| First Author | Breuer TM | Year | 2022 |
| Journal | Eur J Neurosci | Volume | 55 |
| Issue | 2 | Pages | 566-588 |
| PubMed ID | 34927292 | Mgi Jnum | J:353176 |
| Mgi Id | MGI:7664280 | Doi | 10.1111/ejn.15572 |
| Citation | Breuer TM, et al. (2022) Sensory deprivation leads to subpopulation-specific changes in layer 6 corticothalamic cells. Eur J Neurosci 55(2):566-588 |
| abstractText | The effect of sensory deprivation on anatomical and physiological properties in two genetically defined types of layer 6 corticothalamic pyramidal cells in mouse somatosensory barrel cortex was investigated using in vitro electrophysiology. The two types analysed were the L6-Ntsr1 subtype, found preferentially in the upper region of layer 6 and projecting to both ventral posterior medial nucleus of the thalamus and posterior medial nucleus of the thalamus, and the L6-Drd1a subtype, located mostly in the lower regions of layer 6 and projecting to posterior medial nucleus. We found that the apical dendrite in L6-Ntsr1 cells is longer and more branched, compared with L6-Drd1a cells, and that the increase in firing frequency with increasing current stimulation is steeper in L6-Drd1a cells. Sensory deprivation was achieved clipping one row of whiskers from birth until the day of experiment (16 +/- 2 days). Mice of this age are actively exploring. In L6-Ntsr1, but not in L6-Drd1a cells, sensory deprivation decreased apical and basal dendrite outgrowth, and calcium influx evoked by backpropagating action potentials. These results contribute to the ongoing functional characterisation of corticothalamic layer 6 cells and indicate differences in the postnatal cortical refinement of two distinct corticothalamic circuits. |
