Acoustic Communication in the Guinea Fowl (Numida Meleagris)

Scheich, Henning; Bock, Wojtek J.; Bonke, D.; Langner, Gerald; Maier, Verena

doi:10.1007/978-1-4684-4412-4_37

Cited by 8 publications

(9 citation statements)

References 51 publications

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“…These sites would be at least 1 mm from DM, if DM in the guinea fowl is located in a similar place to DM in pigeon. An important difference between studies such as those described by Scheich et al (1983) and the present study, however, is that the guinea fowl in the former study were not anesthetised. The much greater level of excitability of neurons in the awake bird, therefore, could well have led to the effective stimulation of DM or its efferent pathways, even though the stimulating electrode was at some distance from DM.…”

Section: Identification and Location Of Dmcontrasting

confidence: 57%

“…This is also the case with injections in RA, which is a much larger nucleus than the pigeon DM (Wild, 1993b). There is also evidence from electrical brain stimulation studies of various parts of the forebrain of nonsongbirds, including the diencephalon and archistriatum, that suggests the midbrain call area might receive a descending projection via the occipitomesencephalic tract, a tract that originates in the archistriatum and traverses the diencephalon (Zeier and Karten, 1971;Phillips and Youngren, 1974;Seller and Armitage, 1983;Scheich et al, 1983).…”

Section: Afferent Connections Of Dmmentioning

confidence: 89%

“…Although this is consistent with the finding that in some studies there is a direct relationship between lowest effective current intensity and proximity to the nucleus here identified anatomically as DM (e.g., Potash, 1970b;Brown, 1971;Seller, 1980), it is apparently not consistent with the fact that vocalization can be elicited, even with small electrodes and small currents, from regions of the midbrain at some distance from DM. Scheich et al (1983), for instance, show stimulation sites at the level of caudal MLd in the guinea fowl that were effective in eliciting natural calls at well below 50 µA. These sites would be at least 1 mm from DM, if DM in the guinea fowl is located in a similar place to DM in pigeon.…”

Section: Identification and Location Of Dmmentioning

confidence: 93%

“…Outside DM, other sites frequently reported to be effective in eliciting vocalizations when stimulated are those within the nucleus mesencephalicus lateralis, pars ventralis (MLv), a broad region ventral to ICo through which courses the dispersed efferent outflow of DM as shown in the present study. Many DM axons also course immediately dorsal to the nucleus isthmi parvocellularis (Ipc), and some through the nucleus tegmenti pedunculo-pontinus, pars compacta (TPc), both nuclei previously thought to have a role in vocal control (Seller, 1980;Scheich et al, 1983).…”

Section: Identification and Location Of Dmmentioning

confidence: 99%

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Projections of the dorsomedial nucleus of the intercollicular complex (DM) in relation to respiratory-vocal nuclei in the brainstem of pigeon (Columba livia) and zebra finch (Taeniopygia guttata)

1997

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Injections of neuronal tracers were made into the dorsomedial nucleus of the intercollicular complex (DM) of pigeons and zebra finches in order to investigate the projections of this nucleus which has long been implicated in respiratory-vocal control. Despite the fact that pigeons are nonsongbirds and zebra finches are songbirds, the projections were very similar in both species. Most descended throughout the brainstem, taking ventral and dorsal trajectories, which merged in the medulla. Those descending ventrally terminated upon the ventrolateral parabrachial nucleus (PBvl), the nucleus infraolivaris superior, a nucleus of the rostral ventrolateral medulla (RVL), and the nucleus retroambigualis (RAm). Those taking a dorsal trajectory via the occipitomesencephalic tract terminated in the tracheosyringeal part of the hypoglossal nucleus (XIIts), the suprahypoglossal region, and nucleus retroambigualis. There were also substantial projections throughout an arc extending between XIIts and RVL rostrally, and XIIts and RAm caudally. Neurons throughout this arc, which include inspiratory premotor neurons at levels straddling the obex and expiratory premotor neurons more caudally (in RAm), were retrogradely labeled from spinal injections. The DM projections were predominantly ipsilateral, but there were distinct contralateral projections to all the homologous nuclei in both species. All but the projections to PBvl and XIIts were reciprocal. In summary, the projections of DM suggest that it is able to influence all the key motor and premotor nuclei involved in patterned respiratory-vocal activity.

