Tonotopic organization in the avian telencephalon

Zaretsky, Malcolm D.; Konishi, Masakazu

doi:10.1016/0006-8993(76)91058-1

Cited by 45 publications

(17 citation statements)

References 11 publications

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“…A tonotopic organization has been reported in this path way in birds [Zaretsky andKonishi. 1976: Riibsamen andDorrscheidt.…”

Section: The Dorsal Thalamus Of Amniotesmentioning

confidence: 98%

The Dorsal Thalamus of Jawed Vertebrates: A Comparative Viewpoint

Butler¹

1995

Brain Behav Evol

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In anamniotes, the dorsal thalamus comprises: (1) a caudal division, the collothalamus, which receives its predominant input from the midbrain roof and projects ipsilaterally to the telencephalon, predominantly to the striatum, and (2) a rostral division, the lemnothalamus, which predominantly receives a direct retinal (Iemniscal) input and projects bilaterally to the telencephalon, predominantly to the pallium. In amniotes, collothalamic nuclei relay visual, auditory, and somatosensory-multisensory inputs from the midbrain roof to the ipsilateral telencephalon, terminating in both striatum and pallium. For example, the collothalamic visual nuclei consist of the LP-pulvinar complex in mammals and nucleus rotundus in diapsid reptiles, birds, and turtles. Among amniotes, the latter nuclei are homologous to each other as discrete nuclei, as are the collothalamic auditory and collothalamic somatosensory-multisensory nuclei. Lemnothalamic nuclei (and nuclear groups) in amniotes predominantly (and/or plesiomorphically) receive Iemniscal inputs; some project to the telencephalon bilaterally, and most, in contrast to collothalamic nuclei, do not project to the striatum. In mammals, the lemnothalamic nuclei include most of those in the anterior, medial, intralaminar, and ventral nuclear groups and the dorsal lateral geniculate nucleus. In diapsid reptiles, they include the dorsomedial and dorsolateral anterior nuclei and the dorsal lateral optic nucleus; comparable nuclei are present in birds and turtles, with birds additionally having a discrete somatosensory Iemniscal relay nucleus. These lemnothalamic nuclei in each amniote radiation are homologous as a field to the lemnothalamus (i.e., nucleus anterior) in anamniotes. Both divisions of the dorsal thalamus were elaborated to some degree in the common ancestral amniote stock. A further major elaboration of the lemnothalamus characterized the ancestral stock of mammals and may have been one of the key events in early mammalian evolution. Birds have independently, to a lesser degree, elaborated the lemnothalamus.

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“…A tonotopic organization has been reported in this path way in birds [Zaretsky andKonishi. 1976: Riibsamen andDorrscheidt.…”

Section: The Dorsal Thalamus Of Amniotesmentioning

confidence: 98%

The Dorsal Thalamus of Jawed Vertebrates: A Comparative Viewpoint

Butler¹

1995

Brain Behav Evol

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“…This location is analogous to the location of auditory cortex in mammals. As in the primary auditory areas of many other animals, field L in zebra finches and other birds displays a tonotopic organization Gehr et al 1999;Muller and Leppelsack 1985;Zaretsky and Konishi 1976). Based on Nissl and Golgi staining studies, the field L region has been divided into 5 subregions called L2a, L2b, L1, L3, and L .…”

Section: Introductionmentioning

confidence: 99%

Feature Analysis of Natural Sounds in the Songbird Auditory Forebrain

Sen

Theunissen

Doupe

2001

Journal of Neurophysiology

213

223

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Sen, Kamal, Frédéric E. Theunissen, and Allison J. Doupe. Feature analysis of natural sounds in the songbird auditory forebrain. J Neurophysiol 86: 1445Neurophysiol 86: -1458Neurophysiol 86: , 2001. Although understanding the processing of natural sounds is an important goal in auditory neuroscience, relatively little is known about the neural coding of these sounds. Recently we demonstrated that the spectral temporal receptive field (STRF), a description of the stimulus-response function of auditory neurons, could be derived from responses to arbitrary ensembles of complex sounds including vocalizations. In this study, we use this method to investigate the auditory processing of natural sounds in the birdsong system. We obtain neural responses from several regions of the songbird auditory forebrain to a large ensemble of bird songs and use these data to calculate the STRFs, which are the best linear model of the spectral-temporal features of sound to which auditory neurons respond. We find that these neurons respond to a wide variety of features in songs ranging from simple tonal components to more complex spectral-temporal structures such as frequency sweeps and multi-peaked frequency stacks. We quantify spectral and temporal characteristics of these features by extracting several parameters from the STRFs. Moreover, we assess the linearity versus nonlinearity of encoding by quantifying the quality of the predictions of the neural responses to songs obtained using the STRFs. Our results reveal successively complex functional stages of song analysis by neurons in the auditory forebrain. When we map the properties of auditory forebrain neurons, as characterized by the STRF parameters, onto conventional anatomical subdivisions of the auditory forebrain, we find that although some properties are shared across different subregions, the distribution of several parameters is suggestive of hierarchical processing.

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“…The topographic representation of frequency is well established at all levels of the auditory system, from the cochlea to the cortex (Tunturi, 1952;Woolsey, 1960;Rose et al, 1960Rose et al, , 1963Manley, 1970Manley, , 1971Aitkin and Webster, 1972;Merzenich and Brugge, 1973;Pritz, 1974a,b;Rubel and Parks, 1975;Zaretsky and Konishi, 1976;Echteler, 1985;Feng, 1986;Irvine, 1986;Carr, 1992;Carr and Code, 2000). A one-dimensional frequency map along the mammalian cochlea and avian basilar papilla (i.e., the avian cochlea) is transferred through the subsequent levels of the auditory system by precise topographic connections.…”

mentioning

confidence: 99%

Timing and topography of nucleus magnocellularis innervation by the cochlear ganglion

Molea¹,

Rubel²

2003

J of Comparative Neurology

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This series of experiments examined the arrival and organization of cochlear nerve axons in the primary auditory brainstem nucleus, nucleus magnocellularis (NM), of the chick. DiI and DiD were injected into the cochlear nerve, cochlear ganglion, and basilar papilla (i.e., avian cochlea) in fixed tissue and labeled axons were studied in NM and its vicinity. Cochlear nerve axons first penetrate NM between stages 29 (E6) and 36 (E10). Axons penetrate NM in a middle-to-posterior-to-anterior developmental sequence; the anterior, high-frequency region of NM receives axons last. When cochlear nerve axons arrive in the NM, they are already organized in a topographic map related to the position of their cell bodies along the basilar papilla, foreshadowing the tonotopic mapping observed between NM and the basilar papilla later in development. Evidence of a topographic map was also observed in the other primary auditory brainstem nucleus, nucleus angularis. These results indicate that topographic mapping of position (and ultimately characteristic frequency) between the basilar papilla and NM is established as cochlear nerve axons arrive in the NM prior to the onset of synaptic activity. .

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Tonotopic organization in the avian telencephalon

Cited by 45 publications

References 11 publications

The Dorsal Thalamus of Jawed Vertebrates: A Comparative Viewpoint

The Dorsal Thalamus of Jawed Vertebrates: A Comparative Viewpoint

Feature Analysis of Natural Sounds in the Songbird Auditory Forebrain

Timing and topography of nucleus magnocellularis innervation by the cochlear ganglion

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