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Androgen effects on vocal muscle structure in a teleost fish with inter‐ and intra‐sexual dimorphism
It is suggested that sonic muscle in Porichthys notatus is an androgen target tissue, fiber structure and fiber number are androgen‐sensitive features, and there exist sex‐ and morph‐specific patterns of sonic muscle responsiveness to androgen implants.
Vocal-acoustic pathways in a teleost fish
It is suggested that the medial column must be the origin of the descending pathway controlling activation of the vocal pacemaker circuitry and likely forms the basis for acoustically elicited vocalizations in teleost fish.
Sound‐generating (sonic) motor system in a teleost fish (Porichthys notatus): Sexual polymorphism in the ultrastructure of myofibrils
To the authors' knowledge, this is the first documentation of a sex difference or, for that matter, a sexual polymorphism in the ultrastructural features of a vertebrate myofibril.
Midbrain acoustic circuitry in a vocalizing fish
The results indicate a general pattern of acoustic circuitry similar to that of specialists, and show central adaptations, namely, a vocal–acoustic interface in DO and SO related to this species' vocal abilities.
Complementary explana-tions for existing phenotypes in an acoustic communication system
Acoustic Nuclei in the Medulla and Midbrain of the Vocalizing Gulf Toadfish (Opsanus beta)
The pattern identified is consistent with that reported in other teleosts, including both vocal and non-vocal species, and clarifies earlier reports of the organization of hindbrain octaval nuclei in toadfish and the closely related midshipman fish.
Distribution of androgen receptor mRNA expression in vocal, auditory, and neuroendocrine circuits in a teleost fish
- P. Forlano, M. Marchaterre, D. Deitcher, A. Bass
- BiologyThe Journal of comparative neurology
- 15 February 2010
The distribution of AR mRNA strongly supports the role of androgens as modulators of behaviorally defined vocal, auditory, and neuroendocrine circuits in teleost fish and vertebrates in general.
Sound‐generating (sonic) motor system in a teleost fish (Porichthys notatus): Sexual polymorphisms and general synaptology of sonic motor nucleus
This study examined possible sex differences in the size of sonic motoneurons, and the type and distribution of their afferent terminal boutons in the plainfin midshipman.
Ultrastructural features and hormone‐dependent sex differences of mormyrid electric organs
The major ultrastructural features of mormyrid electrocytes are described, which include surface invaginations along each face, myonuclei, myofilaments, and neuromuscularlike junctions formed by the axons of spinal electromotoneurons.
Distribution of extrajunctional acetylcholine receptors on a vertebrate muscle: evaluated by using a scanning electron microscope autoradiographic procedure
The results suggest that the postdenervation steady-state extrajunctional receptor site density is reached sooner near the junction than away from the junction, demonstrating the usefulness of SEM autoradiography to study the expression and distribution of membrane molecules at high resolution.