Studien an der Epiphysis cerebri und am Subcommissuralorgan der Fr�sche

Mautner, W.

doi:10.1007/bf00344472

Cited by 53 publications

(3 citation statements)

References 46 publications

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“…radish peroxidase injected in the rabbit ventricle by Weindl and Joynt (1973) were only moderate absorbed by micropinocytotic vesicles in the subcommissural cells. Trypan blue intraventricularly injected in Rana (Mautner 1965) and in rat (Stanka 1963) were not absorbed at all. T h e absorbing capacity can therefore not be a very prominent function of these cells.…”

Section: Discussionmentioning

confidence: 91%

The Infundibular Organ ofBranchiostoma lanceolatum

Obermüller‐Wilén

1976

Acta Zoologica

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The infundibular organ of adult and larval Branchiostoma was studied by means of the electron microscope. The secretion produced by the infundibular cells is released into the ventricular fluid from secretory vacuoles, fusing with the apical plasmalemma and forming a Reissner's fiber in the ventricle. The basal cell processes reach the external limiting membrane but no basal release of secretory material has been observed. No synapses are in contact with the infundibular cells. The organ seems to function autonomously with neither nervous control from the brain tissue nor chemical regulation from the ventricular fluid.

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Section: Discussionmentioning

confidence: 91%

The Infundibular Organ ofBranchiostoma lanceolatum

Obermüller‐Wilén

1976

Acta Zoologica

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“…Pineal fibers coursing near the SCO have also been found in frogs (Diederen, 1970(Diederen, , 1973Eldred et al, 1980;Jime ´nez et al, 1995;Mautner, 1965;Oksche, 1954Oksche, , 1955Oksche, , 1956Oksche, , 1962Paul, 1972;Paul et al, 1972;Wake et al, 1974;Fig. 27).…”

Section: Neural Connections Of the Subcommissural Organ With The Pineal Complex And The Circadianmentioning

confidence: 91%

Neural input and neural control of the subcommissural organ

Jiménez

Fernández-Llébrez

Pérez-Fígares

2001

Microsc. Res. Tech.

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The neural control of the subcommissural organ (SCO) has been partially characterized. The best known input is an important serotonergic innervation in the SCO of several mammals. In the rat, this innervation comes from raphe nuclei and appears to exert an inhibitory effect on the SCO activity. A GABAergic innervation has also been shown in the SCO of the rat and frog Rana perezi. In the rat, GABA and the enzyme glutamate decarboxylase are involved in the SCO innervation. GABA is taken up by some secretory ependymocytes and nerve terminals, coexisting with serotonin in a population of synaptic terminals. Dopamine, noradrenaline, and different neuropeptides such as LH-RH, vasopressin, vasotocin, oxytocin, mesotocin, substance P, ␣-neoendorphin, and galanin are also involved in SCO innervation. In the bovine SCO, an important number of fibers containing tyrosine hydroxylase are present, indicating that in this species dopamine and/or noradrenaline-containing fibers are an important neural input. In Rana perezi, a GABAergic innervation of pineal origin could explain the influence of light on the SCO secretory activity in frogs. A general conclusion is that the SCO cells receive neural inputs from different neurotransmitter systems. In addition, the possibility that neurotransmitters and neuropeptides present in the cerebrospinal fluid may also affect the SCO activity, is discussed.

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“…With the discovery of the endocrine function of the pineal gland (=epiphysis cerebri) [Wurtman and Axelrod, 19651, the pineal vascularization and pineal-brain vascular relations became of interest to pineal gland research. Initially, the intrinsic vascularization of the gland and its relation to surrounding brain areas and choroid plexuses were studied light microscopically in India-ink-injected specimens [Bartheld and Moll, 1954;Mautner, 1964Mautner, , 1965Lierse, 1965;Swain, 1968;Quay, 1973, 19791. More recently, microvascular corrosion casts of the pineal gland of the trout [Syed Ali et al, 19871, the lizard [Teo et al, 19931, the rat [Hodde, 1979[Hodde, , 1981Hodde and Veltman, 1979;Ohtani et al, 1983;Murakami et al, 19881, the rabbit [Ohtani et al, 19831, and the common tree shrew [Chunhabundit and Somana, 19911 were examined with the scanning electron microscope.…”

Section: Introductionmentioning

confidence: 99%

Microvascularization of the pineal gland in the freshwater turtle, Pseudemys scripta elegans (Reptilia): A scanning electron microscopic study of vascular corrosion casts

Hermann-Kleiter

Lametschwandtner

1995

Journal of Pineal Research

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Gross supply, microvascular patterns, and drainage routes of the pineal gland and its vascular relations with associated structures (dorsal sac, paraphysis, choroid plexus of the third ventricle) were studied by scanning electron microscopy of microvascular corrosion casts in 10 specimens of the freshwater turtle, Pseudemys scripta elegans. Light microscopy of tissue sections (one transverse and one longitudinal series) served to attribute cast vascular territories to anatomical structures. The tubular pineal gland body is supplied bilaterally by small branches of the saccular artery, a branch of the lateral choroidal artery. Branches of the diencephalic artery supply the pineal stalk. The pineal gland microvascular bed is a two-dimensional network that embraces the tubular gland. The network is made up mainly of venules with few true capillaries. Venules draining the ventral surface of the pineal gland body join those coming from the choroid plexus of the third ventricle and drain into the sagittal sinus. The less dense vascular network embracing the dorsal surface of the pineal body drains directly into the sagittal sinus. The pineal stalk drains into the diencephalic vein or directly into the sagittal sinus. No efferent (venous) vascular connections capable as transport route for pineal secretions toward surrounding telencephalic, diencephalic, or mesencephalic areas were found.

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Studien an der Epiphysis cerebri und am Subcommissuralorgan der Fr�sche

Cited by 53 publications

References 46 publications

The Infundibular Organ ofBranchiostoma lanceolatum

The Infundibular Organ ofBranchiostoma lanceolatum

Neural input and neural control of the subcommissural organ

Microvascularization of the pineal gland in the freshwater turtle, Pseudemys scripta elegans (Reptilia): A scanning electron microscopic study of vascular corrosion casts

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