Anatomy and Embryology

, Volume 178, Issue 3, pp 259–270

Cortical and brain stem projections to the spinal cord of the hedgehog (Erinaceus europaeus)

A horseradish peroxidase study
  • H. Michaloudi
  • A. Dinopoulos
  • A. N. Karamanlidis
  • G. C. Papadopoulos
  • J. Antonopoulos
Article

DOI: 10.1007/BF00318229

Cite this article as:
Michaloudi, H., Dinopoulos, A., Karamanlidis, A.N. et al. Anat Embryol (1988) 178: 259. doi:10.1007/BF00318229

Summary

Cortical and brain stem neurons projecting to the spinal cord in the hedgehog were studied by means of the horseradish peroxidase (HRP) tracing method. HRP injections were placed in the first cervical segments, in the cervical enlargement (C5-T3) and in the lumbar enlargement. Following injections in the first cervical segments and in the cervical enlargement labelled neurons were observed in the somatic motor and somatic sensory cortices, the paraventricular and the dorsomedial hypothalamic nucleus, the lateral hypothalamic area, the nuclei of field H of Forel, the red nucleus, the mesencephalic reticular formation, the deep layers of the superior colliculus, the Edinger-Westphal nucleus, the periaqueductal grey, the mesencephalic trigeminal nucleus, the loci coeruleus and subcoeruleus, the nuclei raphe dorsalis, centralis superior, raphe magnus, raphe pallidus, and raphe obscurus, the rhombencephalic reticular formation, the lateral, medial and caudal vestibular nuclei, the nucleus ambiguus, the nucleus of the solitary tract and the gracile nucleus. After HRP injections in the lumbar enlargement, labelled neurons were not found in the cortex, the dorsomedial hypothalamic nucleus, the nuclei of field H of Forel, the superior colliculus and the mesencephalic trigeminal nucleus. These results show that cortical and brain stem projection to the spinal cord are comparable to those described in other species.

Key words

CortexBrain stemSpinal afferentsHorseradish peroxidaseHedgehog

Abbreviations

ac

anterior commissure

Am

nucleus ambiguus

Aq

cerebral aqueduct

cc

corpus callosum

Cd

caudate nucleus

CE

cervical enlargement

CeS

nucleus centralis superior

CG

periaqueductal grey

ci

capsula interna

Cq

cochlear nuclei

cp

cerebral peduncle

Cu

cuneiform nucleus

CV

caudal vestibular nucleus

DM

dorsomedial hypothalamic nucleus

DX

dorsal motor nucleus of vagus

EC

external cuneate nucleus

EW

Edinger-Westphal nucleus

F

nuclei of field H of Forel

G

gracile nucleus

H

nippocampus

IC

inferior colliculus

IP

interpeduncular nucleus

LC

locus coeruleus

LE

lumbar enlargement

LH

lateral hypothalamic area

LL

nucleus of lateral lemniscus

lo

lateral olfactory tract

LV

lateral vestibular nucleus

MC

medial cuneate nucleus

MesV

mesencephalic trigeminal nucleus

MG

medial geniculate nucleus

MM

medial mammillary nucleus

MV

medial vestibular nucleus

oc

optic chiasm

PH

nucleus praepositus

Pn

pontine nuclei

Put

putamen

PV

paraventricular hypothalamic nucleus

R

red nucleus

Rd

nucleus raphe dorsalis

RGc

gigantocellular reticular nucleus

Rl

lateral reticular nucleus

Rm

nucleus raphe magnus

Rmes

mesencephalic reticular formation

Ro

nucleus raphe obscurus

Rpa

nucleus raphe pallidus

Rpc

caudal reticular nucleus of the pons

Rpo

rostral reticular nucleus of the pons

Rv

ventral reticular nucleus

s

solitary tract

SC

superior colliculus

SN

substantia nigra

SO

supraoptic nucleus

SR

sulcus rhinalis

STh

subthalamic nucleus

siV

spinal tract of trigeminal nerve

STV

nucleus of spinal tract of trigeminal nerve

subC

locus subcoeruleus

SuM

supramammillary nucleus

Th

thalamus

TS

nucleus of solitary tract

VM

ventromedial hypothalamic nucleus

ZI

zona incerta

3V

third ventricle

4V

fourth ventricle

IV

layer IV of the cortex

V

layer V of the cortex

VI

layer VI of the cortex

7

facial nucleus

12

hypoglossal nucleus

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • H. Michaloudi
    • 1
  • A. Dinopoulos
    • 1
  • A. N. Karamanlidis
    • 1
  • G. C. Papadopoulos
    • 1
  • J. Antonopoulos
    • 1
  1. 1.Department of Anatomy, School of Veterinary MedicineUniversity of ThessalonikiThessalonikiGreece