Rats recovering from unilateral barrel-cortex ischemia are capable of completing a whisker-dependent task using only their affected whiskers.
Rats recovering from unilateral barrel-cortex ischemia are capable of completing a whisker-dependent task using only their affected whiskers.
复制标题
从单侧桶状皮层缺血中恢复的大鼠能够仅使用受影响的胡须来完成依赖于胡须的任务。
DOI：
10.1016/s0006-8993(02)04141-0
复制
发表时间：
2003
期刊：
影响因子：
2.9
通讯作者：
Hand,Peter
中科院分区：
文献类型：
--
作者：
Hoffman,JohnR;Greenberg,JoelH;Furuya,Daisuke;Craik,RebeccaL;Fanelli,Patrick;Breslow,Steven;Sheehan,Shaun;Ketschek,Andrea;Damkaoutis,Christa;Reivich,Martin;Hand,Peter
Rats use their vibrissae for a variety of exploratory tasks including location of objects and discrimination of texture. This study examines recovery in vibrissal function following a unilateral ischemic injury to the somatosensory cortex. Vibrissal function was examined in adult food-restricted rats performing on a two-texture discrimination device. Animals were trained and tested until the criteria of >80% correct choices was demonstrated on three consecutive days. Ischemic rats were constrained to use the affected whiskers by clipping the ipsilateral vibrissae. One group was tested after ischemia, a second group was trained before ischemia and then tested, and a third group was pre-trained and received whisker stimulation and tested post-ischemia. Naı̈ve animals recovering from ischemia took longer to reach criteria than intact or unilateral trimmed control animals. Pre-trained animals with compression ischemia receiving whisker stimulation with sucrose water completed the task to criteria in the fewest number of trials. The results indicate that recovery of vibrissal function occurs following a unilateral ischemic injury. Histological analysis in animals without whisker stimulation indicates that the number of normal appearing cortical barrels following ischemia was inversely correlated to the number of trials needed to complete the behavioral task. This suggests that the natural recovery of the ability to discriminate textures is related to the degree of damage to the barrel cortex. The relationship between cortical barrels and behavioral recovery did not hold for the ischemic animals receiving whisker stimulation. This latter group demonstrated recovery despite marked anatomical lesions suggesting that the intervention influenced reorganization.
