Visual cells in the inferior colliculus of the cat

Mascetti, Gian Gastone; Strozzi, Luis

doi:10.1016/0006-8993(88)91531-4

Cited by 25 publications

(21 citation statements)

References 25 publications

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“…Second, the activity occurred on trials that were not initiated and/or completed successfully (and no reward was delivered), as well as on those that were successfully performed. Third, visual responses have been reported in the IC of anesthetized preparations in which no behavioral task was involved (14,24). Fourth, the response properties differed from the reward-related influences that we have previously explored: this reward-related activity was most pronounced later in the trial when the reward delivery was imminent (26).…”

Section: Discussionmentioning

confidence: 81%

Visual- and saccade-related signals in the primate inferior colliculus

Porter

Metzger

2007

Proc. Natl. Acad. Sci. U.S.A.

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The inferior colliculus (IC) is normally thought of as a predominantly auditory structure because of its early position in the ascending auditory pathway just before the auditory thalamus. Here, we show that a majority of IC neurons (64% of 180 neurons) in awake monkeys carry visual-and/or saccade-related signals in addition to their auditory responses (P < 0.05). The response patterns involve primarily excitatory visual responses, but also increased activity time-locked to the saccade, slow rises in activity time-locked to the onset of the visual stimulus, and inhibitory responses. The presence of these visual-related signals suggests that the IC plays a role in integrating visual and auditory information. More broadly, our results show that interactions between sensory pathways can occur at very early points in sensory processing streams, which implies that multisensory integration may be a low-level rather than an exclusively high-level process.auditory ͉ monkey ͉ multisensory ͉ vision ͉ cross-modal

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Section: Discussionmentioning

confidence: 81%

Visual- and saccade-related signals in the primate inferior colliculus

Porter

Metzger

2007

Proc. Natl. Acad. Sci. U.S.A.

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“…Vision exerts control over the spatial sensitivity of neurons in the external nucleus of the barn owl IC (e.g., Brainard & Knudsen, 1993). Projections from retina to the pericentral nucleus of the IC have been reported in rat and monkey (Itaya & Van Hoesen, 1982) and visually responsive neurons have been identified in this subnucleus in cat (Mascetti & Strozzi, 1988). We have previously shown that the position of the visual sense organ, the eye, affects the responses of many neurons in IC.…”

Section: Implications For the Read-out Mechanism And Integration Withmentioning

confidence: 99%

A Monotonic Code for Sound Azimuth in Primate Inferior Colliculus

Groh¹,

Kelly²,

Underhill

2003

Journal of Cognitive Neuroscience

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Abstract& We investigated the format of the code for sound location in the inferior colliculi of three awake monkeys (Macaca mulatta). We found that roughly half of our sample of 99 neurons was sensitive to the free-field locations of broadband noise presented in the frontal hemisphere. Such neurons nearly always responded monotonically as a function of sound azimuth, with stronger responses for more contralateral sound locations. Few, if any, neurons had circumscribed receptive fields. Spatial sensitivity was broad: the proportion of the total sample of neurons responding to a sound at a given location ranged from 30% for ipsilateral locations to 80% for contralateral locations. These findings suggest that sound azimuth is represented via a population rate code of very broadly responsive neurons in primate inferior colliculi. This representation differs in format from the place code used for encoding the locations of visual and tactile stimuli and poses problems for the eventual convergence of auditory and visual or somatosensory signals. Accordingly, models for converting this representation into a place code are discussed. &

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“…In addition to being an essential relay in auditory processing, the inferior colliculus has the most diverse connections of any of the auditory structures in the central auditory nervous system [11]. The inferior colliculus receives auditory input mainly from the contralateral ear [13] in addition to receiving visual [14,15] and somatosensory inputs [16].…”

Section: Introductionmentioning

confidence: 99%

A role for the inferior colliculus in multisensory speech integration

Champoux¹,

Tremblay²,

Mercier

et al. 2006

NeuroReport

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Multisensory integration can occur at relatively low levels within the central nervous system. Recent evidence suggests that multisensory audio-visual integration for speech may have a subcortical component, as acoustic processing in the human brainstem is influenced by lipreading during speech perception. Here, stimuli depicting the McGurk illusion (a demonstration of auditory-visual integration using speech stimuli) were presented to a 12-year-old child (FX) with a circumscribed unilateral lesion of the right inferior colliculus. When McGurk-type stimuli were presented in the contralesional hemifield, illusory perception reflecting bimodal integration was significantly reduced compared with the ipsilesional hemifield and a group of age-matched controls. These data suggest a functional role for the inferior colliculus in the audio-visual integration of speech stimuli.

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Visual cells in the inferior colliculus of the cat

Cited by 25 publications

References 25 publications

Visual- and saccade-related signals in the primate inferior colliculus

Visual- and saccade-related signals in the primate inferior colliculus

A Monotonic Code for Sound Azimuth in Primate Inferior Colliculus

A role for the inferior colliculus in multisensory speech integration

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