epiphysis cerebri
Definition
Noun: * A small, pinecone-shaped endocrine gland located in the brain. It is attached to the posterior part of the third ventricle and is responsible for the production and secretion of the hormone melatonin, which helps regulate sleep-wake cycles (circadian rhythms).
Usage
The term "epiphysis cerebri" is a formal, anatomical name used primarily in medical, biological, and scientific contexts. In common and even many clinical settings, it is more frequently referred to as the pineal gland or pineal body.
Advanced Usage
- "Pineal gland" is the most common synonym and is preferred in most modern texts.
- Historically, the epiphysis cerebri was referred to as the "seat of the soul" by philosopher René Descartes due to its central, singular location in the brain.
Variants and Related Words
- Pineal gland (n): The common name for the epiphysis cerebri.
- Pineal body (n): Another synonym for the epiphysis cerebri.
- Pinealocyte (n): The primary cell type found within the epiphysis cerebri, responsible for producing melatonin.
- Melatonin (n): The hormone secreted by the epiphysis cerebri.
Synonyms
- Pineal gland
- Pineal body
- Conarium (an older, less common term)
Related Terms and Phrases
- Circadian rhythm: The ~24-hour cycle that the epiphysis cerebri helps regulate.
- Diurnal rhythm: A daily biological pattern influenced by the epiphysis cerebri.
- Endocrine gland: The classification for the epiphysis cerebri, as it secretes a hormone directly into the bloodstream.
- Third ventricle: The brain cavity to which the epiphysis cerebri is attached.
Noun
-
a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
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