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活動與演講
  • 標題:演講公告-2017.9.7(四)汪勁安博士
  • 公告日期:2017-08-31

國立政治大學心理學系106-1學術研討會

講者:汪勁安博士(Postdoctoral Associate, Queen’s University, Canada

講題:Control of Pupil Responses from Circuits to Cognition 瞳孔控制-從神經結構到認知歷程

時間:201797日(星期四)1400-1600

地點:政大果夫樓一樓101會議室

歡迎您的蒞臨!

 

演講摘要:

Pupil size, as a component of orienting, changes rapidly in response to local salient events in the environment in addition to global luminance modulation. Our recent research has shown that visual, auditory, or audiovisual stimuli can elicit transient pupil dilation, and the timing and magnitude of the evoked responses are systematically modulated by the salience of the stimuli. Moreover, microstimulation of the superior colliculus (SC), a midbrain structure causally involved in eye movements and attention, evokes similar transient pupil dilation, suggesting that the SC coordinates the orienting response which includes transient pupil dilation. Pupil size is also modulated by cognitive processes such as executive functioning. This function has been examined using the anti-saccade task where subjects are instructed to either look at the peripheral stimulus (pro-saccade) or to suppress the automatic pro-saccade response and voluntarily look in the opposite direction of the stimulus (anti-saccade). We have demonstrated that pupil size prior to stimulus appearance effectively predicts subsequent saccadic behaviors, arguably through the projections from the SC to the pupil control circuitry. Furthermore, this profile of pupil size modulation is significantly blunted in ageing and patient populations, reflecting debilitated circuits for voluntary saccade preparation. Pupillometry is an easy-to-measure way to understand neural and cognitive processing. Our results not only demonstrate the sensory and cognitive modulation on pupil size, but also provide the neural substrate underlying this modulation.

 

講者簡介:詳附件。

  • 附件檔案: 檔案下載 Adobe PDF
  • 參考連結:
  • 張貼人:溫宜錦
  • 最後修改時間:2017-08-31 PM 4:16

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