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Visual System

開催日 2014/9/12
時間 11:00 - 12:00
会場 Poster / Exhibition(Event Hall B)

The Similarity of Receptive Field Properties in Connections between the Lateral Geniculate Nucleus and the Primary Visual Cortex of the Cat

  • P2-135
  • 末松 尚史 / Naofumi Suematsu:1 内藤 智之 / Tomoyuki Naito:1 三好 智満 / Tomomitsu Miyoshi:2 澤井 元 / Hajime Sawai:2 佐藤 宏道 / Hiromichi Sato:1 
  • 1:大阪大院医認知行動科学 / Lab Cogni Behav Neurosci, Osaka Univ, Osaka, Japan 2:大阪大院医統合生理 / Dept Integr Physiol, Osaka Univ, Osaka, Japan 

Stimulus-specific receptive field (RF) properties, such as orientation selectivity and spatial frequency (SF) selectivity, in the early visual system are the key features of visual information processing. Although many studies have investigated retinal, geniculate, and cortical neural functions, relatively few studies have been conducted with a particular focus on the similarity/difference of the functional properties between regions, such as comparison of the RF properties in retinogeniculate/geniculocortical neural pairs. We previously compared the RF structures in the cat retinogeniculate connections, and found that there were multiple types of connections which probably enhance the visual stimulus specificity. In the current study, we recorded multi-unit activity simultaneously from the lateral geniculate nucleus and the primary visual cortex of anesthetized cats. Then, we compared the RF properties obtained using the reverse correlation method with subspace stimuli between the geniculocortical local population pairs with/without the significant functional connections. We found that the populations with the functional connections share more similar RF properties, especially SF selectivity. Also, we are conducting similar analysis on the RF properties in the cat retinogeniculate connections in order to clarify the manner of visual information transmission in the early visual system from the retina to the visual cortex.

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