Efferents to the labyrinth of the river lamprey (Lampetra fluviatilis) as revealed with retrograde tracing techniques

doi:10.1016/0304-3940(89)90385-6

Neuroscience Letters

Volume 96, Issue 3, 30 January 1989, Pages 241-246

https://doi.org/10.1016/0304-3940(89)90385-6 Get rights and content

Abstract

The cells of origin of centrifugal fibres to the labyrinth were examined in a jawless vertebrate, the lamprey, with several retrograde tracers (horseradish peroxidase (HRP), fluorescein isothiocyanate (FITC) and rhodamine coupled dextran-amines (FDA and RDA), and cobalt-lysine) that had been applied to the eighth nerve. With all 3 techniques, up to 20 cells were consistently labelled ipsilaterally, adjacent to the Mauthner cell; none were labelled on the contralateral side. The axons of the efferent cells emanate either from lateral dendrites or the perikaryon and course laterally towards the ipsilateral eighth nerve root. The dendrites ramify widely in the basal plate and may thus receive diverse inputs. The same tracers were applied to the lateral-line nerve and afferent fibres were labelled but no efferent cells, thus confirming previous reports. These data suggest that lampreys have an efferent innervation to the labyrinth but not to the lateral line.

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Neuroscience Letters

Abstract

References (23)

Primary vestibular projections in the hagfish, Eptatrutus burgeri

Brain Res.

The efferent cochlear projections of the superior olivary complex in the mustached bat

Hearing Res.

Common efferents to lateral-line and labyrinthine hair cells in aquatic vertebrates

Neurosci. Lett.

The origin of centrifugal inner ear fibres of gymnophions (Amphibia)

A horseradish peroxidase study

Neurosci. Lett.

Electron microscopical evidence for common inner ear and lateral-line efferents in urodeles

Neurosci. Lett.

Fluorescent detran-amines as axonal tracers in the nervous system of the chicken embryo

J. Neurosci. Methods

Central organization of the efferent supply to the labyrinth and lateral-line of the dogfish

Neuroscience

The origin of efferent fibres to the inner ear in a turtle (Terrapene ornata)

A horseradish peroxidase study

Brain Res.

Efferent acoustic neurons within the lateral superior olivary nucleus of the guinea pig

Brain Res.

Supraspinal and spinal inputs to the posterior rhombencephalic reticular nucleus (PRRN): anatomy, physiology and pharmacology

Acta Physiol. Scand.

Neuroanatomical evidence for electroreception in lampreys

Z. Naturforsch.

Cited by (36)

The continued importance of comparative auditory research to modern scientific discovery

6.33 - The Efferent Vestibular and Octavolateralis System: Anatomy, Physiology and Function

The Nervous Systems of Jawless Vertebrates

6.12 - Evolution and Plasticity of Inner Ear Vestibular Neurosensory Development

6.34 - Synaptic and Pharmacological Organization of Efferent Influences on Hair Cells and Vestibular Afferent Fibers

The Nervous Systems of Jawless Vertebrates