Identification and localization of a neprilysin-like activity that degrades tachykinin-related peptides in the brain of the cockroach, Leucophaea maderae, and locust, Locusta migratoria

2003 ◽  
Vol 457 (1) ◽  
pp. 57-66 ◽  
Author(s):  
R. Elwyn Isaac ◽  
Dick R. Nässel
Keyword(s):  
Locusta Migratoria ◽  
Leucophaea Maderae ◽  
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.

Localization of leucomyosuppressin in the brain and circadian clock of the cockroach Leucophaea maderae

2007 ◽  
Vol 328 (2) ◽  
pp. 443-452 ◽  
Author(s):  
Sandra Söhler ◽  
Susanne Neupert ◽  
Reinhard Predel ◽  
Ruthann Nichols ◽  
Monika Stengl
Keyword(s):  
Circadian Clock ◽  
Leucophaea Maderae ◽  
The Brain

NPY-like peptides occur in the nervous system and midgut of the migratory locust, Locusta migratoria and in the brain of the grey fleshfly, Sarcophaga bullata

Peptides ◽  
1988 ◽  
Vol 9 (5) ◽  
pp. 1027-1036 ◽  
Author(s):  
L. Schoofs ◽  
J.M. Danger ◽  
S. Jegou ◽  
G. Pelletier ◽  
R. Huybrechts ◽  
...  
Keyword(s):  
Nervous System ◽  
Locusta Migratoria ◽  
Migratory Locust ◽  
Sarcophaga Bullata ◽  
The Brain

Restricted occurrence of Locusta migratoria ovary maturing parsin in the brain-corpora cardiaca complex of various insect species

1994 ◽  
Vol 102 (3) ◽  
pp. 233-239 ◽  
Author(s):  
O. Richard ◽  
M. Tamarelle ◽  
J. Girardie ◽  
S. Geoffre
Keyword(s):  
Locusta Migratoria ◽  
Insect Species ◽  
Corpora Cardiaca ◽  
The Brain

Myoinhibitory peptides in the brain of the cockroach Leucophaea maderae and colocalization with pigment-dispersing factor in circadian pacemaker cells

2012 ◽  
Vol 520 (5) ◽  
pp. 1078-1097 ◽  
Author(s):  
Julia Schulze ◽  
Susanne Neupert ◽  
Lilia Schmidt ◽  
Reinhard Predel ◽  
Tobias Lamkemeyer ◽  
...  
Keyword(s):  
Circadian Pacemaker ◽  
Pacemaker Cells ◽  
Pigment Dispersing Factor ◽  
Leucophaea Maderae ◽  
The Brain

scholarly journals Light Affects the Branching Pattern of Peptidergic Circadian Pacemaker Neurons in the Brain of the Cockroach Leucophaea maderae

2011 ◽  
Vol 26 (6) ◽  
pp. 507-517 ◽  
Author(s):  
Hongying Wei ◽  
Monika Stengl
Keyword(s):  
Fruit Flies ◽  
Branching Pattern ◽  
Circadian Pacemaker ◽  
Pacemaker Neurons ◽  
Optic Lobes ◽  
Pigment Dispersing Factor ◽  
Accessory Medulla ◽  
Leucophaea Maderae ◽  
The Brain

Pigment-dispersing factor–immunoreactive neurons anterior to the accessory medulla (aPDFMes) in the optic lobes of insects are circadian pacemaker neurons in cockroaches and fruit flies. The authors examined whether any of the aPDFMes of the cockroach Leucophaea maderae are sensitive to changes in period and photoperiod of light/dark (LD) cycles as a prerequisite to adapt to changes in external rhythms. Cockroaches were raised in LD cycles of 11:11, 13:13, 12:12, 6:18, or 18:6 h, and the brains of the adults were examined with immunocytochemistry employing antisera against PDF and orcokinin. Indeed, in 11:11 LD cycles, only the number of medium-sized aPDFMes specifically decreased, while it increased in 13:13. In addition, 18:6 LD cycles increased the number of large- and medium-sized aPDFMes, as well as the posterior pPDFMes, while 6:18 LD cycles only decreased the number of medium-sized aPDFMes. Furthermore, PDF-immunoreactive fibers in the anterior optic commissure and orcokinin-immunoreactive fibers in both the anterior and posterior optic commissures were affected by different lengths of light cycles. Thus, apparently different groups of the PDFMes, most of all the medium-sized aPDFMes, which colocalize orcokinin, respond to changes in period and photoperiod and could possibly allow for the adjustment to different photoperiods.

Pitch discrimination in locusts

1961 ◽  
Vol 155 (959) ◽  
pp. 218-231 ◽  
Keyword(s):  
Schistocerca Gregaria ◽  
Locusta Migratoria ◽  
Pitch Discrimination ◽  
High Pitch ◽  
Sound Stimulation ◽  
Sensory Axons ◽  
Metathoracic Ganglion ◽  
Tympanic Organ ◽  
The Brain ◽  
Stimulation Of

Sound stimulation of the tympanic organ of Locusta migratoria and Schistocerca gregaria initiates responses in the tympanic nerve and these in turn stimulate a few interneurones which ascend the ventral cord from the metathoracic ganglion to the brain. Some of the preparations show the following evidence of pitch discrimination. The response of the whole tympanic nerve to a pulsed note of low pitch cannot be made identical to the response to the same pulse at high pitch no matter how the relative inten­sities are adjusted. A continuous note, which presumably adapts some but not all of the primary receptors, modifies the relation between pre- and post-ganglionic responses in a way which depends on the pitch of the continuous note. The relative intensities of a pure tone of high pitch (10 to 15 kc/s) and one of low pitch (0.5 to 2.0 kc/s) can, in a preparation showing only ‘on' responses, be adjusted so that there is a post-ganglionic response to the former but not to the latter, although the latter causes a larger response in the tympanic nerve. Certain large interneurones, identifiable by their spike height, do not have the same curve of threshold to pulses of various pitch as does the summed response from the whole tympanic nerve. The post-ganglionic response is, therefore, towards a selected fraction of the sensory axons. In each of the above tests the effects are small and pitch discrimination cannot be of great significance for the life of the animal.

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