Electronic Resource
Springer
Experimental brain research
41 (1981), S. 115-120
ISSN:
1432-1106
Keywords:
Imprinting
;
Synapse
;
Hemispheric asymmetry
;
Domestic chicks
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Fourteen chicks were hatched and reared in darkness to ≅ 21 h when they were exposed to overhead illumination for 0.5 h and then to an imprinting stimulus (a pulsing red light) for 20 min. The chicks were then matched in pairs on the basis of their activity. One member of each pair was returned to the dark and the other was trained for a further 120 min. All chicks were killed ≅ 6.5 h after the onset of training and perfused with fixative. Blocks were removed bilaterally from a restricted part of the hyperstriatum ventrale and prepared for electronmicroscopy. Various synaptic features were measured, all counts being performed ‘blind’. In undertrained chicks the length of the synaptic apposition zone in this part of the left hemisphere was shorter than that in the right by a mean value of 35±11.4 (SEM) nm. Further training eliminated this difference. No other synaptic measurements were affected by prolonging the period of training.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00236600
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