RECURRENT INHIBITION TO AND FROM MOTONEURONS INNERVATING THE FLEXOR-DIGITORUM AND FLEXOR-HALLUCIS-LONGUS MUSCLES OF THE CAT
RECURRENT INHIBITION TO AND FROM MOTONEURONS INNERVATING THE FLEXOR-DIGITORUM AND FLEXOR-HALLUCIS-LONGUS MUSCLES OF THE CAT
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DOI：
10.1152/jn.1990.63.3.395
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发表时间：
1990-03-01
影响因子：
2.5
通讯作者：
HAMM, TM
中科院分区：
文献类型：
--
作者：
HAMM, TM
1.研究了往返于支配猫趾长屈肌（FDL）和拇长屈肌（FHL）的运动神经元的反复抑制性突触后电位（IPSP），以确定涉及这些运动神经元的反复抑制性投射是否相似--与FDL和FHL的Ia和解剖学协同作用一致--或不同，这些肌肉在运动过程中的活动也是如此（O 'Donovan等，1982）。2.复合复发IPSPs记录在几种运动神经元支配后肢肌肉在刺激的一些肌肉神经的猫缺血性断头后，允许成为未麻醉。3.在支配FDL、FHL、外侧腓肠肌-比目鱼肌（LG-S）、内侧腓肠肌（MG）、跖肌（PI）、胫骨前肌（TA）或趾长伸肌（EDL）的运动神经元中未观察到来自刺激FDL神经的复发性IPSP。4.刺激FHL产生的反复IPSPs更大，更频繁地发现在LG-S比FDL运动神经元。FHL的复发性抑制在Pl中也比在FDL运动神经元中更大。5.在FHL中，由LG-S、PL和MG刺激产生的反复IPSP大于FDL运动神经元，并且在FHL中发现来自LG-S和MG的反复IPSP比FDL运动神经元更频繁。6.刺激TA神经在FDL中产生复发性IPSP，但在FHL运动神经元中不产生。少数FDL和FHL细胞（分别为6/23和9/34）接受小（小于0.5 mV）来自刺激EDL神经的复发IPSP。（250字处删节）
1. Recurrent inhibitory postsynaptic potentials (IPSPs) to and from motoneurons innervating the flexor digitorum longus (FDL) and flexor hallucis longus (FHL) muscles of the cat were investigated to determine whether recurrent inhibitory projections involving these motoneurons are similar--as would be consistent with the Ia and anatomic synergism of FDL and FHL--or are dissimilar, as are the activities of these muscles during locomotion (O'Donovan et al. 1982). 2. Composite recurrent IPSPs were recorded in several species of motoneurons innervating hindlimb muscles in response to stimulation of a number of muscle nerves in cats allowed to become unanesthetized after ischemic decapitation. 3. No recurrent IPSPs from stimulation of the FDL nerve were observed in motoneurons innervating FDL, FHL, lateral gastrocnemius-soleus (LG-S), medial gastrocnemius (MG), plantaris (Pl), tibialis anterior (TA), or extensor digitorum longus (EDL). 4. The recurrent IPSPs produced by stimulation of FHL were larger and found more frequently in LG-S than in FDL motoneurons. Recurrent inhibition from FHL was also greater in Pl than in FDL motoneurons. 5. The recurrent IPSPs produced by stimulation of LG-S, PL, and MG were larger in FHL than in FDL motoneurons, and those from LG-S and MG were found more frequently in FHL than in FDL motoneurons. 6. Stimulation of the TA nerve produces recurrent IPSPs in FDL but not in FHL motoneurons. A few FDL and FHL cells (6 of 23 and 9 of 34, respectively) received small (less than 0.5 mV) recurrent IPSPs from stimulation of the EDL nerve.(ABSTRACT TRUNCATED AT 250 WORDS)