BNT162b2 Vaccine Induces Antibody Release in Saliva: a Possible Role for Mucosal Viral Protection?

Experiments were performed in two groups of cats with the retrograde fluorescent double-labelling technique, in order to determine the existence of axonal branching of cortico-cortical neurones of area SI. Associative SI-SII and callosal SI-SII neurones were retrogradely labelled in one group of animals and callosal SI-SI and SI-SII neurones in another group. In each group, double-labelled cells were extremely rare in SI. The present study shows that different sets of cortico-cortical projections, which originate from the same layers and from the same zone of area SI, arise overwhelmingly from separate populations of neurones.