The Polysynaptic Pathways from the Low Threshold Cutaneous Afferents of the Trunk to Motoneurons Innervating Hindlimb Muscles in the Spinal Cat

Journal of Veterinary Medical Science

Yasuhiro WADA³  Taisei HOSOIDO¹  Yukari SANO²  Megumi GOTO³  Naomi WADA² 

[1] Osaka Veterinary Referral Center;Laboratory of System Physiology, Veterinary Medical School, Yamaguchi University;The United Graduate School of Veterinary Science, Yamaguchi University

关键词: feline;    hindlimb;    motoneuron;    spinal cord;    trunk;   

DOI  :  10.1292/jvms.09-0233

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(11)We studied the reflex actions of the cutaneous afferents innervating the trunk to hindlimb motoneurons in the spinal cat using an intracellular recording technique. Stimulation of the trunk cutaneous afferents entering into the L2-L5 spinal segment produced different types of polysynaptic potentials in hindlimb motoneurons via polysynaptic neuronal pathways. The trunk cutaneous afferents predominantly caused excitatory PSPs in the flexor motoneurons and inhibitory PSPs in the extensor motoneurons. The size and latency of polysynaptic potentials were related to the proximity of the spinal segments of the nerves stimulated to the spinal segments of motoneurons. These findings suggest that the neuronal pathways from trunk cutaneous afferents to hindlimb motoneurons play an important role in coordinating between the trunk and hindlimbs.

【 授权许可】

Unknown