Serotonin
A neurotransmitter that is involved in the transmission of nerve impulses. Serotonin can trigger the release of substances in the blood vessels of the brain that in turn cause the pain of migraine. Serotonin is also key to mood regulation; pain perception; gastrointestinal function, including perception of hunger and satiety; and other physical functions.
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- Serotype
The kind of microorganism as characterized by serologic typing (testing for recognizable antigens on the surface of the microorganism).
- Serrated
Serratus anterior; Serratus magnus; Serratus posterior inferior; Serratus posterior superior.
- Serration
Serratus anterior; Serratus magnus; Serratus posterior inferior; Serratus posterior superior.
- Serratus
Serratus anterior; Serratus magnus; Serratus posterior inferior; Serratus posterior superior.
- Serratus anterior
One of the serratus muscles of the back and thorax. The serrautus anterior originates from the lateral aspect (the side) of first eight to nine ribs and inserts into the medial margin of the scapula (wing bone). The serratus anterior rotates the scapula and pulls it forward and elevates ribs.