ウサギ歩行運動時における四肢間協調パターン

• 松山 清治

  札幌医大・医・第二生理

• 石黒 雅敬

  札幌医大・医・第二生理

• 青木 藩

  北海道文教大・人間科学・理学療法

書誌事項

タイトル別名

• Characteristics of interlimb coordination in quadrupedal locomotion of rabbits

抄録

This study aimed to investigate characteristics of interlimb coordination in quadrupedal locomotion of decerebrate rabbits. Under halothane anesthesia, rabbits (NZW, 2-3 kg) were decerebrated at the precollicular-postmammillary level. The head was then fixed in a stereotaxic apparatus, and the body was supported by rubber belts. To evoke locomotion, 50-Hz stimuli (10-110 μA, 0.2 ms duration, 5-10 sec) were applied to the midbrain cuneiform nucleus (CNF) with Wood's-metal-filled glass microelectrodes. Extensor and flexor EMG activities of the four limbs were recorded during locomotion and their phase relationships were investigated. When the CNF was stimulated, left and right hindlimbs consistently exhibited in phase movements, but bilateral forelimbs basically displayed left-right alternating movements. Despite such differences, the forelimb movements were synchronized with the hindlimb ones. The phase differences of left vs. right forelimbs were usually circa 180° (viz. in opposite phase), but during strong CNF stimulation in some cases, they shifted from 180° to e.g. circa 230°. In contrast, after spinal cord transection at the thoracic level, left and right forelimbs displayed in opposite phase movements at any stimulus intensity. These findings suggest that activities of the central pattern generators (CPGs) for forelimb locomotion are largely influenced by those of hindlimb CPGs. Functional couplings of fore- and hindlimb CPGs would be essential for elaborating synergistic quadrupedal locomotion. [J Physiol Sci. 2007;57 Suppl:S158]

収録刊行物

• 日本生理学会大会発表要旨集

  日本生理学会大会発表要旨集 2007 (0), 158-158, 2007

  一般社団法人　日本生理学会

キーワード

• locomotion
• interlimb coordination
• rabbit
• central pattern generator
• decerebration

詳細情報

• CRID: 1390282680704957056
• NII論文ID: 130005448962
• DOI: 10.14849/psjproc.2007.0_158_4
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可