Impact of L-thyroxine on hippocampal activity, morphology, and behavioral performance in thyroidectomized rats.

Thyroid hormones, particularly L-thyroxine, are integral to cognitive processes like learning and memory. However, electrophysiological and morphological evidence connecting thyroid hormone activity to hippocampal function remains limited. This study aims to investigate the electrophysiological, morphological, and behavioral effects of L-thyroxine treatment in thyroidectomized (TX) rats, addressing the complex interplay between thyroid hormone regulation and hippocampal function.

Protective effects of hypothalamic proline-rich peptide and cobra venom Naja Naja Oxiana on dynamics of vestibular compensation following unilateral labyrinthectomy.

We tested the action of proline-rich peptide (PRP-1) and cobra venom Naja Naja Oxiana (NOX) on Deiters' nucleus neurons at 3rd, 15th and 35th days after unilateral labyrinthectomy (UL). Early and late tetanic, post-tetanic potentiation and depression of Deiters'neurons to bilateral high frequency stimulation of hypothalamic supraoptic and paraventricualar nuclei was studied. The analysis of spike activity was carried out by mean of on-line selection and special program.