Mild traumatic lesion of the right parietal cortex of the rat: Selective behavioural deficits in the absence of neurological impairment

被引:33
作者
Hogg, S
Moser, PC
Sanger, DJ
机构
[1] Synthelabo Rech, F-92500 Rueil Malmaison, France
[2] Synthelabo Rech, F-92220 Bagneux, France
关键词
cerebral trauma; neurologic function; motor activity; paw reaching; water maze; passive avoidance; active avoidance; plus-maze; holeboard;
D O I
10.1016/S0166-4328(97)00146-0
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
Fluid impact models are widely used to study the histological and neurochemical consequences of traumatic brain injury and although behavioural consequences have also been studied, behavioural changes are often confounded by non-specific neurological deficits. In the present study we investigated behavioural effects of a unilateral mild traumatic lesion of the right lateral parietal cortex. This region is implicated in a number of basic and complex behaviors, and we therefore analyzed the performance of rats in a diverse range of behavioural procedures. The lesion had no effects on general neurological function, motor activity (activity boxes, rota-rod and paw reaching tests), habituation to a novel environment (holeboard), spatial learning ability (Morris water maze) or anxiety (elevated plus-maze). However, the lesioned animals demonstrated lower levels of exploration than the control group when novel objects were placed beneath some of the holes in the holeboard. Lesioned animals also differed from controls in their performance in passive and active avoidance procedures. In a step-through passive avoidance test the lesioned rats performed worse than the sham-operated controls, i.e. they had significantly lower entry latencies on the 2nd day. In contrast, in the active avoidance task the lesioned animals performed better than sham-operated rats, demonstrating a better ability to learn to avoid and escape from the shock. These diverse results in different tests of learning and memory, in particular the impairment in passive avoidance and the improvement in active avoidance behavior, are difficult to reconcile with a simple effect of the lesion on cognitive performance per se. The complete absence of general neurological deficits following the mild traumatic injury rules out the possibility that the observed behavioural changes reflect a non-specific impairment. These results demonstrate that mild traumatic lesion of the right parietal cortex can induce relatively selective behavioural changes that may serve to study functional recovery after trauma. However further work is required to establish the underlying deficit(s) that has led to the behavioural effects described here. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:143 / 155
页数:13
相关论文
共 35 条
[1]  
ADAMEC R E, 1991, Journal of Psychopharmacology, V5, P175, DOI 10.1177/026988119100500301
[2]  
ANDERSEN RA, 1987, HDB PHYSL 1, P483
[3]  
CAHN J, 1988, CURR PROB N, V7, P27
[4]   EFFECTS OF UNILATERAL PARIETAL LESIONS ON SPATIAL LOCALIZATION IN THE RAT [J].
CROWNE, DP ;
NOVOTNY, MF ;
MAIER, SE ;
VITOLS, R .
BEHAVIORAL NEUROSCIENCE, 1992, 106 (05) :808-819
[5]   THE EARLY ACQUISITION OF 2-WAY (SHUTTLE-BOX) AVOIDANCE AS AN ANXIETY-MEDIATED BEHAVIOR - PSYCHOPHARMACOLOGICAL VALIDATION [J].
FERNANDEZTERUEL, A ;
ESCORIHUELA, RM ;
NUNEZ, JF ;
ZAPATA, A ;
BOIX, F ;
SALAZAR, W ;
TOBENA, A .
BRAIN RESEARCH BULLETIN, 1991, 26 (01) :173-176
[6]   HANDLING ALTERS HABITUATION AND RESPONSE TO STIMULUS CHANGE IN THE HOLEBOARD [J].
FILE, SE ;
FLUCK, E .
PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR, 1994, 49 (03) :449-453
[7]   VISUALLY GUIDED LOCOMOTION, DISTRACTIBILITY, AND THE MISSING-STIMULUS EFFECT IN HOODED RATS WITH UNILATERAL OR BILATERAL LESIONS OF PARIETAL CORTEX [J].
FOREMAN, N ;
SAVE, E ;
THINUSBLANC, C ;
BUHOT, MC .
BEHAVIORAL NEUROSCIENCE, 1992, 106 (03) :529-538
[8]   SELECTIVE COGNITIVE IMPAIRMENT FOLLOWING TRAUMATIC BRAIN INJURY IN RATS [J].
HAMM, RJ ;
LYETH, BG ;
JENKINS, LW ;
ODELL, DM ;
PIKE, BR .
BEHAVIOURAL BRAIN RESEARCH, 1993, 59 (1-2) :169-173
[9]   MILD EXPERIMENTAL BRAIN INJURY IN THE RAT INDUCES COGNITIVE DEFICITS ASSOCIATED WITH REGIONAL NEURONAL LOSS IN THE HIPPOCAMPUS [J].
HICKS, RR ;
SMITH, DH ;
LOWENSTEIN, DH ;
MARIE, RS ;
MCINTOSH, TK .
JOURNAL OF NEUROTRAUMA, 1993, 10 (04) :405-414
[10]  
HOGG S, 1997, IN PRESS BEHAV BRAIN