Norepinephrine is produced largely by neurons in the brain stem and acts both as a neurotransmitter and as a hormone.
The posterior stalk-like portion of the brain that connects the cerebrum to the spinal cord is known as the brainstem. The midbrain, the pons, and the medulla oblongata make up the brainstem in the human brain. Through the tentorial notch, the thalamus of the diencephalon is connected to the midbrain, and the diencephalon is occasionally included in the brainstem.
It plays crucial roles in controlling respiratory and cardiac function, assisting in the regulation of heart rate and breathing rate. Through the cranial nerves, it also supplies the face and neck with the majority of the motor and sensory nerve supply. The brainstem is the origin of ten pairs of cranial nerves. The control of the brain's neurological system and the body's sleep cycle are additional functions.
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