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Cervical Plexus- The major motor branch of this plexus is the phrenic nerve which from C3 via C4 and passes into the thoracic cavity in front of the first rib to innervate the diaphragm. "C3 C4 C5, keep the diaphragm alive."

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How many nerves in the human face?

There are twelve pairs of cranial nerves in the human face that serve different functions such as sensory input, motor control, and autonomic control.


Which nerve plexus would serve the abdominal muscles?

The abdominal muscles are primarily innervated by the lower intercostal nerves, which originate from the thoracic spinal nerves. These nerves come together to form the lower thoracic intercostal nerves and the subcostal nerve, collectively contributing to the innervation of the abdominal muscles.


Which nervous system includes mixed nerves that serve the musculoskeletal system?

The peripheral nervous system contains mixed nerves (both sensory and motor) that the musculoskeletal needs to function.


Major functions of the phrenic nerves?

The major function of the phrenic nerves is to innervate the diaphragm, which is the primary muscle responsible for respiration. These nerves play a crucial role in controlling the movement of the diaphragm during breathing by sending signals from the brain to the diaphragm muscle. Dysfunction of the phrenic nerves can lead to respiratory issues and difficulty breathing.


What are two major components of the parasympathetic division of the ANS?

Two major components of the parasympathetic division of the autonomic nervous system are the cranial nerves, specifically the vagus nerve (cranial nerve X), which innervates many organs in the body, and sacral nerves originating from the sacral region of the spinal cord, which also play a key role in controlling various bodily functions, such as digestion and elimination.