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Corpora arenacea (singular: corpus arenaceum, [1] also called brain sand or acervuli [2] [3] or psammoma bodies [4] or pineal concretions [4]) are calcified structures in the pineal gland and other areas of the brain such as the choroid plexus. Older organisms have numerous corpora arenacea, whose function, if any, is unknown.
The pineal gland is present in almost all vertebrates, but is absent in protochordates in which there is a simple pineal homologue. The hagfish , archaic vertebrates, lack a pineal gland. [ 7 ] In some species of amphibians and reptiles, the gland is linked to a light-sensing organ, variously called the parietal eye , the pineal eye or the ...
GingerMan Raceway is a road racing course located east of the town of South Haven in southwest Michigan, United States. The track was built in 1995 and opened for its first full season of racing sports cars and motorcycles in 1996. The track is 2.14 miles long and sits on 330 acres. [1] The Gridlife festival is held at the venue since 2014.
Calcification is the accumulation of calcium salts in a body tissue. It normally occurs in the formation of bone, but calcium can be deposited abnormally in soft tissue, [1] [2] causing it to harden. Calcifications may be classified on whether there is mineral balance or not, and the location of the calcification. [3]
The pineal gland is attached to the brain in this region. [7] The medial habenula (MHb) receives connections from posterior septum pellucidum and diagonal band of Broca; the lateral habenula receives afferents from the lateral hypothalamus, nucleus accumbens, internal globus pallidus, ventral pallidum, and diagonal band of Broca. [8]
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A pineal gland cyst is a usually benign (non-malignant) cyst in the pineal gland, a small endocrine gland in the brain. Historically, these fluid-filled bodies appeared on 1-4% of magnetic resonance imaging (MRI) brain scans, but were more frequently diagnosed at death, seen in 4-11% of autopsies. [ 1 ]
Berlin Raceway is a 0.438 mi (0.705 km) long paved oval race track in Marne, Michigan, [1] near Grand Rapids.The track races weekly as part of the NASCAR Advance Auto Parts Weekly Series. [2]