Experimental Brain Research

, Volume 80, Issue 3, pp 501–511

Interconnections of the auditory cortical fields of the cat with the cingulate and parahippocampal cortices

  • E. M. Rouiller
  • G. M. Innocenti
  • F. De Ribaupierre
Article

DOI: 10.1007/BF00227991

Cite this article as:
Rouiller, E.M., Innocenti, G.M. & De Ribaupierre, F. Exp Brain Res (1990) 80: 501. doi:10.1007/BF00227991

Summary

The interconnections of the auditory cortex with the parahippocampal and cingulate cortices were studied in the cat. Injections of the anterograde and retrograde tracer WGA-HRP were performed, in different cats (n = 9), in electrophysiologically identified auditory cortical fields. Injections in the posterior zone of the auditory cortex (PAF or at the PAF/AI border) labeled neurons and axonal terminal fields in the cingulate gyrus, mainly in the ventral bank of the splenial sulcus (a region that can be considered as an extension of the cytoarchitectonic area Cg), and posteriorly in the retrosplenial area. Labeling was also present in area 35 of the perirhinal cortex, but it was sparser than in the cingulate gyrus. Following WGA-HRP injection in All, no labeling was found in the cingulate gyrus, but a few neurons and terminals were labeled in area 35. In contrast, no or very sparse labeling was observed in the cingulate and perirhinal cortices after WGA-HRP injections in the anterior zone of the auditory cortex (AI or AAF). A WGA-HRP injection in the cingulate gyrus labeled neurons in the posterior zone of the auditory cortex, between the posterior ectosylvian and the posterior suprasylvian sulci, but none was found more anteriorly in regions corresponding to AI, AAF and AII. The present data indicate the existence of preferential interconnections between the posterior auditory cortex and the limbic system (cingulate and parahippocampal cortices). This specialization of posterior auditory cortical areas can be related to previous observations indicating that the anterior and posterior regions of the auditory cortex differ from each other by their response properties to sounds and their pattern of connectivity with the auditory thalamus and the claustrum.

Key words

Auditory cortexCorticocortical connectionsCingulate cortexParahippocampal cortexLimbic systemCat

Abbreviations

AAF

anterior auditory cortical field

aes

anterior ectosylvian sulcus

AI

primary auditory cortical field

AII

secondary auditory cortical field

ALLS

anterior-lateral lateral suprasylvian visual area

BF

best frequency

C

cerebral cortex

CC

corpus callosum

CIN

cingulate cortex

CL

claustrum

DLS

dorsal lateral suprasylvian visual area

DP

dorsoposterior auditory area

E

entorhinal cortex

IC

inferior colliculus

LGN

lateral geniculate nucleus

LV

pars lateralis of the ventral division of the MGB

LVe

lateral ventricule

MGB

medial geniculate body

OT

optic tract

OV

pars ovoidea of the ventral division of the MGB

PAF

posterior auditory cortical field

pes

posterior ectosylvian sulcus

PLLS

posterior-lateral lateral suprasylvian visual area

PS

posterior suprasylvian visual area

PU

putamen

RE

reticular complex of thalamus

rs

rhinal sulcus

SC

superior colliculus

SS

suprasylvian sulcus

T

temporal auditory cortical field

TMB

tetramethylbenzidine

VBX

ventrobasal complex of thalamus, external nucleus

VL

pars ventrolateralis of the ventral division of the MGB

VLS

ventrolateral suprasylvian visual area

VPAF

ventroposterior auditory cortical field

WGA-HRP

wheat germ agglutinin labeled with horseradish peroxidase

wm

white matter

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • E. M. Rouiller
    • 1
  • G. M. Innocenti
    • 2
  • F. De Ribaupierre
    • 1
  1. 1.Institute of Physiology, University of LausanneLausanneSwitzerland
  2. 2.Institute of Anatomy, University of LausanneLausanneSwitzerland
  3. 3.Dept. of PhysiologyUniversity of FribourgPérollesSwitzerland