Afferent and efferent projections of the VIIIth cranial nerve in the lamprey <i>Lampetra japonica</i>

Koyama, Hiromichi; Kishida, Reiji; Goris, Richard C.; Kusunoki, Toyokazu

doi:10.1002/cne.902800415

Cited by 48 publications

(44 citation statements)

References 35 publications

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“…The dorsal and medial nuclei receive electroreceptive and mechanoreceptive primary afferents from the lateral line, respectively [Kishida et al, 1980;Fritzsch et al, 1984;Ronan and Northcutt, 1987;Ronan, 1988;Koyama et al, 1990;González and Anadón, 1992]. The distribution of primary vestibular afferents in the ventral nucleus has been shown experimentally in both larval and adult lampreys [Rubinson, 1974;Northcutt, 1979;Koyama et al, 1989;González and Anadón, 1994;Pflieger and Dubuc, 2000]. In addition, some dorsal column fibers were observed in close apposition with cells of the intermediate octavomotor nucleus [Dubuc et al, 1993].…”

Section: Rhombencephalic Projectionsmentioning

confidence: 98%

Afferent Connections of the Optic Tectum in Lampreys: An Experimental Study

Arriba

Pombal²

2006

Brain Behav Evol

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Tectal afferents were studied in adult lampreys of three species (Ichthyomyzon unicuspis, Lampetra fluviatilis, and Petromyzon marinus) following unilateral BDA injections into the optic tectum (OT). In the secondary prosencephalon, neurons projecting to the OT were observed in the pallium, the subhipoccampal lobe, the striatum, the preoptic area and the hypothalamus. Following tectal injections, backfilled diencephalic cells were found bilaterally in: prethalamic eminence, ventral geniculate nucleus, periventricular prethalamic nucleus, periventricular pretectal nucleus, precommissural nucleus, magnocellular and parvocellular nuclei of the posterior commissure and pretectal nucleus; and ipsilaterally in: nucleus of Bellonci, periventricular thalamic nucleus, nucleus of the tuberculum posterior, and the subpretectal tegmentum, as well as in the pineal organ. At midbrain levels, retrogradely labeled cells were seen in the ipsilateral torus semicircularis, the contralateral OT, and bilaterally in the mesencephalic reticular formation and inside the limits of the retinopetal nuclei. In the hindbrain, tectal projecting cells were also bilaterally labeled in the dorsal and lateral isthmic nuclei, the octavolateral area, the sensory nucleus of the descending trigeminal tract, the dorsal column nucleus and the reticular formation. The rostral spinal cord also exhibited a few labeled cells. These results demonstrate a complex pattern of connections in the lamprey OT, most of which have been reported in other vertebrates. Hence, the lamprey OT receives a large number of nonvisual afferents from all major brain areas, and so is involved in information processing from different somatic sensory modalities.

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Section: Rhombencephalic Projectionsmentioning

confidence: 98%

Afferent Connections of the Optic Tectum in Lampreys: An Experimental Study

Arriba

Pombal²

2006

Brain Behav Evol

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“…For the rhombencephalon, we have followed Nieuwenhuys (1977), Koyama et al (1989), and Ronan and Northcutt (1990). The subdivisions of the spinal cord are modified from Van Dongen et al (1985).…”

Section: Nomenclaturementioning

confidence: 99%

Afferents of the lamprey striatum with special reference to the dopaminergic system: A combined tracing and immunohistochemical study

1997

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The origin of afferents to the striatum in lamprey (Lampetra fluviatilis) was studied by using fluorescein-coupled dextran-amines (FDA). Injection of FDA into the striatum retrogradely labeled several cell populations in the forebrain and the rostral rhombencephalon. No retrograde labeled cells were seen in the mesencephalon. A dopamine-specific antiserum was used to determined the distribution of dopaminergic perikarya and fibers. Many dopamine-immunoreactive (DA-ir) fibers were present throughout the brain, but the highest density of labeled fibers was in the mediobasal prosencephalon, especially in the striatum, the lateral hypothalamic area, and the neurohypophysis. Most DA-ir cells were located in the mediobasal diencephalon (preoptic region, nucleus commissurae postopticae, hypothalamus, and nucleus tuberculi posterioris). In the mesencephalon, only a few immunopositive cells were observed in the tectum opticum. In the rhombencephalon, DA-ir cells were observed in the isthmic region, dorsally to the descending trigeminal tract, and caudally to the posterior rhombencephalic reticular nucleus. The rostralmost spinal cord received many descending DA-ir fibers from the brainstem. Along the spinal cord, DA-ir neurons were also found, some of which projected to the medioventral surface, forming a prominent plexus. On the basis of double-labeling experiments, it is shown that the dopaminergic input to the striatum originates from the nucleus tuberculi posterioris. Thus, the striatum receives inputs from different structures, including a strong dopaminergic innervation from the diencephalon. Much of the dopaminergic system in Lampetra fluviatilis is basically similar to that seen in some teleosts, but it presents differences with other anamniote (elasmobranch) as well as amniote groups.

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“…The RS neurons receive vestibular input through interneurons of vestibular nuclei (Koyama et al 1989;Northcutt 1979;Rovainen 1979). They also receive input from other sensory systems, from the forebrain, from different centers in the brain stem, and from the spinal cord Dubuc et al 1993;Rovainen 1967Rovainen , 1979Viana Di Prisco et al 1995;Wickelgren 1977).…”

Section: Introductionmentioning

confidence: 99%

Responses of Reticulospinal Neurons in the Lamprey to Lateral Turns

Karayannidou

Zelenin²,

Orlovsky³

et al. 2007

Journal of Neurophysiology

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Karayannidou A, Zelenin PV, Orlovsky GN, Deliagina TG. Responses of reticulospinal neurons in the lamprey to lateral turns. J Neurophysiol 97: 512-521, 2007. First published November 1, 2006; doi:10.1152/jn.00912.2006. When swimming, the lamprey maintains a definite orientation of its body in the vertical planes, in relation to the gravity vector, as the result of postural vestibular reflexes. Do the vestibular-driven mechanisms also play a role in the control of the direction of swimming in the horizontal (yaw) plane, in which the gravity cannot be used as a reference direction? In the present study, we addressed this question by recording responses to lateral turns in reticulospinal (RS) neurons mediating vestibulospinal reflexes. In intact lampreys, the activity of axons of RS neurons was recorded in the spinal cord by implanted electrodes. Vestibular stimulation was performed by periodical turns of the animal in the yaw plane (60°p eak to peak). It was found that the majority of responding RS neurons were activated by the contralateral turn. By removing one labyrinth, we found that yaw responses in RS neurons were driven mainly by input from the contralateral labyrinth. We suggest that these neurons, when activated by the contralateral turn, will elicit the ipsilateral turn and thus will compensate for perturbations of the rectilinear swimming caused by external factors. It is also known that unilateral eye illumination elicits a contralateral turn in the yaw plane (negative phototaxis). We found that a portion of RS neurons were activated by the contralateral eye illumination. By eliciting an ipsilateral turn, these neurons could mediate the negative phototaxis.

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Afferent and efferent projections of the VIIIth cranial nerve in the lamprey Lampetra japonica

Cited by 48 publications

References 35 publications

Afferent Connections of the Optic Tectum in Lampreys: An Experimental Study

Afferent Connections of the Optic Tectum in Lampreys: An Experimental Study

Afferents of the lamprey striatum with special reference to the dopaminergic system: A combined tracing and immunohistochemical study

Responses of Reticulospinal Neurons in the Lamprey to Lateral Turns

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