Influence of sex and hormonal status on initial impact and neurocognitive outcome after subarachnoid haemorrhage in rats

Simone Maria Kagerbauer*, Vojtech Kadera, Lucia Maria Gordan, Manfred Blobner, Elisabeth Török, Sebastian Schmid, Armin Horst Podtschaske, Bettina Jungwirth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The aim of this study was to detect differences in functional outcome after experimental subarachnoid haemorrhage (SAH) in rodents with different hormonal status. For this purpose, the endovascular perforation model was applied to four groups of Sprague-Dawley-Rats: male intact, male neutered, female intact and female neutered animals. Initial impact was measured by ICP, CPP and cerebral blood flow in the first hour after SAH. From day 4–14, the modified hole board test was applied to assess functional and neuro-cognitive outcome. Histological outcome was examined in the motor cortex and hippocampus of each hemisphere. Mortality was highest in the female intact group albeit not statistically significant. Physiologic parameters did not differ significantly between groups either. In the modified hole board test, male intact animals showed a greater impairment of declarative memory than the female intact and neutered groups. However, male intact animals showed greater avoidance behaviour and male animals revealed higher anxiety levels independent of hormonal status. No differences in histological damage of hippocampus and motor cortex between groups could be shown. We therefore speculate that the marginal deficits in cognitive performance that are shown by the male intact group in the modified hole board test are mostly caused by higher anxiety levels and cannot be interpreted as pure cognitive impairment.

Original languageEnglish (US)
Pages (from-to)13-22
Number of pages10
JournalBehavioural Brain Research
StatePublished - May 2 2019


  • Endovascular perforation
  • Functional outcome
  • Modified hole board test
  • Sex
  • Sprague-Dawley-Rats
  • Subarachnoid haemorrhage

ASJC Scopus subject areas

  • Behavioral Neuroscience


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