Evoked unitary and gross electric activity in the cerebral cortex in early prenatal ontogeny.

摘要: DURING development, the form of electrocortical surface response elicited by peripheral stimulation undergoes a series typical changes which have been thought to reflect functional maturation cerebral cortex. Most electrophysiological studies subject (for example, ref. 1), however, performed on post-natal animals, in structural and development cortex is comparatively advanced, so very early stages largely neglected. Molliver2 recently found that somaesthetic evoked tactile nose prenatal preparations sheep dominated positive deflexion at its earliest appearance, during next developmental phase this potential displays positive–negative configuration. made using gross electrodes only. Recordings potentials unitary neuronal activity varying depths should provide information about accurate location observed with recording. Furthermore, our concurrent recordings will help reveal sequence neurones various cortical layers become activated afferent inflow development. The aim present study was investigate maturation; other words, when first signs apparent.