Multisensory interactions in primate auditory cortex: fMRI and electrophysiology

@article{Kayser2009MultisensoryII,
  title={Multisensory interactions in primate auditory cortex: fMRI and electrophysiology},
  author={Christoph Kayser and Christopher I. Petkov and Nikos K. Logothetis},
  journal={Hearing Research},
  year={2009},
  volume={258},
  pages={80-88}
}

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References

SHOWING 1-10 OF 105 REFERENCES

Multisensory interactions within human primary cortices revealed by BOLD dynamics.

TLDR
Using event-related fMRI, it is observed that simple auditory stimuli activated primary visual cortices and that simple visual stimuli activatedPrimary auditory cortices, indicative of multisensory convergence.

Physiological and Anatomical Evidence for Multisensory Interactions in Auditory Cortex

TLDR
Single-unit recordings and estimates of mutual information that visual stimuli can influence the activity of units in the auditory cortex of anesthetized ferrets demonstrate that multisensory convergence and integration are features common to all auditory cortical areas but are especially prevalent in higher areas.

Visual modulation of neurons in auditory cortex.

TLDR
It is demonstrated that visual stimuli can modulate the firing of neurons in auditory cortex in a manner that depends on stimulus efficacy and timing, and these neurons meet the criteria for sensory integration and provide the auditory modality with multisensory contextual information about co-occurring environmental events.

Auditory-somatosensory multisensory processing in auditory association cortex: an fMRI study.

TLDR
It is demonstrated that auditory and somatosensory inputs converge in a subregion of human auditory cortex along the superior temporal gyrus, and the multisensory region identified in the present investigation may be the human homologue of CM.

Human–simian correspondence in the early cortical processing of multisensory cues

TLDR
The correspondence between specific findings in humans and monkeys is reviewed, focusing on two areas, posterior auditory association cortex and posterior parietal visual association cortex, and the importance of human–simian homology in the study of the multisensory components of primate communication is considered.

Interactions between the Superior Temporal Sulcus and Auditory Cortex Mediate Dynamic Face/Voice Integration in Rhesus Monkeys

TLDR
The data suggest that the integration of faces and voices is mediated at least in part by neuronal cooperation between auditory cortex and the STS and that interactions between these structures are a fast and efficient way of dealing with the multisensory communication signals.

Multisensory Integration of Dynamic Faces and Voices in Rhesus Monkey Auditory Cortex

TLDR
It is demonstrated unequivocally that the primate auditory cortex integrates facial and vocal signals through enhancement and suppression of field potentials in both the core and lateral belt regions of the auditory cortex in awake behaving rhesus monkeys.

Functional Imaging Reveals Numerous Fields in the Monkey Auditory Cortex

TLDR
This study functionally mapped the auditory cortex of behaving and of anesthetized macaque monkeys with high resolution fMRI and provides functional support for a model where three fields in primary auditory cortex are surrounded by eight neighboring “belt” fields in non-primary auditory cortex.
...