Linked Life Data

2192819

Source:http://linkedlifedata.com/resource/pubmed/id/2192819

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1990-7-31
pubmed:abstractText
Male meadow voles kept in a long photoperiod (LP) from birth to 70 days of age have heavier brains than those kept in a short photoperiod (SP). Brain weights of male voles kept in the LP first exceeded those of SP animals at 20 days of age; differences were greatest at 35 days (5.8%) and persisted through 140 days of age (2%), although the magnitude of the difference declined progressively. Accelerated compensatory increases in brain weight were observed in voles transferred from the SP to the LP at 70 days of age. Total brain DNA content, an index of cell number, was not significantly affected by initial or final photoperiod, although it increased 7.8% within 70 days after voles were transferred from the SP to the LP. Brain weights (but not DNA content) of males exceeded those of females, but this sex difference was present only in the LP. We suggest that short day lengths retard brain development by reducing rates of myelination and possibly reducing cell size as well; this is part of a general retardation of somatic growth associated with a delayed onset of puberty that can be reversed by a stimulatory LP but, ordinarily, occurs spontaneously as voles become refractory to short day lengths.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0165-3806
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
264-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Long day lengths promote brain growth in meadow voles.
pubmed:affiliation
Department of Psychology, University of California, Berkeley 94720.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.