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Section: Identification and Location Of Dmcontrasting

confidence: 57%

Section: Afferent Connections Of Dmmentioning

confidence: 89%

Section: Identification and Location Of Dmmentioning

confidence: 93%

Section: Identification and Location Of Dmmentioning

confidence: 99%

See 2 more Smart Citations

Projections of the dorsomedial nucleus of the intercollicular complex (DM) in relation to respiratory-vocal nuclei in the brainstem of pigeon (Columba livia) and zebra finch (Taeniopygia guttata)

1997

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“…The structural differences are substantial: elucidation of the functional consequences will help in identifying the evolutionary significance of the differences in the ears of the vertebrate groups. The songbirds offer the opportunity to investigate the processing of species-specific vocalizations in the inner ear and through the various neuronal levels in the brain (see e.g., Konishi 1970;Leppelsack 1978;Sachs and O'Connell 1983;Sachs et al 1980a;Scheich et al 1983).…”

Section: Introductionmentioning

confidence: 99%

Activity patterns of cochlear ganglion neurones in the starling

et al. 1985

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Summary. 1. Spontaneous activity and responses to simple tonal stimuli were studied in cochlear ganglion neurones of the starling.2. Both regular and irregular spontaneous activity were recorded (Figs. I to 5). Non-auditory cells have their origin in the macula lagenae. Mean spontaneous rate for auditory cells (all irregularly spiking) was 45 spikes s-1.3. In half the units having characteristic frequencies (CFs) <1.5 kHz, time-interval histograms (TIHs) of spontaneous activity showed regularly-spaced peaks or 'preferred' intervals. The spacing of the peak intervals was, on average, 15% greater than the CF-period interval of the respective units (Fig. 11).4. In TIH of lower-frequency cells without preferred intervals, the modal interval was also on average about 15% longer than the CF-period interval (Fig. 11). Apparently, the resting oscillation frequency of these cells lies below their CF.5. Tuning curves (TCs) of neurones to short tone bursts show no systematic asymmetry as in mammals. Below CF 1 kHz, the low-frequency flanks of the TCs are, on average, steeper than the high-frequency flanks. Above CF 1 kHz, the reverse is true (Fig. 15).6. The cochlear ganglion and nerve are tonotopically organized. Low-frequency fibres arise apically in the papilla basilaris and are found near non-auditory (lagenar) fibres (Figs. 2 and 19).7. Discharge rates to short tones were monotonically related to sound presure level (Fig. 20). Saturation rates often exceeded 300 spikes s-1.8. 'On-off' responses and primary suppression of spontaneous activity were observed (Figs. 22 and 23).Abbreviations." CF characteristic frequency; TC tuning curve; TIH time interval histogram 9. A direct comparison of spontaneous activity and tuning-curve symmetry (Fig. 15b) revealed that, apart from quantative differences, fundamental qualitative differences exist between starling and guinea-pig primary afferents.

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Distribution of GABAergic perikarya and terminals in the centers of the higher auditory pathway of the chicken

Müller

1988

Cell Tissue Res.

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The distribution of presumed GABAergic neurons and axon terminals in nuclei of the higher auditory pathway of the chicken was investigated by immunocyto-chemical methods employing antisera to the rate-limiting enzyme of GABA synthesis, glutamic acid decarboxylase, and to GABA. In the mesencephalic auditory center (MLD) about 20% of the cells reveal immunoreactivity. In contrast, the thalamic relay station nucleus ovoidalis is devoid of immunostained somata. This nucleus contains a high density of punctate immunoreactive structures presumed to be GABAergic axon terminals. In the auditory forebrain center field L and the auditory portions of the hyperstriatum ventrale, up to 8% of the cells were immunopositive. These neurons were significantly smaller than estimated from measurements of the overall cell population in these nuclei. From the two-dimensional arrangement of immunopositive neurons it is suggested that the GABAergic system in the avian auditory telencephalon consists of two separate groups of neurons: one subgroup mediating local inhibitory interactions, the other responsible for lateral inhibition between different frequency representations.

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Acoustic Communication in the Guinea Fowl (Numida Meleagris)

Cited by 8 publications

References 51 publications

Projections of the dorsomedial nucleus of the intercollicular complex (DM) in relation to respiratory-vocal nuclei in the brainstem of pigeon (Columba livia) and zebra finch (Taeniopygia guttata)

Projections of the dorsomedial nucleus of the intercollicular complex (DM) in relation to respiratory-vocal nuclei in the brainstem of pigeon (Columba livia) and zebra finch (Taeniopygia guttata)

Activity patterns of cochlear ganglion neurones in the starling

Distribution of GABAergic perikarya and terminals in the centers of the higher auditory pathway of the chicken

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