Direction Selectivity Mediated by Adaptation in the Owl's Inferior Colliculus

Wang, Yunyan; Peña, José Luis

doi:10.1523/jneurosci.2920-13.2013

Cited by 17 publications

(28 citation statements)

References 93 publications

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“…Similar results were also found in the owl's external nucleus of the inferior colliculus (Wang et al . ; Wang & Pena, ) and also in the retina (Berry et al . ).…”

Section: Discussionmentioning

confidence: 99%

Spatial receptive field shift by preceding cross‐modal stimulation in the cat superior colliculus

et al. 2018

The Journal of Physiology

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Psychophysical studies have shown that the different senses can be spatially entrained by each other. This can be observed in certain phenomena, such as ventriloquism, in which a visual stimulus can attract the perceived location of a spatially discordant sound. However, the neural mechanism underlying this cross-modal spatial recalibration has remained unclear, as has whether it takes place dynamically. We explored these issues in multisensory neurons of the cat superior colliculus (SC), a midbrain structure that involves both cross-modal and sensorimotor integration. Sequential cross-modal stimulation showed that the preceding stimulus can shift the receptive field (RF) of the lagging response. This cross-modal spatial calibration took place in both auditory and visual RFs, although auditory RFs shifted slightly more. By contrast, if a preceding stimulus was from the same modality, it failed to induce a similarly substantial RF shift. The extent of the RF shift was dependent on both temporal and spatial gaps between the preceding and following stimuli, as well as the salience of the preceding stimulus. A narrow time gap and high stimulus salience were able to induce larger RF shifts. In addition, when both visual and auditory stimuli were presented simultaneously, a substantial RF shift toward the location-fixed stimulus was also induced. These results, taken together, reveal an online cross-modal process and reflect the details of the organization of SC inter-sensory spatial calibration.

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“…Similar results were also found in the owl's external nucleus of the inferior colliculus (Wang et al . ; Wang & Pena, ) and also in the retina (Berry et al . ).…”

Section: Discussionmentioning

confidence: 99%

Spatial receptive field shift by preceding cross‐modal stimulation in the cat superior colliculus

et al. 2018

The Journal of Physiology

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“…Sensitivity to auditory motion direction has been reported in the owl's external nucleus of the inferior colliculus (ICx) (Wagner & Takahashi, ; Wang et al ., , ), the main source of auditory input to OT. Recently, (Wang & Pena, ) demonstrated that directional selectivity in the ICx can be explained by adaptation to excitation in asymmetrical spatial receptive fields. Similarly, McAlpine et al .…”

Section: Discussionmentioning

confidence: 99%

Stimulus‐specific adaptation to visual but not auditory motion direction in the barn owl's optic tectum

Wasmuht

Peña

Gutfreund

2017

Eur J of Neuroscience

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Whether the auditory and visual systems use a similar coding strategy to represent motion direction is an open question. We investigated this question in the barn owl’s optic tectum (OT) testing stimulus specific adaptation (SSA) to the direction of motion. SSA, the reduction of the response to a repetitive stimulus that does not generalize to other stimuli, has been well established in OT neurons. SSA suggests a separate representation of the adapted stimulus in upstream pathways. So far, only SSA to static stimuli has been studied in the OT. Here we examined adaptation to moving auditory and visual stimuli. SSA to motion direction was examined using repeated presentations of moving stimuli, occasionally switching motion to the opposite direction. Acoustic motion was either mimicked by varying binaural spatial cues or implemented in free-field using a speaker array. While OT neurons displayed SSA to motion direction in visual space, neither stimulation paradigms elicited significant SSA to auditory motion direction. These findings show a qualitative difference in how auditory and visual motion is processed in the OT and support the existence of dedicated circuitry for representing motion direction in the early stages of visual but not the auditory system.

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“…Here we report auditory motion perception in the barn owl, a species for which data on the neuronal representation of motion stimuli in the inferior colliculus (IC) are available (e.g., Wagner and Takahashi 1992;Kautz and Wagner 1998;Wagner and von Campenhausen 2002;Wang and Peña 2013). Specifically, Wagner and Takahashi (1992) showed that the angular velocity and stimulus duration affected the neurons' response.…”

Section: Introductionmentioning

confidence: 99%