pineal


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Related to pineal: pineal eye, pineal cyst, pineal tumor

pineal

 [pin´e-al]
1. shaped like a pine cone.
2. pertaining to the pineal body.
pineal body a small, conical structure attached by a stalk to the posterior wall of the third ventricle of the cerebrum, believed by many to be an endocrine gland. In certain amphibians and reptiles the gland is thought to function as a light receptor. In most mammals, including humans, it appears to be the major or unique site of melatonin biosynthesis; the effect of melatonin on the body and the exact function of the pineal body remain obscure. Called also epiphysis cerebri and pineal gland.

pin·e·al

(pin'ē-ăl),
1. Shaped like a pine cone. Synonym(s): piniform
2. Pertaining to the pineal body.
[L. pineus, relating to the pine, pinus]

pineal

/pin·e·al/ (pin´e-il)
1. pertaining to the pineal body.
2. shaped like a pine cone.

pineal

(pĭn′ē-əl, pī′nē-)
adj.
1. Having the form of a pine cone.
2. Of or relating to the pineal gland.

pineal

[pin′ē·əl]
Etymology: L, pineus, pine cone
1 pertaining to the pineal body.
2 resembling a pine cone.

pineal

adjective Referring to the pineal gland or region of the brain.

Pronunciation
Medspeak-UK: pronounced, PIE knee ull
Medspeak-US: pronounced, PIN ee tull

pin·e·al

(pin'ē-ăl)
1. Shaped like a pinecone.
Synonym(s): piniform.
2. Pertaining to the pineal body.
[L. pineus, relating to the pine, pinus]

pineal

1. shaped like a pine cone.
2. pertaining to the pineal body.

pineal body, pineal gland
a small, conical endocrine gland attached by a stalk to the dorsal wall of the third ventricle of the cerebrum. In certain amphibians and reptiles the gland functions as a light receptor. In most mammals, including humans, it appears to be the major or unique site of melatonin biosynthesis. The effect of melatonin on the body and the exact function of the pineal body remain uncertain. There is an increasing body of evidence that the pineal body is inhibitory to the gonads and that it is the principal mechanism in the known effect of environmental illumination on estrous cycles. It is proposed that the retina perceives the changes in light intensity and stimulates the pineal gland via the sympathetic nervous system.
pineal extract
pineal eye
in lower vertebrates the pineal body is a third or pineal eye.
pineal gland
see pineal body (above).
References in periodicals archive ?
Studies have recently examined several other genes that are involved in retinal dystrophies that potentially lead to blindness, and they found that these genes are also expressed in the pineal gland (Bailey et al.
In this way, the hormone enters the bloodstream and some pineal melatonin travels to the gut.
The photoperiod, circadian regulation and chronodisruption: the requisite interplay between the suprachiasmatic nuclei and the pineal and gut melatonin.
The differential diagnosis for neoplastic masses in the pineal region includes GCT (pure germinoma, World Health Organization [WHO] grade 2) and nongerminomatous cell tumors, including pineal parenchymal tumors such as pineocytomas (WHO grade 1), pineoblastomas (WHO grade 4), pineal parenchymal tumors of intermediate differentiation (no current WHO grade), and papillary tumors of the pineal region (WHO grade 2-3).
Regression of gastroesophageal reflux disease symptoms using dietary supplementation with melatonin, vitamins and aminoacids: comparison with omeprazole," J Pineal Res, October 2006
Melatonin and the pineal gland: influence on mammalian seasonal and circadian physiology.
It is reported that rhythmical secretion of melatonin by the pineal gland subsequently induces physiological, metabolic and gonadal changes in fish (Koger et al.
Consequently, the pineal gland is thought to play a significant role in Seasonal Affective Disorder (SAD).
The pineal gland is a pea-sized structure located in the midline of the brain between the two thalami lying above the third ventricle outside the blood-brain barrier.
Inflammatory pseudotumors of the CNS are usually dura-based but can be found anywhere in the neuraxis, including brain parenchyma, spinal cord, choroid plexus, (2) and the pineal region.
The gene is mainly expressed in the eye, pineal gland, and brain.