Functional connectivity between auditory areas field L and CLM and song system nucleus HVC in anesthetized zebra finches.

@article{Shaevitz2007FunctionalCB,
  title={Functional connectivity between auditory areas field L and CLM and song system nucleus HVC in anesthetized zebra finches.},
  author={Sarita S. Shaevitz and Fr{\'e}d{\'e}ric E. Theunissen},
  journal={Journal of neurophysiology},
  year={2007},
  volume={98 5},
  pages={
          2747-64
        }
}
A key discovery that has emerged from studies of the vocal system in songbirds is that neurons in these regions respond preferentially to playback of the bird's own song (BOS). This BOS selectivity is not a general property of neurons in primary and secondary auditory forebrain regions, field L and caudolateral mesopallium (CLM). Moreover, anatomical studies have been unable to conclusively define a direct projection from field L and/or CLM to HVC, a central structure for integrating sensory… 
Functional MRI of Auditory Responses in the Zebra Finch Forebrain Reveals a Hierarchical Organisation Based on Signal Strength but Not Selectivity
TLDR
It is suggested that unlike nuclei in the song system, sub-regions in the primary auditory pallium do not show selectivity for the BOS, but appear to show different levels of activity with exposure to any sound according to their place in the auditory processing stream.
Activity in a Premotor Cortical Nucleus of Zebra Finches Is Locally Organized and Exhibits Auditory Selectivity in Neurons but Not in Glia
TLDR
Sensory responses in large populations of neurons and neuron-assistive cells in the songbird motor area HVC, an auditory-vocal brain area involved in sensory learning and in adult song production are studied.
Verhoye M, Bolhuis JJ, VanderLinden A. Functional MRI of Auditory Responses in the Zebra Finch Forebrain Reveals a Hierarchical Organisation
Background: Male songbirds learn their songs from an adult tutor when they are young. A network of brain nuclei known as the ‘song system’ is the likely neural substrate for sensorimotor learning and
Linear and nonlinear auditory response properties of interneurons in a high-order avian vocal motor nucleus during wakefulness.
TLDR
It is suggested that HVC contains a diversity of responses that vary in overall excitability to auditory stimuli, as well as bias in spike rate increases to BOS over CON.
A Synaptic Basis for Auditory–Vocal Integration in the Songbird
TLDR
It is found that CM neurons are active in response to song playback and during singing, indicating their potential importance to song perception and processing of auditory feedback.
Spatial organization of neural activity in a premotor area involved in song production in songbirds investigated using two-photon calcium imaging
TLDR
A protocol that allows to optically monitor neural activity from a local population of identified HVC cells in an anesthetized and head-fixed zebra finch and investigated the local stimulus dependent correlation structure is developed, which extended the knowledge of local HVC activity patterns.
Principles of auditory processing differ between sensory and premotor structures of the songbird forebrain.
Sensory and motor brain structures work in collaboration during perception. To evaluate their respective contributions, the present study recorded neural responses to auditory stimulation at multiple
Emergence of Learned Categorical Representations within an Auditory Forebrain Circuit
TLDR
While learning enhances neural encoding of song components in both regions, CMM neurons encode more information about the learned categories associated with songs than do CLM neurons, suggesting that CLM and CMM are part of a functional sensory hierarchy modified by learning to yield representations of natural vocal signals that are increasingly informative with respect to behavior.
Own-Song Recognition in the Songbird Auditory Pathway: Selectivity and Lateralization
TLDR
Surprisingly, the selectivity of the songbird brain is found to be lateralized toward the right side, a finding reminiscent of the potential right lateralization of song production in zebra finches but also of own-face and own-voice recognition in human beings.
At the interface of the auditory and vocal motor systems: NIf and its role in vocal processing, production and learning
TLDR
This review carefully examines what is known about NIf at the anatomical, physiological, and behavioral levels, and reexamine conclusions drawn from previous studies in the light of the current understanding of the song system, and establishes what can be said with certainty about N if's involvement in song learning, maintenance, and production.
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