Identification of a secretomotor centre in the brain of Locusta migratoria, controlling the secretory activity of the adipokinetic hormone producing cells of the corpus cardiacum

1977 ◽  
Vol 184 (3) ◽  
Author(s):  
L.H.P.M. Rademakers
Keyword(s):  
Locusta Migratoria ◽  
Secretory Activity ◽  
Corpus Cardiacum ◽  
Adipokinetic Hormone ◽  
The Brain

The Control of Changes in Peripheral Sensilla Associated with Feeding in Locusta Migratoria (L.)

1972 ◽  
Vol 57 (3) ◽  
pp. 755-763
Author(s):  
E. A. BERNAYS ◽  
R. F. CHAPMAN
Keyword(s):  
Normal Level ◽  
Electrical Resistance ◽  
Locusta Migratoria ◽  
Corpus Cardiacum ◽  
Corpora Cardiaca ◽  
Diuretic Hormone ◽  
Stretch Receptors ◽  
The Brain ◽  
Maxillary Palps ◽  
Stimulation Of

1. The electrical resistance across the tips of the maxillary palps is not affected by stimulation of the palps, but increases to the normal level found after feeding as a result of distension of the foregut with agar or injection of corpus cardiacum homogenates into the haemolymph. 2. No increase in resistance occurs if the posterior pharyngeal nerves or the frontal connectives are cut. 3. It is inferred that distension of the foregut stimulates stretch receptors which, acting via the posterior pharyngeal nerves, the frontal connectives and the brain, cause the release of hormone from the storage lobes of the corpora cardiaca. This hormone acts on the terminal sensilla of the palps, causing them to close and so increasing the resistance across the palps. 4. Release of the diuretic hormone is controlled via the same pathway.

Serotonin-immunoreactive neurones in the brain of Locusta migratoria innervating the corpus cardiacum

1988 ◽  
Vol 254 (1) ◽  
Author(s):  
P.N.M. Konings ◽  
H.G.B. Vullings ◽  
R. Siebinga ◽  
J.H.B. Diederen ◽  
W.F. Jansen
Keyword(s):  
Locusta Migratoria ◽  
Corpus Cardiacum ◽  
The Brain

Secretory Structures associated with the Neurosecretory System of the Immature Scorpion, Heterometrus swammerdami

1961 ◽  
Vol s3-102 (60) ◽  
pp. 475-479
Author(s):  
MOHAMMAD HABIBULLA
Keyword(s):  
Composite Structure ◽  
Secretory Activity ◽  
Neurosecretory System ◽  
Neurosecretory Material ◽  
Corpus Cardiacum ◽  
Secretory Structures ◽  
Moult Stage ◽  
Prothoracic Glands ◽  
Frontal Ganglion ◽  
Rostral Region

Certain previously unknown structures, probably endocrine in nature, are described. The blind ‘end-organ’ which is present and shows signs of activity in the pre-moult stage shows no noticeable sign of activity in the post-moult stage. In certain respects it is comparable to the ‘anterior organ’ of spiders, which has been homologized with the prothoracic glands of insects. In the rostral region of the scorpion, where the rostral nerve ramifies, an accumulation of leucocytes is found; these show signs of secretory activity. Both at the origin of the rostral nerve and also where it ramifies, neurosecretory material is seen. This rostral structure is comparable in certain aspects with the rostral organ of spiders. Leucocytes occur not only in the rostral organ but also in association with the ‘endorgan’. The presence of two ganglionic masses, above and below the stomodaeal commissure, suggests the possibility of the sympathetic (stomatogastric) ganglion of the scorpion being a composite structure consisting of the frontal ganglion, the corpus cardiacum, and possibly the hypocerebral ganglion. A hypocerebral ganglion is absent in the adult.

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