Effect of ?-Endorphin and naloxone on acquisition, memory, and retrieval of shuttle avoidance and habituation learning in rats

1980 ◽  
Vol 69 (1) ◽  
pp. 111-115 ◽  
Author(s):  
Ivan Izquierdo
1970 ◽  
Vol 19 (1) ◽  
pp. 21-22 ◽  
Author(s):  
Drake C. Chisholm ◽  
John W. Moore
Keyword(s):  

2011 ◽  
pp. 346-368
Author(s):  
Henry Calderwood
Keyword(s):  

1985 ◽  
Vol 86 (6) ◽  
pp. 385-391
Author(s):  
Tsutomu KAMEYAMA ◽  
Toshitaka NABESHIMA ◽  
Kazumasa YAMAGUCHI ◽  
Kiyoshi MATSUNO

1969 ◽  
Vol 19 (4) ◽  
pp. 623-627 ◽  
Author(s):  
Robert W. Powell ◽  
Harry Mantor

1974 ◽  
Vol 35 (1) ◽  
pp. 319-326 ◽  
Author(s):  
Neil S. Buckholtz

C57BL/6J and DBA/2J mice of two different ages (2 to 3 mo. vs 11 to 14 mo.) were given 20 trials per day for 6 days in a shuttle-avoidance task. Pentylenetetrazol (5, 10, or 20 mg/kg) or saline was given intraperitoneally immediately after Trial 20 on Days 1 to 5. The results showed a marked strain difference with DBA/2J mice superior to C57BL/6J mice. The effects of age on avoidance depended on both strain and sex. There was no effect of pentylenetetrazol in facilitating avoidance learning. A second experiment examined shuttle-avoidance learning in C57BL/6J and DBA/2J mice of three age groups: adult (2 to 4 mo.), aged (6 to 8 mo.), and senile (18 to 22 mo.). Over-all, DBA/2J mice performed better than C57BL/6J mice. There was no deterioration in avoidance learning with increased age.


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