PMID: 9550139Apr 29, 1998Paper

Comparison of neural elements in sexually dimorphic segments of the grasshopper, Schistocerca americana

The Journal of Comparative Neurology
K J Thompson, J L Roosevelt

Abstract

A uniquely female behavior in grasshoppers, oviposition, is driven by neural circuitry in the terminal abdominal segments of the female's central nervous system. Because it is known that the embryonic pattern of neuroblasts is sexually monomorphic in these animals, we were interested to know how the central nervous system of adults is organized to support the obvious behavioral dimorphism. Here, we compare three classes of identifiable adult neurons: ovipositor motor neurons, efferent dorsal unpaired median (DUM) neurons, and DUM interneurons in the eighth abdominal neuromere. Cobalt backfills of the eighth tergal nerves revealed identical complements of motor neurons in males and females. Included among these neurons in the male were putative homologues of two sets of ovipositor muscle motor neurons. Whereas these motor neurons supply two ovipositor muscles in the female, they are divided to supply three muscles in males. The eighth abdominal neuromere of both sexes contained seven efferent DUM neurons, but peripheral axon projections varied between males and females in accordance with gender-specific targets. In the eighth neuromere of females, some 22 small cell bodies of DUM interneurons were stained with Toluidine blue, wh...Continue Reading

Citations

Mar 23, 2010·Journal of Insect Physiology·Amir Ayali, Angela B Lange

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.