Ultrastructure of the mammalian pinealocyte under natural and experimental conditions: Quantitative aspects

Karasek, M

doi:10.1002/jemt.1070210204

Cited by 10 publications

(4 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In many studies a numerical increase of SR profiles under various physiological and experimental conditions has been described (Lues 1971;Karasek 1976;Vollrath 1981;Khaledpour and Vollrath 1987;Karasek et al 1988;Karasek 1992;McNulty and Fox 1992;Bhatnagar 1994). The nocturnal increase lies in the range between 2-and 6.7-fold (for review see McNulty and Fox 1992).…”

Section: Discussionmentioning

confidence: 98%

The shape of synaptic ribbons in the rat pineal gland

Jastrow

Mach

Vollrath

1997

Cell and Tissue Research

View full text Add to dashboard Cite

Under the transmission electron microscope, synaptic ribbons (SRs) of the mammalian pineal gland appear as rod-like organelles. Their three-dimensional structure is not precisely known. In the present study, pineal SRs were investigated using serial sections obtained from rats killed at noon and midnight. The shape of the SRs was reconstructed based on SR profile length and the number of sections in which the profiles were contained. The results obtained show that SRs are basically flat plate-like structures with polymorphic lateral edges. Reconstructions of SRs revealed that they had average dimensions of 300x150x35 nm and were 19.3% larger at night than at day; the difference in SR size points to perhaps major differences in synaptic function between day and night.

show abstract

Section: Discussionmentioning

confidence: 98%

The shape of synaptic ribbons in the rat pineal gland

Jastrow

Mach

Vollrath

1997

Cell and Tissue Research

View full text Add to dashboard Cite

show abstract

“…Taking into account the observed increase in the number of vesi cles with osmiophilic inclusions occurring at the new moon (and at the background of hyperplasia of dic tyosomes and an expanding area of the Golgi complex), one can speculate that the vesicles carrying dense inclu sions are formed owing to the Golgi complex of pinealo cytes. It is generally accepted that the functional state of the pineal endocrine cells -light pinealocytes (LP) and dark pinealocytes (DP) -is different [1,2,16]. The observed lunar phase dependent morphological changes can be a reflection of the shifts in the functional state of the pineal gland.…”

Section: Discussionmentioning

confidence: 99%

Pineal gland as an endocrine gravitational lunasensor: Manifestation of moon-phase dependent morphological changes in mice

Герасимов

Kostyuchenko

Solovieva

et al. 2014

Biochemistry Moscow

View full text Add to dashboard Cite

We found that some morphological properties of the pineal gland and submandibular salivary gland of mice are significantly distinct at the new and full moon. We suppose that the differences are initiated by the displacements of the electron-dense concretions in the secretory vesicles of pinealocytes. This presumably occurs under the influence of the gravitational field, which periodically changes during different phases of the moon. It seems that the pinealocyte is both an endocrine and gravisensory cell. A periodic secretion of the pineal gland probably stimulates, in a lunaphasic mode, the neuroendocrine system that, in turn, periodically exerts influence on different organs of the body. The observed effect probably serves, within the lifelong clock of a brain, to control development and aging in time.

show abstract

“…Fibers from these neurons descend through the brain stem presumably without making synaptic contact with other cells until their arrival at the intermediolateral cell column of the upper thoracic cord. [23] These are preganglionic sympathetic neurons. After synapsing with these cells, the preganglionic axons exit the spinal cord and pass up the sympathetic chain to the superior cervical ganglia where the final synapse is made.…”

Section: Pineal Gland and Cicardian Rhythmmentioning

confidence: 99%

Pineal gland and the third eye anatomy history revisited – a systematic review of literature

Chaudhary¹,

Bharti²,

Yadav³

et al. 2023

View full text Add to dashboard Cite

The structure and functions of neuroendocrine pineal gland remains an enigma to both philosophers and scientists since time immemorial. Some of the structural and functional mysteries of pineal gland are unfolded to some extent in this article by reviewing the work of various researchers. Recently a neuronal circuit consisting of seven neurons between retina and pineal gland have been established to relate the effect of light and other rays on its secretion. The various physical properties such as piezoelectricity, piezoluminescence, electromagnetic field, solar flare, infrared energy are also explained and correlated with the structural and secretional components of the gland. The neurosecretion of pineal gland such as melatonin play an important role in sleep-wake patterns, timings and release of reproductive hormones along with temperature control. The presence of all enzymes needed for the synthesis of di-methyl-tryptamine (DMT) in pineal gland explains the near death experience (NDE) phenomenon. The various audiovisual hallucinations in NDE phenomenon occur due to massive increase of DMT in pineal gland before death. A very high concentration of di-methyl-tryptamine (DMT), presence of retinal proteins in 10% of pinealocytes, its role in thermoregulation and a possible role as magnetoreceptor in blind men and highest deposits of fluoride in the body are not only interesting but significant for the future research. Hence a lot of further research on pineal gland is still required to correlate its unique properties with its structural components.

show abstract

Ultrastructure of the mammalian pinealocyte under natural and experimental conditions: Quantitative aspects

Cited by 10 publications

References 85 publications

The shape of synaptic ribbons in the rat pineal gland

The shape of synaptic ribbons in the rat pineal gland

Pineal gland as an endocrine gravitational lunasensor: Manifestation of moon-phase dependent morphological changes in mice

Pineal gland and the third eye anatomy history revisited – a systematic review of literature

Contact Info

Product

Resources

About