Encoding of global visual motion in the nidopallium caudolaterale of behaving crows

Encoding of global visual motion in the nidopallium caudolaterale of behaving crows
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行为乌鸦尾侧巢穴的整体视觉运动编码

DOI:
10.1111/ejn.13430
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发表时间:
2017
影响因子:
3.4
通讯作者:
Nieder A
Nieder A
中科院分区:
医学3区
文献类型:
--
作者:
Wagener L;Nieder A

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Songbirds possess acute vision. How higher brain centres represent basic and parameterised visual stimuli to process sensory signals according to their behavioural importance has not been studied in a systematic way. We therefore examined how carrion crows (Corvus corone) and their nidopallial visual neurons process global visual motion information in dynamic random‐dot displays during a delayed match‐to‐sample (DMS) task. The behavioural data show that moderately fast motion speeds (16° of visual angle/s) result in superior direction discrimination performance. To characterise how neurons encode and maintain task‐relevant visual motion information, we recorded the single‐unit activity in the telencephalic association area ‘nidopallium caudolaterale’ (NCL) of behaving crows. The NCL is considered to be the avian analogue of the mammalian prefrontal cortex. Almost a third (28%) of randomly selected NCL neurons responded selectively to the motion direction of the sample stimulus, mostly to downward motions. Only few NCL neurons (7.5%) responded consistently to specific motion directions during the delay period. In error trials, when the crows chose the wrong motion direction, the encoding of motion direction was significantly reduced. This indicates that sensory representations of NCL neurons are relevant to the birds’ behaviour. These data suggest that the corvid NCL, even though operating at the apex of the telencephalic processing hierarchy, constitutes a telencephalic site for global motion integration.
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