RESUMEN
The extent of cortical representation of the peripheral sensory field depends on its importance for species behavior. The orientation sound of the mustache bat (Pteronotus parnellii rubiginosus) invariably consists of long constant-frequency and short frequency-modulated components and is indispensable for its survival. A disproportionately large part of the auditory cortex of this bat is occupied by neurons processing the predominant components in the orientation signal and Doppler-shifted echoes. This disproportionate cortical representation related to features of biologically significant signals is comparable to that in the somatosensory and visual systems in many mammals, but it has not previously been observed in the auditory system.
Asunto(s)
Corteza Auditiva/fisiología , Quirópteros/citología , Ecolocación/fisiología , Orientación/fisiología , Potenciales de Acción , Animales , Corteza Auditiva/irrigación sanguínea , Corteza Auditiva/citología , Potenciales Evocados , SonidoRESUMEN
The glomeruli of frugivorous and carnivorous species indicate presence of sialomucins and that of insectivorous species both sialomucins and sulphomucins. In semi-hibernating insectivorous species the glomerular basal border and bowman's capsule contain only neutral mucopolysaccharide and in others both neutral mucopolysaccharide and sialomucins. The significance of these renal mucopolysaccharide is indicated.