Abstract:
:Hypothyroidal rats produced by low iodine diet or propylthiouracyl (PTU) were less active in the open field and received fewer food reinforcements than controls in a lever press situation at both 22 degrees C and 1 degree C. The hypothyroid rats also pressed less when heat was the reinforcer. On the other hand, hyperthyroidal rats produced by thyroid powder ingestion showed reduced emotionality in the open field. Acute exposure to cold failed to increase their alimentary or heat reinforced behavior. The results suggest that hypothyroidism produces a general inattention to the environment. This is found whether the environmental stimulus is an opportunity to explore, access to food or the availability of external heat.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Rial RV,Tur JA,Palmer AM,Tur Jdoi
10.1016/0031-9384(87)90140-5subject
Has Abstractpub_date
1987-01-01 00:00:00pages
119-23issue
2eissn
0031-9384issn
1873-507Xpii
0031-9384(87)90140-5journal_volume
41pub_type
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