歯根膜感覚入力を受けるネコ大脳皮質第一次体性感覚野ニューロンの反応と形態

DOI Web Site 参考文献48件
  • 清水 信行
    日本大学歯学部補綴学教室局部床義歯学講座 日本大学歯学部生理学教室

書誌事項

タイトル別名
  • Response Properties and Morphology of Primary Somatosensory Cortical Neurons Receiving Input from the Periodontal Afferent in Cats.

この論文をさがす

抄録

Single neuronal activities responded to low-threshold mechanical stimulation (stimulus intensity:<0.05 N) of the tooth (PDN) were intracellularly recorded from the primary somatosensory cortex (SI) in the cat anesthetized with α-chloralose and halothane. After identification of their response characteristics, neurobiotin was injected iontophoretically and morphological features of neurons were accurately analyzed.<BR>PDNs responded to low-threshold mechanical stimulation (<0.05 N) of the tooth and received dominantly periodontal afferent without input from other intraoral structures. Most of them received periodontal input from the ipsilateral side and showed directional selectivity to mechanical stimulation.<BR>Most PDNs intracellulary stained were classified as pyramidal neurons according to their morphological properties (13 Pyramidal and 1 non-pyramidal PDNs). Each pyramidal PDN had different morphological features. Mainly, axons of lamina III PDNs ran through relatively superficial regions of the subcortical white matter, whereas those of lamina V ran deep into the subcortical areas. The results suggested that lamina III pyramidal PDNs send periodontal sensory information to the other cortical regions and lamina V pyramidal PDNs send them to the far regions of the CNS such as the medulla and spinal cord.

収録刊行物

参考文献 (48)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