide sensory innervation to the diaphragm

• To control the heart rate

• To provide motor innervation to the diaphragm

• To supply blood to the diaphragm

How do the C3, C4, and C5 nerve roots contribute to breathing?

• By regulating the heartbeat

• By increasing blood flow to the lungs

• By controlling the vocal cords

• By enabling the diaphragm to move and change pressure

What phrase helps remember the function of C3, C4, and C5 in relation to the diaphragm?

• C3, C4, and C5 keep the lungs alive

• C3, C4, and C5 keep the heart alive

• C3, C4, and C5 keep the diaphragm alive

• C3, C4, and C5 keep the brain alive